SATO CL4NX Operator's Manual page 234

[Calibrate]
Adjust the media sensor level.
In instances of media detection malfunction, adjust the media sensor level (Gap and I-mark sensors).
The setting items are as follows:
Auto-calibration
Automatically adjust the sensor level.
◦ Does not appear if you have installed the optional linerless cutter kit (CL4NX only).
GAP Levels
Manually set the Gap sensor level.
GAP Slice Level
Manually set the Gap sensor slice level.
I-Mark Levels
Manually set the I-mark sensor level.
I-Mark Slice Level
Manually set the I-mark sensor slice level.
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[Advanced]