WEB6. Problem: The motor works regularly, while filament comes out in snatches, or the motor works regularly, but no filament comes out from extruder. The filament can not be loaded in or extruded. Reason: 1.Using the non-original filament; the filament has impurities, or bubbles. 2. The diameter of filament is large, stuck in the teflon tube. 3.