Solved Strange Extrusion Issue

Hello! I'm having a strange extrusion issue on my R1+, it almost seems like the stepper is pushing too much filament through the hotend, but then it seems to jam:


Has anyone seen this before? It started happening recently, ~7 days ago, and I've made no change to the printer at all, neither setting-wise, hardware-wise, or even swapped the filament from the past few prints that came out without any issues and when this started having problems.

I've cleaned the extruder out, in fact I even bought an entirely new hot-end and installed it, to no avail. I've also manually run a few pieces of filament through, bypassing the stepper, and that seems to be fine. Manually extruding 10-100mm of filament through also seems to work without any problems.

Any ideas? Thank you so much in advance!

 

I have not look into calibrating the extruder, but I will try it, thanks! I didn't think about it just because I haven't changed anything lately. And yes, this is PLA, that's the only material I've used in the past 3-4 months as well.

Thanks again, I'll try this and report back!

 

Thank you! I've actually been using this for over 2 years without any adjustments/calibrations. But I will try to calibrate this in the next day or two and see if it helps to resolve this issue.

 

Thank you! I've actually had this thing for just over 2 years, and I've never had an issue quite like this. I've been pretty good at cold-pulling filament whenever I change a spool, and I did go through the process of seasoning the extruder every time I've replaced the nozzle, I'm wondering if perhaps there's something going on with the stepper.

 

Perfect, thanks! I'll try to calibrate the extruder a few times first just to see if that makes a difference, and then I'll look into the other pieces if that doesn't solve it

 

Awesome, thank you! I think I may have narrowed down the cause of the issue, it looks like the extruder fan is shot, I removed it and tested it with a 9v battery and it only moves in short bursts. I had an extra one from a kit I purchased awhile ago for the printer that I built, same specs, and I hooked that up to the same battery and it spins like a dream. I've heard of issues like this before when the fan isn't working correctly, so I'm going to replace that now and try this out.

Thanks again for your help!

 

@mark tomlinson, thank you so much for your help! The issue with this was the extruder fan. Swapped that out and it resumed working.