Epson TM-T20II Technical Reference Guide - Page 22
Printing Specifications, width paper printing
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Printing Specifications Printing method Dot density Paper width Standard mode (initial setting) 42 column mode Character Standard mode Font A spacing (initial setting) Font B 42 column mode Font A Font B Line spacing Maximum print speed* 80 mm width paper printing 58 mm width paper printing Thermal line printing 203 × 203 dpi 72.0 mm {2.83"}, 576 dots 52.5 mm {2.07"}, 420 dots 68.3 mm {2.69"}, 546 dots 47.3 mm {1.86"}, 378 dots 0.25 mm {0.0098"} (2 dots) 0.25 mm {0.0098"} (2 dots) 0.38 mm {0.015"} (3 dots) 0.25 mm {0.0098"} (2 dots) 0.25 mm {0.0098"} (2 dots) 0.25 mm {0.0098"} (2 dots) 3.75 mm {1/5"} (initial setting, programmable by command) 200 mm/s {7.87"/s} dpi: dots per inch *: when the printer prints with the standard print density level at 25°C {77°F} and 24V. To change the paper width, you need to install the 58-mm width paper guide plate and to make the paper width setting with the memory switch. For information about how to change the paper width, see "Changing the Paper Width" on page 37. The printing speed changes automatically depending on the applied voltage and head temperature. The maximum printing speed may not be achieved depending on the type of interface, the setting of data transmission speed, and the combination of control commands. If the data transmission speed is slower than the maximum printing speed, the printing speed may fluctuate and the print result may become shaded and/or dot displacement in paper feeding may occur. Furthermore, if the data transmission speed is much slower than the maximum printing speed, intermittent printing will occur. Especially when using a serial interface, low transmission speed may cause intermittent printing. It is recommended to transmit data to the printer as quickly as possible. 22