Filament not purging, extruder making clicking sound
Hello community:
I loaded brand new prusament on core one plus and printed a few models, and, in the middle of printing, suddenly filament got stuck due to the knot in the filament spooler (the knot appears to be manufacturing issue rather than anything else). Unfortunately thoughm this resulted in the nozzle coming loose and also damage to my steel plate. I removed the nozzle, tried to clean it, but filament was also stuck inside. I heated nozzle and removed as much filament as possible, loaded the nozzle and ran calibration again. Everything worked fine, except that filament wont purge anymore and the extruder makes a clicking sound (see the video). I will appreciate if youc an help how to fix this issue. Is nozzle out of order or still blocked? Are there other issues. How to rectify this and start printing again.
RE: Filament not purging, extruder making clicking sound
here is a video
RE:
Hi,
I guess this happens to everyone, sooner or later, in variants.
The extruder "clicking" means the nozzle is stuck. Don't let the printer run anymore, use either front-panel "controls" menu on Extruder or direct manual filament feed (through the open idler door or the PTFE tube connector at the top of the head with the tube removed - both works - to resolve the situation. Plan for an hour or two, part of the learning curve, you'll know the next time how to fix it quickly. It's not exactly "easy" - takes some experimenting - but no rocket science either.
If the cold end of the nozzle is seriously stuck and even a temperature at the top of your filament's range doesn't allow you to push filament through (see cold pull procedure, e.g. Prusa's official instructions - manual, not the wizard), you can try to disassemble the nozzle and carefully clean it out with a 2 mm drill, e.g. clamp it in a vice and rotate the nozzle against it between fingers. It's not a perfect solution and may scratch the nozzle, but worked for me and those nozzles are still in everyday use.
Take the opportunity to learn and perfect "cold pull". This will let you clean out any foreign material that is stuck in the "hot" part of the nozzle.
But, more importantly, it seems there is material stuck in (what used to be) the "cold" end and getting that out can be a bit tricky.
And: For CHT (Hi-Flow) nozzles, stay away with steel needles. They will damage the internal structure and the stuck material is further up where you couldn't reach it anyway.