Epson TM-T20II Technical Reference Guide - Page 28
Electrical Characteristics, Print ratio
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Electrical Characteristics Operating voltage Current consumption (24V, 25°C, standard print density) Standby Operating DC 24V ± 7% Mean: Approximately 0.1 A Mean: 1.8 A (M267A), 1.5 A (M267D, M267E) Note: When print ratio is approximately 18% Continuous printing for 50 lines (repeating 20H-7FH) Font A, 48 columns, ASCII character 5 line feeding Autocutting If printing is continuously performed with a high ratio, the overcurrent protection may be activated and result in uneven print density or a low voltage error. Therefore, the printing length must not exceed the following values when printing with high print ratio. Print ratio: Number of dots being energized per one dot line/Total number of dots per one dot line (576 dots) Print ratio 80% 100% Print example Print length 58 mm {2.28"} 30 mm {1.18"} 72 mm {2.83"} 20 mm {0.79"} 28