What should a user never do when UV-LED printing?

To answer simply, the following three tips are important guidelines to follow:

1. Never allow an inexperienced operator to operate the machine.
2. Your print heads are the most expensive item on your machine. Do not allow a head crash (a strike of the heads onto the substrate).
3. Your print head must never have direct light exposure from the curing lamps. This cures the ink within the print head.