Datamax M-Class Operator's Manual page 19

5. Close the Printhead Assembly and press down until it locks into place.
6. Close the cover and press the
If the printer does not correctly sense the top of each label, as denoted by the
Printers without front display:
Printers with front display:
Note: The printer is factory set to use 4-inch media (and ribbon, if thermal transfer equipped). When using a different width of
media/ribbon, please refer to section 6.2.
M-Class
button several times to position the media and ensure proper tracking.
FEED
Perform the Auto Media Sensor Calibration, see section 4.7.1.
Press and hold the
FEED
release. For additional calibration procedures, see section 5.4
ERROR
button until at least one label gap or mark is advanced then
light, it may be necessary to:
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