After searching through the forum it seems I must post a new topic.
I have had my A 101 printer for about four months now and I am having problems printing with the small nozzles. The print starts okay but very soon the extruder’s hobbed bolt digs a groove in the filament and it stops feeding. It seems to work okay with the 0.5 nozzle but absolutely refuses to finish a print with the .25 and the .35 nozzles. Contacting technical support has not solved the issue. I have tried adjusting the temperature, print speed, idler bearing tension, and everything else I (we) can think of to no avail. Even running the 0.35 nozzle with the 0.25 settings did not help…
Just this evening, I took the hot end apart and measured the PTFE tube and found that although it is nominally the correct length, one end is cut at a pretty ugly angle allowing some material to extrude into the space. This component is marked as having the correct length tube per the service bulletin (i.e. it has a lowercase “a” handwritten on the lower plate).
Has anyone else had persistent problems of this type? I’m getting more than a little upset with it. I can get away with using the coarse nozzle for most parts, but I’m finding that I need higher resolution for my current projects.