I recently got a Taz 2, and I’m having a wonderful time with it. Most things I print are coming out great, but there’s one small issue that I’m hoping someone can with me with. The issue is with small models with lots of rapid retractions; the filament seems to slip further and further until it eventually backs all the way out of the print head. Here’s a prefect example of one that does it:
The base prints great, but the pins don’t print at all. After the first layer or two of the pins, the filament has backed all the way out.
If I turn retraction off, the problem goes away, but there is lots of stringing. I’ve tried 1.6mm and 1.0mm of retraction, and I suppose I could fix the problem by messing with the “extra length on restart” option in Slic3r, but that seems to be fixing the symptom and not addressing the root problem. I tried tightening the feed tension screws a bit (to about 8mm), but I don’t want to overdo anything. The hobbed bolt is clean, head temp stays at 230C, occasionally dipping to 229C (I’m printing ABS).
I have all of 4 days experience with 3D printing, and I’d love to hear from some of you more seasoned folks about what else I can try.