Epson TM-U375 Manuel D’Utilisation

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Note:
To attach the DIP switch cover, insert the cover upward  then slide
the cover leftward,  as shown  in the illustration below.
Adjusting the Paper Roll End Sensing Position
The paper near end detector detects when the paper is almost gone by
measuring the diameter of the paper roll. Software programs can use the
ESC c 4 command to stop printing when the paper is almost gone.
If you want to change the amount of paper remaining when the printer
stops printing, follow the steps below to adjust the paper near end detector.
Note:
If
 
the inner diameter of the paper roll core is less than 10 mm (0.39
inch), the paper roll near-end detector 
may 
not work properly.
1. Open the printer cover and remove the take-up spool.
2. Determine the point on the paper roll at which you want the near-end
detector to be triggered. Then measure the distance A shown in the
illustration.
Setting Up the Printer 1-23