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User’s Manual

FCC COMPLIANCE STATEMENT

FOR AMERICAN USERS

This equipment generates and uses radio frequency energy and if not installed and used properly,

that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio

and television reception. It has been type tested and found to comply with the limits for a Class B

computing device in accordance with the specifications in Subpart J of part 15 of FCC Rules, which

are designed to provide reasonable protection against such interference in a residential installation.

However, there is no guarantee that interference will not occur in a particular installation. If this

equipment does cause interference to radio or television reception, which can be determined by

turning

the equipment off and on, the user is encouraged to try to correct the interference by one or

more of the following measures:

- Reorient the receiving antenna

- Relocate the printer with respect to the receiver

- Plug the printer into a different outlet so that the printer and receiver are on different branch

circuits.

If necessary, the user should consult the dealer or an experienced radio/television technician for

additional suggestions. The user may find the following booklet prepared by the Federal Communi-

cations Commission helpful:

“Television Interference Handbook.”

This booklet is available from the U.S. Government Printing Office, Washington, DC 20402. Stock

No. 004-000-00450-7.

WARNING

The connection of a non-shielded printer interface cable to this printer will invalidate the FCC

Certification of this device and may cause interference levels which exceed the limits established by

the FCC for this equipment. If this equipment has more than one interface connector, do not leave

cables connected to unused interfaces.

transmitted, in any form or by any means, mechanical, photocopying, recording or otherwise, with-

out the prior written permission of Seiko Epson Corporation. No patent liability is assumed with

respect to the use of the information contained herein. While every precaution has been taken in the

preparation of this book, Seiko Epson Corporation assumes no responsibility for errors or omissions.

Neither is any liability assumed for damages resulting from the use of the information contained

herein.

Seiko Epson Corporation and its affiliates specifically disclaim any and all liability for any damages

or claims based upon or due to the use or combination of any Epson printer with any hardware,

software or other items not supplied by Seiko Epson Corporation or its affiliates or approved by

Seiko Epson Corporation or its affiliates for use with Epson printers.

ActionPrinter is a trademark of Epson America, Inc.

Centronics is a registered trademark of Centronics Data Computer Corporation.

Epson and ESC/P are registered trademarks of Seiko Epson Corporation.

IBM is a registered trademark of International Business Machines Corporation.

Microsoft is a registered trademark of Microsoft Corporation.

Torrance, California

Contents

Introduction

About This Manual

Where to Get Help

Chapter 1

Setting Up Your T-750 Printer

l-1 Unpacking Your Printer

1-2

Selecting the Right Location

1-3 Installing the Ribbon

1-6 Loading Continuous-feed Paper

1-12 Turning On the Printer

1-12Operating the Control Panel

1-14

SelecType

l-16 Running the Self Test

1-17 Connecting the Printer to Your Computer

1-18 Choosing the Operating Mode with DIP Switches

Chapter 2

Choosing and Loading Paper

2-1 Choosing Paper

2-l Using Single-sheet Paper

2-6

Reinstalling the Tractor Unit

2-8

The Paper Thickness Lever

Chapter 3

Using the T-750 with Application Programs

3-1 Printer Selection Menus

3-2

Computer - Printer Communication

3-3 Word Processors

3-4 Spreadsheets

3-6 Graphics Programs

3-6 Programming Languages

Contents

iii

Chapter 4

T-750 Printer Features

4-1 Quality and Fonts

4-2

Print Size and Character Width

4-2

Pitches and Proportional Spacing

4-3 Special Effects and Emphasis

4-4

Using Different Character Sets

4-5

Page Layout and Other Commands

Chapter 5

Graphics and User-defined Characters

5-2 The Print Head

5-3 Pin Labels

5-4 Graphics Commands

5-6 Simple Graphics Programming

5-8 Density Varieties

5-10 Designing Your Own Graphics

5-13 User-defined Characters

Appendix A

Command Summary

A-4 Commands in Numerical Order

A-7 Epson (ESC/P) Commands

A-36 IBM Printer Emulation Mode Commands

Appendix B

Character Tables

B-l Epson Mode

B-9

Epson International Character Sets

B-11 IBM Printer Emulation Mode

Appendix C

Problem Solving and Maintenance

C-l General Troubleshooting

C-3 Troubleshooting Graphics Problems

C-3 Data Dump Mode

C-4 IBM PC BASIC Solutions

C-5 Maintaining Your Printer

C-7 Transporting the Printer

Contents

Appendix D

Defaults and DIP Switches

D- 1

Default and Initialization Settings

D-2 DIP Switch Settings

D-3 International Character Sets

Appendix E

Technical Specifications

E-1 Printing

E-l Paper

E-2 Mechanical

E-2 Electrical

E-3 Environment

E-3 Parallel Interface

E-5 Data Transfer Sequence

Glossary

Index

Contents

Introduction

The ActionPrinter™ T-750 combines all the well-known virtues of

previous Epson 9-pin printers with many features normally exclusive to

costly 24-pin printers.

The speed of draft printing is 240 characters per second in draft elite

and 200 in draft pica. When you have perfected a document, you

can switch to one of two Near Letter Quality fonts-Roman or

Sans Serif.

D r a f t p r i n t i n g i s e x t r e m e l y f a s t .

N L Q R o m a n i s c l e a r a n d t y p e w r i t e r - l i k e .

NLQ Sans Serif is crisp and distinctive.

The SelecType feature gives you access to Near Letter Quality

(NLQ) and condensed print. All you have to do is press the button

for the style you want. While the T-750 is printing, the SelecType

panel shows you what choices it’s using.

If you are using software designed for an IBM@ printer, you have the

choice of using the T-750 in Epson mode or IBM printer emulation

mode. Even better, you can combine the best of both worlds; the

powerful Epson mode commands can now print character graphics

like those used by IBM printers and computers.

Loading paper is now easier than ever. Single sheets can be loaded

by just moving a lever, and the tractor lets you load a wide range of

widths of continuous-feed paper, including labels.

For headings and other emphasis, you can use double-high and

double-wide printing.

Introduction

About

This Manual

To make it easier to set up your new T-750, this manual includes a

lo-step guide. This guide, which is printed on the inside of the back

flap, summarizes the first chapter’s setting up instructions.

Chapters 2 through 5 cover the basic and advanced functions, and

the appendixes contain reference information, including all the details

you need to use any of the printer’s commands, and some advice on

solving problems.

Finally, there is a glossary of printer terms, a comprehensive index,

and inside the back of the manual is a pull-out Quick Reference card

containing the information you need most.

Where to Get Help

For technical assistance with your T-750 printer, just call the toll-free

Epson number: l-800-421-5426 (7 AM to 5 PM PST).

For warranty repairs and to find out the location of your nearest

Authorized Epson Customer Care Center, call l-800-922-8911

(24 hours a day, seven days a week).

To purchase accessories, check with the store where you purchased

your printer or call I-800-922-8911 for the location of your nearest

Authorized Epson Dealer.

Introduction

Chapter 1

Setting Up Your T-750 Printer

Setting up your new T-750 is easy. Simply follow the steps in this

chapter.

1 Unpacking Your Printer

First, remove the printer from the box and take off all outside plastic

covering and foam supports. Make sure you have received all the parts

shown in the illustration below.

Tilt the tractor cover up and remove the two foam pads underneath

it. (These pads protect the tractor unit during shipping; be sure to save

them.)

Setting Up Your T-750 Printer

1 - 1

l Place the printer or printer stand on a solid and level foundation.

Avoid setting it on carpet or on unstable surfaces such as chairs.

l Use a grounded outlet-one that has three holes to match the power

plug on the printer. Don’t use an adapter plug.

Avoid using electrical outlets that are controlled by wall switches. If

you accidentally turn off a switch, you could wipe out valuable

information and stop your printing.

Keep your printer and computer away from base units for cordless

telephones.

Avoid using an outlet on the same circuit breaker with large

electrical machines or appliances that might disrupt the flow of

power to your printer.

l Choose a place that is clean and away from moisture, dust, and

excessive heat (such as a heater or direct sunlight).

If you are going to use continuous-feed paper, clear enough space

around the printer so that the paper has an unobstructed path in and

out of the printer. There are three common methods of arranging a

printer and continuous paper:

Using a printer stand with the paper stacked underneath it.

l Using a desk or table as a stand, with the printer near the rear edge

and the paper on the floor or on a shelf.

l Putting the printer on a desk or table and stacking the paper behind

the printer.

Installing the Ribbon

To install the ribbon, follow the directions below:

1. Remove the tractor cover that comes installed on the printer. TO

remove it, simply pull the back of the cover toward you until the

cover is vertical. Then lift it up and off the printer.

2. Manually moved the print head to the middle of the platen.

Setting Up Your T-750 Printer

1-3

WARNING

The power must be OFF

hen you move the print head. Moving the

print head when the power is ON may damage your printer. If you’ve

been using your printer just before changing the ribbon cartridge, be

careful not to touch the print head because it becomes hot during use.

3. Before installing the ribbon cartridge, turn the small knob on top in

the direction of the arrow to tighten the ribbon as shown in Figure l-3.

Figure 1-3.

Tightening the ribbon

4. Hold the cartridge by the two plastic tabs. Lower the cartridge into

the printer, guiding the two pins on each end of the cartridge into

the slots in the printer frame, as shown in Figure 1-4. Press firmly on

each end of the cartridge to make sure the pins are firmly seated in

the slots,

5. Now use the point of a pencil to guide the ribbon into place be-

tween the ribbon guide and the print head as shown in Figure l-5.

(There is also a diagram on the top of the ribbon cartridge itself.)

6. With the cartridge in place, again turn the ribbon knob in the

direction of the arrow to tighten the ribbon.

And that’s it-the ribbon is now installed.

1-4 Setting Up Your T-750 Printer

Figure 1-4.

Installing the

ribbon cartridge

Figure l-5.

Positioning the

ribbon

Setting Up Your

T-750

Printer

1-5

Replacing the ribbon...

When buying new ribbon cartridges for the T-750, be sure you get

a ribbon specifically for Epson T-750 or FX series printers. Ribbon

cartridges for other Epson printers, such as the L-1000 or LQ series,

closely resemble T-750 ribbons, but their use can cause poor print

quality. Also, the Epson ribbon replacement pack #7755 should not

be used as a replacement ribbon.

The T-750 uses a continuous-loop, inked fabric ribbon (#8755).

When your printing becomes too light, replace the ribbon with a

fresh cartridge. To replace the ribbon, just pull up on the two plastic

tabs on the ribbon cartridge and lift it out of the printer. To install a

new ribbon, follow the preceding steps.

4 Loading Continuous-feed Paper

When you receive your T-750, it is set up to print on continuous-feed

paper. If you plan to use single-sheet paper, turn to Chapter 2 for

instructions on setting up the printer for single sheets. If you have

bought the optional automatic sheet feeder, complete the remainder of

the setup steps before you install the automatic sheet feeder (which has

its own manual).

The T-750 tractor units are adjustable to accommodate different

widths of paper, from 4 to 16 inches. Before you load continuous-feed

paper, prepare the printer in the following manner:

1. Make sure the printer is turned off.

2. Remove the tractor cover that comes installed on the printer. To

remove it, simply pull the back of the cover toward you until it is

vertical. Then lift the cover up and off the printer.

3. Install the paper rest as shown in Figure l-6. This part helps prevent

the paper from catching on the printer cable.

1-6

Setting Up Your T-750 Printer

Figure 1-6.

Installing the paper rest

4. Pull both the paper release lever and the paper bail lever toward the

front of the printer. (Figure 1-6 shows where these levers are.)

Setting Up Your T-750 Printer

1-7

Now you are ready to load the continuous-feed paper. Just follow the

steps below:

1. Using Figure 1-7 as a guide, pull the locking levers on the pin-feed

holders forward so that you can move the holders to the left and

right.

Figure 1-7.

Pin-feed locking levers

2. Move the left holder so that the locking lever is about l/4 inch

from the left side and push the locking lever back to lock that

holder in place. Leave the right holder unlocked.

3. Open the pin-feed covers as shown in Figure l-8.

WARNING

Do not use the pin-feed covers to move the pin-feed holders,

1-8

Setting Up Your T-750 Printer

Figure 1-8.

Open pin-feed cover

4. Guide the paper into the paper slot, and push it through until it

comes up between the ribbon guide and the platen. (Moving the

paper with a side-to-side motion makes it easier to push the paper

through.)

5. Pull the paper up until the top is above the pin-feed holders. Fit the

holes on the left side of the paper over the pins in the left holder (as

shown in Figure l-9) and close the cover.

Figure

1-9.

Fitting the paper over the

pin feeds

Setting Up Your T-750 Printer

1-9

6. Fit the right side of the paper into the right holder, moving the

holder as needed to match the width of the paper.

7. Close the right cover, making sure the paper has

dips or wrinkles

and lock the right holder in place.

Now that you have loaded the continuous-feed paper, prepare the

printer for printing.

1. Push the paper bail lever back.

2. Hold the paper guide above the printer. Insert the right hinge tab

into the right tab slot, as shown in Figure l-10. Then insert the left

tab into the left slot and push the guide back so that it is horizontal.

Figure 1-10.

Installing the paper guide

This guide keeps paper that is coming out of the printer from

interfering with the paper going in. The guide is also used in the

upright position for printing on single sheets of paper.

1-10

Setting Up Your T-750 Printer

3. With the printer turned OFF, advance the paper with the paper

feed knob on the right side of the printer until the first row of

perforations is about even with the top of the ribbon. (See

Figure 1-11.)

Figure 1-11.

Setting top of form

This is the top of form position. It makes your printed pages end

where you want them to and prevents the printer from printing on the

perforations. The paper should be in this position when the power is

turned on or when software initializes the printer or sets the page

length.

4. Replace the tractor cover.

Loading single-sheet paper...

The T-750 can also accommodate single-sheet paper. It can be

loaded one sheet at a time as shown in Chapter 2 or by using the

optional automatic sheet feeder. Chapter 2 also contains

information on how to remove and reinstall the tractor feed unit.

The printer cover that comes packaged with the T-750 is for use

with single-sheet paper.

Setting Up Your T-750 Printer

1-11

5 Turning On the Printer

Before plugging in the power cord, see that the power switch near

the back of the left side of the printer is turned off; then plug the

power cord into a properly grounded socket.

WARNING

Before turning on the printer, be absolutely sure you have removed all

packing materials. Turning on the printer when the print head cannot

move may seriously damage the mechanism.

Now, turn the power ON with the switch on the left side of the

printer. When you turn on the printer, three things happen:

l The print head moves back and forth and stops at the left side of the

printer; this is the home position.

The printer is initialized and set to certain default settings (which are

fully described in Appendix D).

l The green power light on the control panel comes on.

6 Operating the Control Panel

The control panel is shown in Figure l-12.

Figure

1-12.

The T-750 control panel

1-12

Setting Up Your T-750 Printer

The three buttons nearest the front of the printer control advancing

the paper and communication with the computer. The four indicator

lights show when the printer is turned on and when it is ready to use.

The buttons

There are three large buttons on the control panel.

OFF LINE/

ON LINE

The green light next to this button indicates that

the printer is able to receive and print data from

the computer. When the light is off, the printer is

off line and cannot receive any data. Press the

button to change from on line to off line or from

off line to on line. The printer automatically goes

off lined when you try to print without paper in

the printer. Pressing the button then has no

effect until you load paper.

FORM FEED/

ROMAN

When the printer is off line, this button ejects a

single sheet of paper or advances continuous

paper to the next top of form.

When the printer is on line and in NLQ mode,

pressing the button selects the Roman font.

LINE FEED/

SANS SERIF

When the printer is off line, this button

advances the paper one line each time you press

it or continuously if you hold it down. When the

printer is turned on, use this button to advance

paper.

When the printer is on line and in NLQ mode,

pressing the button selects the Sans Serif font.

Note

Use the paper feed knob on the right side of the printer only when the

printer is turned OFF. Using it when the printer is on can damage the

printer mechanism.

The indicator lights

In addition to the

ON LINE

light, the printer has three other lights.

POWER

This comes on to show that the printer is

connected to the power and is turned on.

READY

This comes on when the printer is on line and

ready to print. It normally flickers during

printing.

Setting Up Your T-750 Printer

1-13

PAPER OUT

This comes on when the printer is out of paper.

Also on the control panel are two touch switches that let you choose

the print style and size. These are the SelecType buttons, which are

described in the next section.

SelecType

The SelecType feature consists of two buttons on the control panel.

These buttons select the most used printing features-Near Letter

Quality (NLQ) and condensed.

With the two SelecType buttons, you can produce any of the four

typestyles shown below:

D r a f t p r i n t i n g i s e x t r e m e l y f a s t .

N L Q i s c l e a r a n d t y p e w r i t e r - l i k e .

Draft can be condensed.

NLQ can also be condensed for more characters on a line.

Draft is for fast printing and NLQ for higher-quality work. In the

condensed mode all characters are about 60% of their normal width.

Two NLQ fonts are available: Roman and Sans Serif. You select

them by using the FORM FEED and LINE FEED buttons while the printer

is on line. The

FORM FEED

button selects Roman, and the

LINE FEED

button selects Sans Serif. A software command to change the NLQ

typeface is also available in the Epson mode.

N L Q R o m a n i s c l e a r a n d t y p e w r i t e r - l i k e .

NLQ Sans Serif is crisp and distinctive.

If you want NLQ printing, simply press the

NLQ

button. If you want

condensed printing, simply press the

CONDENSED

button.

When you press either SelecType button, it beeps twice and its

orange indicator light turns on to show that you have selected it. If you

1-14

Setting Up Your T-750 Printer

want to turn off either mode, press its button again. It beeps once and

the indicator light turns off to show that the mode is cancelled.

As you can see, SelecType makes it easy to choose either NLQ or

condensed, and the indicator lights always tell you which modes you’ve

selected.

Trying out SelecType is a simple three-step process:

1. Create a short sample document or file with your favorite

application program.

2. Press either or both of the SelecType buttons.

3. Print the document or file using your application program’s print

command.

If SelecType does not work

Some applications programs are designed to control all typestyle

functions. Before each printing operation, these programs cancel all

previous typestyle settings by sending a signal (INIT) or by sending

specific control codes to cancel certain typestyles. These signals or

control codes may cancel your SelecType settings.

One reset signal, however, does not affect your SelecType settings.

This is the ESC @ command.

You can see whether your program is changing your settings by

watching the buttons when printing starts. If the lights change, the

program is controlling the typestyles.

If your application program changes your SelecType settings, you

have two choices:

1. Use the program’s setup procedure (which could be called by

another name, such as install) to remove the codes that interfere

with your SelecType settings.

2. Use the print control codes for your application program instead of

SelecType to control your printing. Most programs that cancel

SelecType settings also have sophisticated print control commands

that give the same results that SelecType does. The manual for your

program should explain the necessary commands.

Setting Up Your T-750 Printer

1-15

Note

Also remember that control codes in your document will override the

SelecType settings. Therefore, if you have a code for NLQ in your

document and you press the

DRAFT

SelecType button, your printing

will still be in NLQ.

8 Running the Self Test

The T-750 has a built-in self test that prints out the characters in its

memory so that you can see that the printer is working properly.

The self test also prints the settings of the printer’s DIP switches.

You’ll use this part of the printout in the last section of this chapter.

Before running the self test, make sure that the

power

is OFF and

paper is loaded in the printer. (Use wide paper to avoid printing on the

platen.)

To run the self test in the Near Letter Quality (NLQ) mode, hold

down the

FORM FEED

button at the same time you turn the printer on.

When the printing starts, release the

FORM FEED

button.

The self test first prints the version number of the printer and several

lines of settings that are explained in the last section of this chapter.

Then it prints the characters from its memory. The test continues until

you turn the printer off. Part of a typical self test is shown below.

Character mode Normal 1-1 OFF

Shape of zero 0 (Unslashed) 1-2 OFF

CG Table Italics 1-3 OFF

Protocol mode ESC/P 1-4 OFF

Print Quality Draft 1-5 OFF

Country

U.S.A.

1-6

1-7

1-8

Page Length 11 inch

2-1 OFF

CSF Mode Invalid

2-2 OFF

Skip Perforation

None 2-3 OFF

Auto LF Depend on I/F

2-4 OFF

l-16

Setting Up Your T-750 Printer

To run the same test in the draft mode, hold down the

LINE FEED

button instead of the

FORM FEED

button while you turn the printer on.

The T-750 cannot print a draft self test, however, if the NLQ DIP switch

is on. Therefore, if the Print Quality line of the self test printout says

NLQ, you cannot print a draft test without changing a DIP switch.

9 Connecting the Printer to Your Computer

Your T-750 printer communicates with your computer through a

Centronics® compatible parallel interface. If your computer uses this

type of interface and you have a suitable cable, you can connect your

computer immediately. (Be sure that your cable is a shielded cable.)

If you do not know what kind of interface your computer requires,

consult its manual. For further information on the standard interface,

see Appendix E.

The parallel interface

Before connecting a parallel interface cable, see that both the printer

and computer are turned off. Then plug the connector into the printer.

Next squeeze the clips gently and click them into place.

Some parallel cables have a ground wire. Connect this wire to the

ground screw on the printer to protect data from interference. Then

plug the other end of the cable into the computer and connect the

ground wire on the computer end of the cable if it has one. Figure 1-13

shows a properly connected parallel cable.

Figure 1-13.

Connecting a parallel cable

Setting Up Your T-750 Printer

1-17

10 Choosing the Operating Mode with DIP Switches

The T-750 has 12 switches that allow you to change many of the

printer’s settings to suit your individual needs. You may need to change

one or two of them now. These switches, known as DIP (Dual In-line

Package) switches, are in the back of the printer. See Figure 1-14.

Figure 1-14.

DIP switch location

The switches are in two groups and are numbered, as shown in

Figure 1-14. As you can see in the example below, the first part of the

self test shows the settings of the switches. You will find your own self

test printout helpful as you use this section.

Character mode

Shape of zero

CG Table

Protocol mode

Print Quality

Country

Page Length

CSF Mode

Skip Perforation

Normal 1-1 OFF

0 (Unslashed) 1-2 OFF

Italics 1-3 OFF

ESC/P 1-4 OFF

Draft 1-5 OFF

U.S.A.

1-6 ON 1-7 ON 1-8

11 inch 2-1 OFF

Invalid 2-2 OFF

None 2-3 OFF

Auto LF Depend on I/F 2-4 OFF

1-18

Setting Up Your T-750 Printer

Before you change any

DIP

switch settings, turn the printer around

to give you easy access to the switches. Then you can easily turn the

switches on and off with a thin pointed object, such as a small

screwdriver or the cap of a ballpoint pen. The switches are ON when

they are UP and OFF when they are DOWN.

Note

When you change a DIP switch setting, turn off the power, reset the

switch or switches, then turn on the power again. The printer checks

and recognizes new settings only at the time you turn the power on.

The operating mode

The T-750 has two operating modes, ESC/P ® and IBM printer

emulation mode. ESC/P stands for Epson Standard Code for Printers,

a powerful set of commands developed by Epson and supported by

almost all application software for personal computers. This is the

mode that you should find the most useful and valuable for your

printing. The rest of this manual refers to the ESC/P mode simply as

the Epson mode.

The IBM printer emulation mode is for software that is designed only

for IBM printers. It is not necessary to use this mode for your T-750 to

be compatible with IBM computers. As you can see from the list of

Epson and IBM printer emulation mode commands in Appendix A,

the Epson mode has more commands and many more capabilities.

There are only two cases in which you may want to use the IBM

printer emulation mode:

1. Your software lists only IBM printers in its printer selection menu.

2. You need to use the following characters and your application

software will not print them in the Epson mode:

If you select IBM printer emulation mode with the DIP switch and

choose an IBM printer in your software’s printer selection menu, your

T-750 will behave as an IBM printer does. You can use most software

that supports IBM printers, but you will notice that the commands do

not allow you access to all the features of your Epson printer.

Setting Up Your T-750 Printer

1-19

DIP switch 14 controls the choice of operating modes. Turning the

switch OFF selects Epson mode, and turning it ON selects IBM printer

emulation mode.

The Epson character graphics set

Half of the characters used by IBM PCs and compatibles are special

character graphics and international characters. Most previous Epson

printers printed italics instead of these characters. With the T-750,

however, you can print the character graphics without losing italics or

any of the power of the Epson commands.

DIP

switch l-3 controls the choice between the italic and the

character graphic table (called CG table in the DIP switch printout).

Turning the switch ON selects the character graphic table, and turning

it OFF selects the italic table. Remember that italics are available even

if you select the character graphic table.

Making the choice

The decision you make about the operating mode and the character

graphics set depends upon the software you use. For most applications,

choose the Epson mode and the Character Graphics set (DIP switch

l-4 OFF and DIP switch 1-3 ON). That way you can set up your

software for an Epson printer and have the full power of the Epson

commands.

If you have trouble printing italics, change DIP switch 1-3 to OFF to

choose italics instead of character graphics. On the other hand, if you

have trouble printing character graphics, change the printer to IBM

printer emulation mode by setting

DIP

switch l-4 ON and set your

software to match.

WARNING

You must always be careful to set up your printer and software to

match. Although the IBM commands are based on some of the Epson

commands, important differences affect much software. These

differences can cause erratic printing. In particular, line spacing and

page layout are likely to be wrong, and extra characters may appear.

Other DIP switch settings

Appendix D summarizes all the DIP switch settings in a group of

tables. See that appendix for reference and further information.

1-20

Setting Up Your T-750 Printer

Chapter 2

Choosing and Loading Paper

The T-750 printer can accommodate many different sizes and types

of paper, using either its automatic single-sheet loading feature or its

adjustable tractor.

The easy-to-use tractor can handle a wide range of paper widths, and

the automatic single-sheet loading feature handles individual sheets

quickly and easily. For greater efficiency with individual sheets you can

add an optional automatic sheet feeder.

Choosing Paper

Without any accessories, you can use single-sheet paper from 7¼ to

14½ inches wide and continuous paper from 4 to 16 inches wide,

including the perforated edge strips.

Carbon copies

If you use multi-part forms or carbon copies in the T-750, use no

more than three sheets or parts at a time, with a total thickness of no

more than 0.17 mm. Also change the paper thickness setting as

described at the end of this chapter.

Using Single-sheet Paper

The automatic sheet loading feature of the T-750 gives you short

printing times by combining fast loading with fast printing.

If you print large amounts on single sheets of paper, however, you

may find it more convenient to use an automatic sheet feeder. This is

an optional device that holds a stack of paper and inserts a new sheet

whenever required, making single sheets as easy and convenient to use

as continuous paper. The automatic sheet feeder has its own user’s

manual.

Choosing and Loading Paper

2-1

Before you load single-sheet paper the first time, you must prepare

the printer by removing the tractor unit and installing the paper guide,

as described in the next five steps. (If you have previously loaded

continuous-feed paper, you have already done some of the steps.)

Preparing the printer

1. Remove the tractor cover that comes installed on the printer. To

remove it, simply pull the back of the cover toward you until it is

vertical. Then lift the cover up and off the printer.

2. Be sure that you have removed the protective items as described on

page l-2.

3. Remove the tractor unit. Simply press the release levers (shown in

Figure 2-1) with your thumbs, rock the tractor unit back, and lift it

off the printer.

Figure

2-1.

Removing the

tractor unit

4. Move the edge guides on the paper guide to accommodate the

width of the sheet of paper.

2-2

Choosing and Loading Paper

5. Hold the paper guide above the printer. Insert the right hinge tab

into the right tab slot, as shown in Figure 2-2. Next, insert the left

tab into the left slot. When both tabs are in the slots, push the

guide back so that it is horizontal, and then pull it toward you until

it stops at an angle (about 45 degrees).

Figure 2-2.

Installing

the

paper guide

Paper bail lever

Choosing and Loading Paper

2-3

Loading the paper

Now you are ready to load single-sheet paper. Just follow the steps

below:

1. Turn the printer ON first. Do not put the paper in the printer

before you turn it on.

2. Push both the paper release lever and the paper bail lever toward

the back of the printer. (Figure 2-2 shows where these levers are.)

3. Make sure the

ON LINE

light is OF% If it is ON, press the

ON LINE

button once.

4. Place the paper on the paper guide as shown in Figure 2-3 below.

Push the paper firmly into the printer; then let go of it.

Figure 2-3.

Inserting the paper

2-4

Choosing and Loading Paper

5. Pull the paper bail lever forward. This makes the paper feed into the

printer.

6. When the paper stops, push the paper bail lever back.

7. Hold the printer cover vertically and fit the notches in its front

corners over the pins at the front of the printer case (as shown in

Figure 24). Then tilt the cover back into place.

Figure 2-4.

Installing the

printer cover

When you have learned this procedure, you’ll probably leave the

cover on when you load single-sheet paper. If you wish, you can raise

the cover to the vertical position while you’re loading the paper. The

two icons (small pictures) on the printer cover will help you remember

the correct positions of the levers.

Now you are ready to print on single-sheet paper.

Choosing and Loading Paper

2-5

If the paper does not load

If the platen (the black roller) turns but the paper does not load,

remove the paper from the printer and try again, starting at Step 2.

This time press the paper a little more firmly into place.

If nothing happens at all, see that the printer is ON and that the

ON LINE

light is off. Then remove the paper and try again.

Reloading during printing

When you print a document more than one page long using single

sheets of paper, there are two different ways your software can allow

you to load a new sheet at the end of a page.

If your software sends characters in a continuous stream, the printer

stops printing when it reaches the bottom of the paper and sounds

the beeper. When this happens, the

ON LINE

light goes off

automatically.

If your software handles printing page by page, it probably stops

sending characters at the end of a page and prompts you to insert

more paper. In this case the

ON LINE

light probably remains on, and

the first thing you should do is press the

ON LINE

button once to

turn it off.

Once

the

ON LINE

light is off, remove the sheet that has just been

printed and load a new sheet in the same way as before.

Reinstalling the Tractor Unit

When you want to switch from single-sheet to continuous-feed paper,

you need to reinstall the tractor unit.

1. Remove the printer cover.

2. Hold the tractor with the gears to the right and fit the rear notches

on the tractor unit over the rear mounting pins on the printer, as

shown in Figure 2-5.

3. Tilt the tractor unit toward you until the front latches click in place

over the front mounting pins on the printer.

2-6

Choosing and Loading Paper

Figure 2-5.

Reinstalling the tractor unit

Choosing and Loading Paper

2-7

The Paper Thickness Lever

You can adjust the T-750 to accommodate different thicknesses of

paper. You need to do this when you print carbon copies.

Before moving the paper thickness lever, always turn off the power,

open the printer cover or the tractor cover, and move the print head to

the middle of the printer.

The paper thickness lever (shown in Figure 2-6) has six positions.

Figure 2-6.

Paper thickness lever

2-8

Choosing and Loading Paper

If you want to change or check the lever, push it toward the platen

(the black roller) until it stops. This is the first position. Then pull the

lever toward you. You will feel three more click stops. The table below

shows which position you should use.

Table 2-1. Paper thickness lever

positions

Paper Lever

thickness

position

Single

2nd

With 1 copy

3rd

With 2 copies

4th

*Maximum total thickness IS 0.17 mm

Position 1 is for thinner paper, and positions 5 and 6 are for thicker

paper. These positions should rarely be used. If they are, the printing

quality will not necessarily be as good as on paper as specified in the

technical specifications.

Always return the lever to the second position when you resume

printing on normal paper.

Choosing and Loading Paper

2-9

Chapter 3

Using the T-750 with Application Programs

Now that you’ve set up and tested the printer, you need to start

using it with your application programs.

Printer Selection Menus

Most application programs let you specify the type of printer you’re

using so that the program can take full advantage of the printer’s

features. Many programs provide an installation or setup procedure

that presents a list of printers to choose from. The T-750 uses the same

command set as the Epson FX-286e. If the menu does not list this

printer, choose one of the following. They are listed in order of

preference.

FX-86e

EX-1000 or EX-800

FX-286

FX-185 or FX-85

FX-lOO+ or FX-80+

FX-100 or FX-80

Epson printer

Draft printer

If you plan to use the IBM printer emulation mode, choose IBM

Proprinter XL, IBM Proprinter, IBM Graphics printer, or IBM printer,

in that order of preference.

Using the T-750 with Application Programs

3-1

A quick test

After setting up your application program, print a sample document

to be sure the program and the T-750 are communicating properly. If

the document doesn’t print correctly, recheck the program’s printer

selection and installation procedure. If you’re still having trouble

printing, consult the troubleshooting section in Appendix C.

Computer - Printer Communication

Computers and printers communicate by using codes to represent

characters and commands. To be sure the two devices use the same

codes, almost all manufacturers of computers, printers, and software

use the American Standard Code for Information Interchange, which

is usually referred to by its abbreviation, ASCII.

The ASCII standard includes codes for printable characters (letters,

punctuation marks, numerals, and mathematical symbols) and 33 other

codes called control codes. The control codes are for such functions as

sounding the beeper and performing carriage returns. Because the 33

control codes are not enough to control all possible printer functions,

most printer commands are actually a sequence of two or more codes.

One of the 33 control codes, the escape code, signals the beginning

of a sequence of codes. Therefore, most printer commands are

sequences of codes, the first of which is the escape code. This manual

uses the ASCII abbreviation ESC for this code.

When using control codes to select printer functions for an

application program or programming language, check the manual for

the program or language to find the appropriate method of inserting

the code into the program. Further details on the methods to use are in

the rest of this chapter.

Naming and

using commands

The most common way of naming codes or commands is with one of

two numbering systems, decimal or hexadecimal.

3-2

Using the T-750 with Application Programs

The decimal system is the standard numbering system based on units

of ten, using the numerals O-9.

The hexadecimal, or hex, system is based on units of 16 and is often

used by programmers. Instead of using only the numerals 0 through 9,

the hex system also uses the letters A through F. For example, the

decimal numbers 9, 10, 11, and 12 are 09, 0A, 0B, and 0C in hex.

Since the most frequently used hexadecimal numbers are between 0

and FF hex (0 to 255 in decimal), it’s common to write hexadecimal

numbers that are less than 16 with a zero in front, as shown above.

In this book, hex numbers are distinguished from decimal numbers

by the word hex after them (for example, 1B hex). Other common

ways of denoting a hexadecimal number are the following:

1BH $lB &1B &H1B <lB>H

The Command Summary and the Quick Reference card give both

the decimal and hex numbers for each command.

Word Processors

In many ways, word processors demand the most from your printer.

When you create and print a document, you may use many print styles

and fonts, add headers and footers, and use bold, italic, and other

effects.

Once you have installed your word processor by using the list on

page 3-1, you can ordinarily use a fixed set of printer features by using

a word processor command to place markers around the text to be

altered. When the document is printed, the markers are recognized and

translated into suitable commands for your printer. On your screen

some programs show the markers; others display the text as it will

appear-for example, in bold or italics.

This method is normally restricted to features that can be found on

almost all printers, such as bold and underlining.

Some programs also provide a way of placing complete printer

commands in the text. These commands may or may not be visible on

your screen. This method has the advantage of allowing you to use any

printer command, not just a limited set. To make use of it, however,

you need to understand how to use the printer’s commands.

Using the T-750 with Application Programs 3-3

Check the manual for your word processor to see if you can place

printer commands in your text. If this is possible, use the Command

Summary (Appendix A) in this manual to find the command, and use

the manual for your word processor to find how to assign the

command.

If your T-750 is not printing correctly, check both the printer and

your word processor and do the following:

Make sure you’ve selected the correct printer.

Carefully read the printer setup and installation information in your

word processor’s manual.

l Check the printer options that may be part of the installation or

setup section.

Make sure your word processor is capable of sending the proper

commands to your printer.

If you’re still having difficulty printing, check the troubleshooting

section in your word processor’s manual and Appendix C of this

manual.

Spreadsheets

Although spreadsheets seldom use as many printing styles as word

processors, they do have some very specific requirements.

Installation and column width

If your spreadsheet program provides a list of printers, use the list on

page 3-l to find the proper selection. If your spreadsheet doesn’t have a

printer setup routine, carefully read the program’s manual for

information on printing.

A major concern for printing spreadsheets is the width of the printer.

The T-750 is a 136-column printer. You can, however, increase the

number of characters on a line by using one of the modes in Table 3-l.

You can turn on condensed with a button on the control panel (see

SelecType in Chapter l), and the other modes are explained in

Chapter 4.

3-4

Using the T-750 with Application Programs

Table 3-1. Characters per

line

T-750

Normal

136

Elite

163

Condensed

233

Condensed Elite

272

Therefore, if your spreadsheet asks the number of columns your printer

can print, decide which mode you will use and supply the appropriate

number from Table 3-1.

Printer commands

Unlike word processors, spreadsheet programs usually don’t let you

change printer commands within a spreadsheet. Instead, one style or

mode of printing is used for the whole spreadsheet. With the T-750,

there are two main ways of sending commands to control the printing

of a spreadsheet.

First, almost all spreadsheets have the capability of sending

commands to a printer. Look in the manual for your spreadsheet to

find out how to send printer commands. Then look in the Command

Summary (Appendix A) in this manual to find the proper codes to

send.

For example, your spreadsheet might use a “setup string” to send

printer commands. To prepare a setup string for condensed elite, you

would look up the proper command in the Command Summary.

The command for elite is ESC M, and the command for condensed

is SI. because most spreadsheets use the decimal equivalent for the

commands, (also given in the Command Summary), a setup string for

condensed elite might look like this:

/027/077/015

The number 027 is for the escape code, 077 is for M, and 015 is for SI

(condensed).

The second method to choose condensed is one of the SelecType con-

trol panel buttons. The use of this button is described in Chapter 1.

If your spreadsheet is not printing correctly, be sure you have selected

the correct printer if the program asks you to select one.

Using

the T-750 with Application Programs

3-5

If you’re using the program’s print facility, recheck the T-750’s

Command Summary to make sure you’re sending the correct

commands.

If you’re still having difficulty printing, check the troubleshooting

section in your spreadsheet program’s manual or Appendix C of this

manual.

Graphics Programs

The T-750 is capable of producing finely detailed graphic images.

Although Chapter 5 gives specific information on the graphics

commands, the easiest way to take advantage of the printer’s

capabilities is with one of the many graphics programs available.

When buying graphics software, always make sure it has a suitable

option to allow printouts on Epson FX series printers. Any program

with an option for Epson FX series printers should give excellent

results, using different dot densities to produce a realistic scale of grays.

Most graphics programs have a printer selection procedure, in which

case you should check the list on page 3-l to find the proper selection.

Programming Languages

Most users rely on application programs to send commands to the

printer. An awareness of programming languages, however, can be

helpful in exploring a printer’s potential or troubleshooting a printing

problem.

For example, if you want to set up your application program to send

a command for italic printing, you can use a programming language,

such as BASIC or Pascal, to do a quick printout before setting up the

program.

If, on the other hand, you’ve set up a program to send a certain

command to the printer, but it’s not printing correctly, you can send

the same command with a programming language to find whether the

problem lies with your application program, the command, or the

printer.

3-6

Using the T-750 with Application Programs

Sending printer commands with BASIC

You can send printer commands with any programming language.

The examples in this manual are written in BASIC, because BASIC is

included with most computer systems.

In most forms of BASIC, and in particular Microsoft@ BASIC, the

normal method of producing printed output is to use the LPRINT

statement followed by the text to be printed enclosed in quotation

marks, as shown below:

100 LPRINT "This text will be printed."

Individual printer control codes can be sent by using the CHR$

function with the LPRINT statement:

100 LPRINT CHR$(27);CHR$(69);

This line sends ASCII codes 27 and 69 to the printer, selecting

emphasized printing.

Most versions of BASIC permit the ASCII codes in the CHR$

function to be given in either decimal (as above) or hexadecimal. Also,

if the code corresponds to a printable character, the character itself can

be used in quotation marks in the LPRINT statement. The command

shown above could therefore be given in two other forms:

LPRINT CHR$(27);"E"

LPRINT CHR$(&H1B);CHR$(&H145)

As you can see, Microsoft BASIC uses &H to denote hexadecimal

numbers.

If you have another version of BASIC or a different programming

language, consult the manual for the language to find the correct

formats for these commands.

Using the

T-750

with Application Programs

3-7 I

Chapter 4

T-750 Printer Features

You can obtain many different printing effects with the T-750 printer,

from arranging the printout on the paper to giving extra emphasis to

particular words and phrases. This chapter shows you the features you

may want to select with your software. Once you have read about the

features, you can find their commands in the Command Summary.

SelecType, as you know, controls the printing style of a whole

document. Software commands, on the other hand, can change

anything from a single character to the entire document.

Quality and Fonts

The most fundamental changes you can make to printing on the

T-750 are in the print quality and NLQ fonts.

The printer has two levels of print quality: draft and NLQ (Near

Letter Quality). Draft printing is fast, making it ideal for drafts and

other preliminary work. NLQ printing takes a little longer, but it

produces more fully-formed characters for presentation-quality

documents.

The printout below shows the differences between draft, NLQ

Roman, and NLQ Sans Serif so that you can compare the different

styles and densities:

D r a f t p r i n t i n g i s e x t r e m e l y f a s t .

NLQ Roman is clear and t y p e w r i t e r - l i k e .

NLQ Sans Serif is crisp and distinctive.

SelecType gives you an easy way of changing the print quality and

NLQ font, but if you prefer to print in NLQ Roman most of the time,

you can select it with a DIP switch (see Appendix D). You can also

choose the print quality and NLQ font with software commands.

T-750 Printer Features

4-1

Print Size and Character Width

To add greater variety to your documents, the T-750 has two pitches

as well as proportional spacing and condensed, double-wide and

double-high printing. All can be selected with a software command,

and condensed can be selected with SelecType.

Pitches and Proportional Spacing

The two pitches are pica and elite. Pica is 10 characters per inch (cpi)

and elite is 12 cpi. The printout below shows the difference between the

two.

Pica: ABCDEFGHIJKLMnopqrstuvwxyz

Elite: ABCDEFGHIJKLMnopqrstuvwxyz

Another mode is proportional. In this mode the width of the

characters varies. Therefore, a narrow letter like i receives less space

than a wide letter like W, as you can see in the printout below:

Pica: ABCDEFGHIJKLMnopqrstuvwxyz

Proportional: ABCDEFGHIJKLMnopqrstuvwxyz

The character tables in Appendix B list the widths of all proportional

characters.

Double-wide, double-high, and condensed

In addition to the basic pitches and the proportional mode, the

T-750 offers three other modes that change the size of your printing.

These modes are double-wide, double-high, and condensed.

The double-wide mode doubles the width of any size of characters.

This mode is useful for such purposes as emphasizing headings in

reports and making displays, but is usually not suitable for large

amounts of text.

D o u b l e - w i d e p i c a

D o u b l e - w i d e e l i t e

4-2

T-750 Printer Features

Another mode for headings and other special uses is double-high,

which is shown below.

This is double-high printing

Because of its height you must leave a blank line above a line of

double-high. Otherwise the double-high letters will overlap the letters

on the previous line.

Pica and elite can be reduced to about 60% of their normal width

with the condensed mode. This mode is particularly useful for printing

wide spreadsheets because condensed elite allows you up to 272

characters per line on wide computer paper.

Condensed can be selected with SelecType, by setting a DIP switch

(see Appendix D), or with a software command. Even if you turn

condensed on with the DIP switch, you can still turn it off with

SelecType or the software command.

Condensed pica gives more characters on a line.

Condensed elite gives you even more.

Widening or narrowing the characters also widens or narrows the

spaces between words and letters. Because word processors usually

create a left margin by printing spaces, you may need to change the

number of characters on a line to keep the margins correct if you

change widths. For example, a left margin of five pica characters is the

same as one of six elite characters.

Special Effects and Emphasis

The T-750 offers two ways of emphasizing parts of your text and also

allows you to use underlining, superscripts, and subscripts. These

features can be controlled only by software commands, but many

application programs can produce them if they are properly installed.

Emphasized and double-strike modes both slow the printer down

slightly to produce bolder text. In emphasized mode, the T-750 prints

each character twice as the print head moves across the paper, with the

second slightly to the right of the first. This produces darker, more

fully-formed characters.

T-750

Printer

Features

4-3

In double-strike mode, the T-750 prints each line twice, with the

second slightly below the first. This makes the characters bolder. While

NLQ is in use, however, double-strike is ignored because NLQ

characters are already formed by two passes of the print head.

This is normal NLQ printing

This is emphasized NLQ printing

Superscripts and subscripts are valuable for such purposes as printing

footnote numbers or parts of mathematical formulas, and the underline

mode provides an automatic way of underlining fully any piece of text.

It underlines spaces, subscripts, and superscripts without a break.

The example below shows underlining with text and combined with

superscripts and subscripts in a mathematical formula.

average = (a1 + a2 + . . . . . + an)

Using Different Character Sets

The T-750 incorporates a new character set: Epson Character

Graphics. This set allows you to take advantage of the power of the

Epson mode commands and still print out the character graphics used

by IBM and compatible computers and by much application software.

For example, if your word processor can include the characters to draw

boxes and shade areas, you can produce some very professional effects.

You can select the Epson Character Graphics set with your software

or by setting DIP switch l-3 ON. For many applications it is best to use

the DIP switch instead of the software command because the character

graphics are then available as soon as you turn the printer on.

4 - 4

T-750 Printer Features

The other important change you can make to the standard character

set is to change some characters for ones commonly used in other

languages-chiefly European and Scandinavian-such as accented

characters and symbols. In Epson mode, eight international character

sets can be selected by setting DIP switches l-6 to l-8: USA, French,

German, UK, Danish, Swedish, Italian, and Spanish. See Appendix D

for the DIP switch settings.

In Epson mode, these eight, and five more, can also be selected by a

software command. The additional character sets are the following:

Norwegian, a second Danish set, Japanese, a second Spanish set, and

Latin American. A complete list of these characters is in Appendix B.

Also, all text characters can be printed in italics in Epson mode. You

can use this typestyle for special emphasis or as an alternative typeface.

I t a l i c s g i v e e m p h a s i s t o w o r d s .

They are an attractive alternative style.

Page Layout and Other Commands

The remaining commands in the Command Summary are not

normally needed when using application software. You may need some

of them if you are using a printer installation program provided with

an application package, but most deal with features (such as tabs,

margins, and line spacing) that are provided directly by application

programs and are therefore only useful to you if you want to program

the printer using a programming language such as BASIC.

T-750 Printer Features

4-5

Chapte r 5

Graphics and User-defined Characters

The dot graphics mode allows your T-750 to produce pictures,

graphs, charts, or almost any other pictorial material you can devise,

and the user-defined character feature allows you or an application

program to put special characters in the printer’s memory so that it can

print them just as if they were ordinary letters.

because many application programs use graphics, you may be able to

print pictures and graphs like the ones on this page and the next by

simply giving your software a few instructions.

The quickest and easiest way to print graphics on your T-750 is to

use an application graphics program. With such programs you usually

create an image on your monitor and then give a command to send

the image to the printer.

Graphics and User-defined Characters

5-1

If you use application software that produces graphics, all you need

to know about dot graphics is how to use the software. If, on the other

hand, you wish to do your own programming or merely wish to

understand how the T-750 prints graphics, read on.

The Print Head

To understand dot graphics you need to know a little about how the

T-750’s print head works.

The printer’s print head has nine pins. As it moves across the page,

electrical impulses cause the pins to fire. Each time a pin fires, it strikes

the inked ribbon and presses it against the paper to produce a small

dot. As the head moves across the paper, the pins fire time after time in

different patterns to produce letters, numbers, or symbols.

5-2

Graphics and User-defined Characters

Dot patterns

The T-750’s print head is able to print graphics in addition to text

because graphic images are formed on the printer about the same way

that pictures in newspapers and magazines are printed.

If you look closely at a newspaper photograph, you can see that it is

made up of many small dots. The T-750 also forms its images with

patterns of dots, as many as 240 dot positions per inch horizontally and

72 dots vertically. The images printed by the T-750 can, therefore, be as

finely detailed as the one on the first page of this chapter.

In its main graphics mode the T-750 prints one column of dots for

each code it receives, and it uses only the top eight of the nine pins.

Therefore, your graphics program must send codes for dot patterns,

one number for each column in a line. For each of those columns the

print head prints the pattern of dots you have specified.

To print figures taller than eight dots, the print head makes more

than one pass. The printer prints one line, then advances the paper

and prints another, just as it does with text.

To keep the print head from leaving gaps between the graphics lines

as it does between the text lines, the line spacing must be changed to

eliminate the space between lines. With a change in line spacing, the

T-750 can print finely detailed graphic images that give no indication

that they are made up of separate lines, each no more than 8/72nds of

an inch tall.

Each pass of the print head prints one piece of the total pattern,

which can be as tall or short and as wide or narrow as you desire. You

don’t have to fill the whole page or even an entire line with your

graphics figures. In fact, you can use as little or as much space as you

like for a figure and put it anywhere on the page.

Pin Labels

The graphics mode requires a method to tell the printer which pins

to fire in each column. Since there are 256 possible combinations of

eight pins, you need a numbering system that allows you to use a single

number to specify which of the 256 possible patterns you want. This

numbering system is shown in Figure 5-1 on the next page.

Graphics and User-defined Characters

5-3

To fire any one pin, you send its number. To fire more than one pin

at the same time, add up the numbers of the pins and send the sum to

the printer. Therefore, with these labels for the pins, you fire the top

pin by sending 128. To fire the bottom pin, you send 1. If you want to

fire only the top and bottom pins, you simply add 128 and 1, then

send 129.

By adding the appropriate label numbers together, you can fire any

combination of pins. Figure 5-1 shows three examples of how to

calculate the number that fires a particular pattern of pins.

Figure 5-1.

Pin numbering system

With this numbering system, any combination of the eight pins adds

up to a decimal number between 0 and 255, and no numbers are

duplicated. Before you can put these numbers in a graphics program,

however, you need to know the format of the graphics commands.

Graphics Commands

The graphics mode commands are quite different from most other

commands. For most of the other modes, such as emphasized and

double-wide, one command turns the mode on and another turns it

off. For graphics, the command is more complicated because the

command that turns on a graphics mode also specifies how many

columns of graphics will be printed. After the printer receives this

command, it interprets the next numbers as pin patterns and prints

them on the paper.

5-4

Graphics and User-defined Characters

The graphics command format

There are several different graphics commands giving different

horizontal dot densities and printing speeds. Because the format is

almost the same for all the commands, however, the example here

keeps things simple by using only the single-density graphics command,

ESC K. In single-density graphics, there are 60 dots per inch

horizontally.

The command to enter single-density graphics mode is ESC K nl n2.

In BASIC the command is given in this format:

LPRINT CHR$(27);"K";CHR$(n1);CHR$(n2);

ESC K specifies single-density graphics, and the next two numbers

(n1 and n2) specify th

number of columns reserved for graphics.

Column reservation numbers

Even in single-density graphics mode, one 8-inch line can

accommodate 480 columns of graphics; in quadruple-density, almost

2000 columns can fit on the same 8-inch line. Since the printer does

not use decimal numbers larger than 255, the graphics commands use

two numbers for reserving columns.

Because the commands are set up for two numbers, you must supply

two even if you need only one. When you need fewer than 256

columns, it is easy to determine

and n2: nl is the number of

columns you are reserving and n2 is zero. For example, to send data for

200 columns of graphics, n1 is 200 and n2 is 0.

For more than 256 columns of graphics data, n2 is the number of

complete groups of 256 columns, and nl is the number of columns to

complete the line. For example, to send 1632 columns of graphic data,

n1 is 96 and n2 is 6 because 96 + (6 x 256) = 1632.

You can calculate both nl and n2 by dividing the total number of

columns by 256. The quotient is n2 and the remainder is n1. If you are

using a programming language with MOD (modulus) and INT (integer)

functions, you can use the following formulas, in which n is the total

number of columns.

n1 = n

MOD 256

n2 = INT (n/256)

Graphics and User-defined Characters

5-5

Graphics data

After receiving a graphics command such as ESC K nl n2, the

printer prints the number of codes specified by nl and n2 as graphics

data, no matter what codes they are. This means that you must be sure

to supply exactly the right amount of graphics data. If you supply too

little, the printer will stop and wait for more data and will seem to be

locked. The next data sent will then be printed as graphics, even if it is

really text. On the other hand, if you supply too much graphics data,

the excess will be printed as regular text.

Simple Graphics Programming

The first example in this section shows how a graphics command,

column reservation numbers, and data can be used to print a single

line of graphics. The example is a BASIC program. If you prefer

another programming language, the principles are exactly the same.

Therefore, you can easily adapt the program to the language you prefer.

The first line of the program specifies single-density graphics for 40

columns:

100 LPRINT CHR$(27);"K";CHR$(40);CHR$(0);

The second line is the data that is printed as pin patterns. It uses the

number 74 to produce one of the patterns shown in Figure 5-1. The

FOR-NEXT loop sends 40 columns of data.

200 FOR X=1 TO

40:

LPRINT CHR$(74);: NEXT X

That is the whole program. In BASIC, semicolons at the ends of the

lines are very important; they prevent the computer from sending

other codes after the ones you specify. In other languages you may have

to use a special command to send a single code at a time. Run the

program to see the result below. Although it is not as interesting as the

examples at the beginning of this chapter, it shows exactly how the

mode works.

5-6

Graphics and User-defined Characters

WIDTH statements

Some software (including most versions of BASIC) automatically

inserts carriage return and line feed codes after every 80 or 130

characters. This is usually no problem with text, but it can spoil your

graphics. Two extra columns of graphics are printed in the middle of

the ones you send, and are left over and printed as text.

In some versions of BASIC you can prevent unwanted control

codes in graphics by putting a WIDTH statement at the beginning of

all graphics programs. The format in many forms of BASIC is either

WIDTH “LPT1:“, 255 or WIDTH LPRINT 255. Check your software

manual for the proper format.

Printing taller patterns

The next example shows how several lines of graphics can be formed

into a figure taller than eight dots. It uses programming techniques for

producing textured or repetitive patterns.

The program is listed below. The lines inside each pair of FOR and

NEXT statements have been indented so that you can see how the

program works; the spaces are not needed for the program to run.

100 WIDTH "LPT1:", 255

110 LPRINT CHR$(27);"A";CHR$(8);

120 FOR R = 1 TO 6

130 LPRINT CHR$(27);"K";CHR$(100);CHR$(0);

140

FOR X = 1 to 50

150

LPRINT CHR$(170);CHR$(85);

160

NEXT X: LPRINT

170 NEXT R

180 LPRINT CHR$(27);"@"

If you run the program, you will see how it combines six print lines

into a pattern.

There are five basic steps that the program goes through to produce

this kind of pattern.

Graphics and User-defined Characters

5-7

1. The computer is prevented from adding any extra characters by the

WIDTH statement (line 100).

2. The line spacing is changed to 8/72 of an inch-the height of the

dot patterns used in the program (line 110).

3. The program goes through the graphics commands the required

number of times (lines 120 and 170).

4. A new graphics command is used for each line printed (lines

130-160). This part of the program is similar to the last example, but

two columns are printed each time through the loop making a total

of 100.

5. The last important thing to do is to reset the printer to its default

settings, including the normal line spacing (line 180).

Notice that the graphics command (ESC K) can be in effect for only

one print line. To print more than one line of graphics, the graphics

command must be issued before each line.

Density Varieties

Although all the examples so far in this chapter have been in the

single-density graphics mode, there are six other eight-pin densities and

two that use all nine pins. Nine-pin graphics is not necessary for most

uses, but you can find the command (ESC ^) in the Epson mode

command summary.

The four most common eight-pin modes are available in both Epson

and IBM printer emulation modes. Their commands are ESC K,

ESC L, ESC Y, ESC Z. In Epson mode, there is also a general-purpose

command for any of the eight-pin graphics modes: ESC *. This

command is used in the same way as the individual commands, except

that before nl and n2 you must send the code for the graphics mode

required. The different modes are summarized in the table on the next

Page.

The following example shows how to use the ESC * command to

reserve 40 columns for single-density graphics. This uses mode number

0 from the table to achieve exactly the same effect as the first example

using ESC K.

LPRINT CHR$(27);"*";CHR$(0);CHR$(40);CHR$(0);

5-8

Graphics and User-defined Characters

Table 5-1.

Graphics

modes

*Adjacent dots cannot be printed in this mode.

Modes 4-7 in the table are special modes that alter the horizontal

density to give proportions of a computer monitor (the CRT modes),

or to match the vertical density so as to give round circles (the plotter

modes).

In two modes, high-speed double-density and quadruple-density, the

print head cannot print two consecutive dots with the same pin, so

that it can print dots in only half the possible dot positions in any one

row. The higher density means that the resolution of the pattern is

better than in single-density mode. When you design patterns in these

two modes, however, you must see that no dots overlap.

Reassigning a graphics mode

Another graphics command lets you assign a different eight-pin

graphics mode to one of the specific eight-pin graphics commands. You

can use it with graphics software programs to quickly change the

density and proportions of your printouts. Changing the graphics

option changes the width without changing the height.

The command for reassigning a graphics mode is ESC ? c m. In this

command, c is a letter designating one of the four alternate graphics

codes (K, L, Y, or Z) and m is the mode number of the new mode, as

listed in Table 5-1.

For example, to change the ESC K command to select the CRT I

screen graphics mode, the command in BASIC would be the following:

LPRINT CHR$(27);"?K";CHR$(4);

Graphics and User-defined Characters

5-9

A little experimentation should tell you whether the reassigning code

can improve your graphics printouts.

Designing Your Own Graphics

This section takes you through the development of a graphics

program. The example is not especially complicated, but it does include

the same steps you would use for a more complex figure.

You should plan your figure with dots on graph paper, but before

beginning to place the dots, you must decide which graphics density

you want. Figure 5-2 shows the differences between three common

modes so that you can choose the one you want.

In this figure you can see the main rules for graphic design in the

three densities:

In single-density no dots can be placed on vertical lines.

In high-speed double-density, dots can be placed on vertical lines, but

no dots can overlap.

In low-speed double-density, dots can be placed on vertical lines, and

they can overlap.

Figure 5-2.

Designing

different densities

Single

High-speed

Low-speed

double double

5-10

Graphics and User-defined Characters

Now look at the high-speed double-density design in Figure 5-3. It

should point you in the right direction for your own work.

Figure 5-3.

Arrow design

After plotting the dots on a grid, you calculate the numbers for each

pin pattern by dividing the design grid into separate print lines. For the

arrow design, the grid was divided into two lines, each seven dots high.

Then each column was examined to calculate the graphics data. The

results for the first line are shown in Figure 5-4. The pin values are on

the left and the sums at the bottom of each column.

Figure 5-4.

Calculating data

128

Graphics and User-defined Characters

5-11

The numbers for the second line were calculated in the same way.

Once the numbers for the pin patterns are calculated, they are put in

the program in DATA statements, separated by commas.

The program works in a similar way to the last example. This time it

selects 7/72-inch line spacing because only seven pins are used. Because

the data is not repetitive, each column of graphics data is read from the

DATA statements and sent to the printer. The design is 41 dot

positions wide. Therefore both lines 130 and 140 use the number 41.

100 WIDTH "LPT1:", 255

110

LPRINT CHR$(27);"A";CHR$(7);

120

FOR ROW = 1 TO 2

130

LPRINT CHR$(27);"Y";CHR$(41);CHR$(0);

140

FOR COLUMN = 1 TO 41

150

READ N

160

LPRINT CHR$(N);

170

NEXT COLUMN

180

LPRINT

190

NEXT ROW

200

END

210

DATA 64,32,80,8,68,2,64,0,64,0

220

DATA 64,0,64,0,32,0,16,0,8,0

230

DATA

8,0,8,0,8,0,8

0,8,0,8,0,8,0

240 DATA 184,64,32,16,8,4,2

250 DATA 8,16,40,64,136,0,8,0,8,0

260

DATA 8,0,8,0,16,0,32,0,64,0,64,0

270

DATA 64,0,64,0,64,0,64,0,64,0,64,0

280 DATA 116,8,16,32,64,128,0

When you run this program, it produces the following printout:

If you want to see the figure in other densities, change the Y in line

130 to L or 2.

5-12

Graphics and User-defined Characters

User-defined Characters

The T-750 has a command that allows you to define and print

characters of your own design. You can design an entirely new

alphabet or typeface, create mathematical or scientific symbols, or

create graphic patterns to serve as building blocks for larger designs.

These user-defined characters work only in draft mode.

Also, you can buy application programs that assist you in creating

characters or supply you with sets of characters already created. In

addition, some popular application packages make use of the

user-defined character function to enhance printouts. (These characters

are called download characters in some programs.)

The printout below shows a few user-defined characters to give you

an idea of what can be done, but remember that you can create what

you need or want.

When you define a character of your own, the definition is stored in

temporary memory (RAM). The original character with the same code

remains in the printer’s permanent memory (ROM) and you can print

either of them when needed.

Design grids

The process of defining a character is much like printing dot graphics

because you send the printer precise instructions on where you want

each dot printed. In fact, planning a user-defined character is like

planning a small dot graphics pattern.

To design a character you use a grid that has nine rows and eleven

columns. Figure 5-5 on the next page shows three of these grids. Most

characters do not use the two rows below the heavy line. Those rows

are only for characters with descenders, like y and g. Also, even

though you can use up to 11 columns, it is best to leave the last two

blank for the space between characters.

The grid in the middle of Figure 5-5 shows a plan for a character.

Although there are nine pins in the T-750 print head, you can use only

eight of them in a single user-defined character. The design in

Graphics and User-defined Characters

5-13

Figure 5-5 uses the top eight, but you can also use the bottom eight by

using the grid on the right as explained later in this section.

Once the character is planned on the grid, you simply add the pin

values for each column together, just as you do for graphics. Then, the

next step in defining a character is to send this information to the

printer.

Figure 5-5.

Design grids

128

1 2 3 4 5 6 7 6 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

128

Sending the character definition

The command to define characters is complex:

ESC & 0 n1 n2 a1 dl . . . d n

You can define more than one character with a single command.

The values nl and n2 are the ASCII codes of the first and last

characters you are defining. If you are defining only one character, nl

and n2 are the same. You can use any codes between 32 and 127 or 161

and 254 decimal for nl and n2, but it is best not to define decimal 32,

which is the code for a space. You can also use other codes by using the

ESC 6 and ESC I commands (see the Command Summary).

An example will show how to specify

and n2. If, for instance, you

want to redefine the characters A to Z, nl is A (or ASCII code 65) and

n2 is Z (or ASCII code 90). So the command ESC & 0 AZ (followed

by the appropriate data) would replace the entire alphabet of capital

letters.

5-14

Graphics and User-defined Characters

Following the specification of the range of characters to be defined in

this command is one number (al) that specifies the width of the

character and whether it uses the top eight pins or the bottom eight

pins.

The last part of the character definition is the actual data that

defines the dot patterns for each column of each character. Since a

character can use up to eleven columns, you must supply eleven data

numbers for each character even if some of the columns are blank.

An example character definition program should make the process

clear:

100 LPRINT CHR$(27);"x0";

110 LPRINT CHR$(27);"&";CHR$(0);

120 LPRINT "@@";

130 LPRINT CHR$(136);

140 FOR I = 1

150

READ A: LPRINT CHR$(A);

160 NEXT I

170 LPRINT "@ @ @ @ @"

180 LPRINT CHR$(27);"%";CHR$(1);

199 LPRINT "@ @ @ @ @"

200 LPRINT CHR$(27);"%";CHR$(0);

218 LPRINT "@ @ @ @ @"

220 END

230 DATA 32,80,168,84,42,84,168,80,32,0,0

In line 100, the ESC x 0 command selects draft style printing. The

actual character definition starts in line 110. The two at signs (@) in

line 120 are nl and n2, the range of characters being defined (in this

case, a range of one). Line 130 contains al.

The information about the character design (which is contained in

the data statements at the end of the program) is sent to the printer in

the loop between lines 140 and 160.

This example program defines a heart and places it in the area of

RAM reserved for ASCII code 64, which corresponds to the at sign in

the characters in the ROM. The next part of the program (lines

170-210) prints out a three-line sample. The first and third lines contain

at signs; the second line contains the heart that was defined.

Graphics and User-defined Characters

5-15

Run the program to see the printout below:

As you can see, both sets of characters (the original ROM characters

that the printer normally uses and the user-defined character set)

remain in the printer available for your use. The command to switch

between the two sets is used in lines 180 and 200 and has the following

format:

ESC % n

If n is 0, the normal ROM character set is selected. (This is the

default.) If n is 1, the user-defined character set is selected.

You can switch between character sets at any time, even in the

middle of a line. To try it, place semicolons at the end of lines 170 and

190 in the program above.

Copying ROM to RAM

After running the program above, if you select the user-defined

character set and try to print other characters, the only one that will

print is the heart. If you send the code for a character that is not

defined, it is printed as a space.

In many cases, you will want to redefine only a few of the characters,

leaving the rest of the alphabet as it is. As you have seen, it is possible

to switch back and forth between the normal character set and the

user-defined character set. Normally, it is more convenient to copy all

of the standard characters from ROM to the area of RAM that holds

the user-defined character set. The format of the command to do this is

as follows:

ESC : 0 0 0

If you use this command at the beginning of a program, then define

the special characters you want to change, you can then select the user-

defined character set and use it as your normal character set. There is

then no need to switch back and forth between sets.

5-16

Graphics and User-defined Characters

Note

This command will cancel any user-defined characters you have

already created. You must send this command to the printer before you

define characters.

Specifying

the

width and height

The example program uses 136 for al (in line 130 of the definition

program), but you can use other values. The number al specifies two

things: the width of the character and its position on the grid. The

width is used when the character is printed in proportional mode.

If you want a character to use the bottom eight pins, use the third

grid in Figure 5-5.

A value of 136 is suitable for all characters that use the top eight pins

and start in column 1 and finish in column 9. For a character the same

width, but printed with the bottom eight pins, al should be 8. For any

other character follow these rules to calculate al:

1. If you design a character narrower than nine columns, you can

balance the number of empty columns on either side with the

following method: Starting with a1 equal to 8, subtract 1 for every

blank column on the right and add 16 for every blank column on

the left.

2. If the character should be printed with the top eight pins, add 128.

For example, if a character uses the top eight pins and starts in

column 3 and ends in column 7, the calculation is as follows:

l start with al = 8

l subtract 2 for two blank columns on the right, giving al = 6

l add 32 for two blank columns on the left, giving al = 38

l add 128 to print with the top eight pins, so that al = 166.

Mixing print styles

The user-defined characters can be used in combination with most

print styles (except NLQ, of course). For example, emphasized and

double-wide work well with user-defined characters.

Graphics and User-defined Characters

5-17

The sample below shows the heart character printed in two different

styles.

Other considerations

Keep in mind that user-defined characters are stored in RAM, which

is not permanent. Whenever the printer power is turned off or your

computer sends an initialization (INIT) signal, all of the user-defined

characters are lost. For example, some computers send an INIT signal

each time BASIC is loaded or when certain application programs start

up, and most computers do it if you have to reset them. If the program

resets the printer with the ESC @ command, the ROM set is selected,

but the user-defined characters are not lost.

The IBM printer emulation mode has a different method of defining

characters. See page A-45 in the Command Summary if you are

interested.

5-18

Graphics and User-defined Characters

Appendix A

Command Summary

This appendix lists and describes all the commands, both Epson

(ESC/P) mode and IBM printer emulation mode, available on the T-750.

The first part of this appendix lists all commands in numerical order

and gives the page number where each is fully described. If you know

which command you are looking for, consult the numerical list to find

the page number where it is described.

The Quick Reference card at the end of the book also contains a list

of the commands divided by topic, with page number references that

direct you to full explanations of the commands. The numerical list

and the Quick Reference card also show the differences between the

Epson mode and the IBM printer emulation mode.

The second part of this appendix lists and describes Epson mode

commands and IBM printer emulation mode commands separately; the

commands are divided into the following subjects:

Printer Operation

Data Control

Vertical Motion

Horizontal Motion

Overall Printing Style

Print Size

Print Enhancement

Word Processing

Character Sets

User-defined Characters

Graphics

Each command has a format section and a comment section. The

format section gives the ASCII, decimal, and hexadecimal values for

the command; the comment section describes the effect of the

command and gives any additional information necessary for using it.

All three formats are equivalent, and it should be easy to pick the

one most suited to your purpose.

Note

Some application programs can use control key sequences. See the

Control Key chart on page A-3 for information on using these.

Command Summary

A-1

For the following commands that use only 0 or 1 for the variable,

either the ASCII codes 1 and 0 or the characters

and 0 can be used:

ESC

ESC U, ESC

ESC

ESC W, ESC S, ESC

- , and

ESC %

For example, in BASIC you can turn on double-wide with either of

these statements:

LPRINT CHR$(27);"W";CHR$(1)

LPRINT CHR$(27);"W";"1"

The simplest type of command consists of a single character to be

sent to the printer. For instance, to print in condensed mode the code

format is:

ASCII code : SI

Decimal:

Hexadecimal: 0 F

This code can be sent from a program by sending the code 15 directly

More complex commands consist of two or more character codes.

For example, to print in proportional mode the code format is the

following:

ASCII code:

ESC

Decimal:

112 n

Hexadecimal:

1B 70 n

In this case n can be either 1 or 0, to begin or end proportional

printing. You can use either of the following commands to turn ON

proportional print from BASIC:

LPRINT CHR$(27);CHR$(112);CHR$(1)

LPRINT CHR$(27);“p”;CHR$(1)

A-2

Command Summary

Control key chart

Some application programs can use control key codes for decimal

values O-27. The table below gives you the proper values. The Control

Key column indicates that you press the control key at the same time

you press the key for the letter or symbol in that column. For example,

you press the control key and A at the same time to send the value 1.

Some programs that use this system cannot use control-@, and

many programs use the control keys for other purposes.

Dec.

Hex.

Control Key

[

Command Summary

A-3

Commands in Numerical Order

This section lists all the T-750 commands, with their decimal and

hexadecimal values. The numbers in the columns on the right are the

paged numbers in this appendix where a complete description of the

command can be found. If the Epson and IBM printer emulation mode

page numbers are the same, the command is the same in both modes

and is described only in the Epson mode section.

BEL

Beeper

8 08 Backspace

9 09 Tab horizontally

10 0A Line feed

11 0B Tab vertically

FF 12 0C Form feed

0D Carriage return

0E Select double-wide (1 line)

S I 15 0F Select condensed mode

DC1

17 11

Select printer

DC2

Cancel condensed mode

DC2

Cancel condensed/elite

DC3

Deselect printer

DC4

Cancel double-wide (1 line)

CAN

Cancel line

DEL 127 7F Delete character

ESC SO 14 0E Select double-wide (1 line)

ESC SI 15 0F Select condensed mode

ESC EM 25

19 Automatic sheet feeder on/off

ESC SP

Set intercharacter

space

ESC !

Master select

ESC #

Cancel MSB control

ESC $

24 Set absolute print position

ESC %

37 25

Select user-defined set

ESC &

38 26 Define user-defined characters

ESC *

2A Select graphics mode

ESC -

45 2D Turn underlining on/off

A-11 A-11

A-1 9 A- 19

A-20 A-20

A-14 A-14

A-17 A-17

A-13 A-13

A-12 A-12

A-24 A-24

A-23 A-23

A-7 A-7

A-24

A-42

A-8

A-25 A-25

A-12 A-12

A-12

A-24 A-24

A-10

A-29

A-22

A-11

A-19

A-31

A-3 1

A-34

A-28 A-28

A-4

Command Summary

ESC /

ESC 0

ESC 1

ESC 2

ESC 3

ESC 4

ESC 5

ESC 6

ESC 7

ESC 8

ESC 9

ESC :

ESC <

ESC =

ESC >

ESC ?

ESC @

ESC A

ESC B

ESC C

ESC CO

ESC D

ESC E

ESC F

ESC G

ESC H

ESC I

2F Select vertical tab channel

A-18

Select l/&inch line spacing A-15 A-15

Select 7/72-inch line spacing

A-15 A-15

Select l/6-inch line spacing

A-15

50 32

Select programmable line spacing A-38

Select n/216-inch line spacing

A-16 A-16

34 Select italic mode A-30

Set top of form

A-38

Cancel italic mode

A-30

Turn automatic line feed on/off A-39

36 Printable code area expansion A-32

54 36

Select international character set

A-43

55 37

Cancel ESC 6

A-32

Select standard character set

A-43

56 38

Disable paper-out sensor

A-9 A-9

39 Enable paper-out sensor

A-9 A-9

3A Copy ROM into RAM

A-31

3A Select elite pitch

A-41

3C Select unidirectional mode (l-line) A-8

Set MSB to 0

A-10

3D Define user-defined characters A-45

62 3E

Set MSB to 1

A-11

63 3F Reassign graphics mode

A-35

64 40 Initialize printer A-7

Select n/72-inch line spacing A-16

65 41

Set n/72-inch line spacing A-37

66 42

Set vertical tabs A-17 A-17

67 43

Set page length in lines

A-13 A-13

Set page length in inches

A-13 A-13

68 44

Set horizontal tabs A-21 A-40

Select emphasized mode

A-26 A-26

70 46 Cancel emphasized mode

A-26 A-26

Select double-strike mode

A-26 A-26

Cancel double-strike mode

A-27 A-27

49 Printable code area expansion A-32

Select font

A-40

Command Summary

A-5

ESC J

4A Perform n/216-inch line feed

A-16 A-38

ESC K 75 4B Select singledensity graphics A-33 A-33

ESC L

76 4C Select double-density graphics

A-33 A-33

ESC M 77 4D Select elite pitch

A-23

ESC N 78 4E Set skip-over-perforation A-14 A-14

E S C 0 79 4F Cancel skip-over-perforation A-14 A-14

ESC P 80 50 Select pica pitch

A-22

ESC P 80 50 Turn proportional on/off

A-41

ESC Q 81 51 Set right margin A-18

ESC Q22 81 51 Deselect printer

A-37

ESC R 82 52 International character set

A-30

ESC R

52 Restore default tab settings A-40

ESC SO 83 53 Select superscript mode A-27 A-27

ESC Sl 83 53 Select subscript mode A-27 A-27

ESC T 84 54 Cancel superscript/subscript A-27 A-27

ESC U

55 Turn unidirectional mode on/off A-9 A-9

ESC W 87 57 Turn double-wide on/off A-25 A-25

ESC X

ESC Y

ESC Z 90 5A

ESC [@ 91 5B

ESC \ 92 5C

E S C 1

92 5C

ESC ^ 94 5E

ESC _ 95 5F

ESC a

ESC b

ESC k 107 6B

ESC 1

108

ES C

112

ESC s

115

ESC t

116

ESC w

119 77

Set left and right margins

High-speed dbl-density graphics

Quadruple-density graphics

Turn double-high on/off

Set relative position

Print characters from symbol set

Select 9-pin graphics

Print 1 character from symbol set

Turn overscore on/off

NLQ justification

Set vertical tabs in channels

Select NLQ font

Set left margin

Turn proportional mode on/off

Turn half-speed mode on/off

Select character table

Turn double-high on/off

A-39

A-33 A-33

A-3 4 A- 34

A 4 2

A-20

A-44

A-35

A-44

A-43

A-28

A-17

A-21

A-18

A-23

A-8

A-29

A-25

ESC x

120

78 Select NLQ or draft

A-21

Produktspecifikationer

Varumärke:	Epson
Kategori:	Skrivare
Modell:	T-750

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