What do the teeth marks look like on a batch of filament, after you've extruded and retracted? Look at this guide: http://forum.makergear.com/viewtopic.php?f=3&t=2694 I will have to check the teeth marks, but I have tried tightening/loosening the filament drive tension screw, and the results ended ...

I have the Makergear M2 V4 hotend, and whenever I attempt to extrude filament (PLA black), I get issues. I have tried changing temperatures, and adjusting (loosening and tightening) the tension knob. Here are some pictures I took of the extruder/hotend, and the 3rd is a picture after I retracted it....