Epson TM-T20 Technical Reference Guide

Chapter 3 Application Development Information
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Application Development Information
This chapter describes how to control the printer and gives information useful for printer
application development.
How to Control the Printer
Use a driver or ESC/POS commands to control the printer.
Selecting a Driver
Choose one of the drivers listed in "Printer Drivers" on page 62, depending on the application
operating environment. You cannot control a single printer with more than one driver.
For information about the driver operating environment, see the installatio
n manual for each
driver.
When you newly develop an application
•Use APD if you want to print TrueType fonts or print many graphics.
•OPOS ADK is recommended for system extensibility. An OPOS driver is provided for various
peripherals and it is a POS industry standard now. It enables POS system efficiency, reduction
of development cost, and effective u
se of application assets.
You can use all functions, including ones not supported by OPOS ADK or APD, by using
ESC/POS commands through your driver. Use the DIRECT I/O function of OPOS ADK, the
control A command of APD, or Status API to send ESC/POS commands from each driver.
(See "ESC/POS command functions" on page 56.)

Epson TM-T20 Specifications

General

Autocutter	Yes
Print Method	Line thermal
Paper Width	79.5 ±0.5 mm
Interface	USB, Ethernet
Dimensions	140‎ x 199 x 146 mm (Width x Depth x Height)
Power Supply	External power supply
Paper Thickness	0.06 - 0.085 mm