User Guide

Keep in mind that the ambient temperature may be affected by factors such as direct exposure to sun
or close proximity to heating elements.
CAUTION: When the duty cycle exceeds the limits shown in the following table, the receipt
printhead will heat up and shut down. This may damage the printhead.
To avoid this problem, do one or a combination of the following:
1. Reduce the amount of coverage.
2. Reduce the time of continuous solid printing.
3. Reduce the ambient temperature.
Allowable duty cycle (measured over one minute of continuous printing
Amount of Solid Coverage Ambient Temperature
25°C 35°C 50°C
20% 100%* 50%* 20%*
40% 50%* 25%* 10%*
100% 20%* 10%* 4%*
*Duty Cycle - Percentage of time that the specified “Amount of Solid Coverage” can be printed during
a one minute period of time. Example: at 20% solid coverage, 35° C temperature, a 50% duty cycle is
to be used, resulting in 30 seconds of printing and 30 seconds without printing.
For reference:
●
A typical receipt with text (contains some blank spaces) is approximately 12% dot coverage.
●
A full line of text characters (every cell on the line has a character in it) is approximately 25% dot
coverage.
●
Graphics are approximately 40% dot coverage.
●
Barcodes are approximately 50% dot coverage.
●
A solid black line is 100% dot coverage.
14 Chapter 3 Operating the Printer