How can I fix it
Top of form fault - I assume you hit "Feed" button and still got the form fault... if so:
1. check paper sensor position, sometimes just 1/8" one way or the other will make a difference.
2. calibrate the printer to the stock you have loaded - calibration is EASY, just press and hold the feed button until the printer cycles 8-10 times. Let go, should say "Calibration Complete". Hit "Feed" again to see if your top of form fault is fixed.
Maybe the sensor is dirty or needs calibrated. The calibration procedure is a bit complicated. Download the manual and go to page 42. http://datamaxcorp.com/_assets/library/pdf/mclass_ops_88231301_e.pdf
SOURCE: Top of Form Fault error
It means that the printer did not get a good calibration on the label. First make sure the label sensor is in the proper position. Look at the green bar that the label passes underneath and make sure that the white line (the sensor) is positioned over the label. Then calibrate by pressing and holding the FEED key for about 5 seconds until the labels start to feed. After a few labels feed out, the printer should now have a good read on the size of the label and be ready to go.
Hope that Helps !
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