- Check whether the plastic is correctly loaded in the feeder; whether plastic filament comes to the print head.
- Check that the temperature of the extruder meets the recommended processing temperature of the plastic.
- If points 1. and 2. are met, then the nozzle is clogged. Go through the PLASTIC NOZZLE CLEANING procedure, p. 8.2; or PLASTIC NOZZLE REPLACEMENT procedure, p. 8.1.