RE: PrusaXL always stops extruding mid-print, any material any speed
I found the lever locking parts tend to warp and heat up enough to allow enough play so that the tension is lost on the filament. The bolt and nut on the front of the lever lock has to be really tight and you must check it occasionally for tightness, especially if you are printing high temp filaments.
RE: PrusaXL always stops extruding mid-print, any material any speed
I just finished my enclosure and first print did exactly this same thing, tool head 4 and 5 both stop extruding after about 20 min into the print. The Idler Lever is all but loose, barley latches and the Idler nut is sitting on the housing on all 5 print heads. The other problem that is very evident is the boden tubes. Pulling the filament through has a huge amount of drag, I think they zip-tied the tube to tight and the filament drags. I might have to replace the boden tubes.
I was using a 0.6mm nozzle and 0.32mm layer height structural ASA settings. I think the retraction with high flow rate and layer height is letting the molten filament get to far up the extruder mettle tube and then when it cools a little, it just gets stuck. All three of these things seem to be going on with my printer.
I shimmed the Idler Arm and tried again, after 20 minutes of print, the idler nut was completely up against the housing again and so the springs were not doing anything AGAIN. So I am in the process of printing new arms. I don't have PC-CF, so I am using PP-CF, it should do the trick. New idler, arms, new idler nut and new idler swivel.
RE: PrusaXL always stops extruding mid-print, any material any speed
I just finished my enclosure and first print did exactly this same thing, tool head 4 and 5 both stop extruding after about 20 min into the print. The Idler Lever is all but loose, barley latches and the Idler nut is sitting on the housing on all 5 print heads. The other problem that is very evident is the boden tubes. Pulling the filament through has a huge amount of drag, I think they zip-tied the tube to tight and the filament drags. I might have to replace the boden tubes.
I was using a 0.6mm nozzle and 0.32mm layer height structural ASA settings. I think the retraction with high flow rate and layer height is letting the molten filament get to far up the extruder mettle tube and then when it cools a little, it just gets stuck. All three of these things seem to be going on with my printer.
I shimmed the Idler Arm and tried again, after 20 minutes of print, the idler nut was completely up against the housing again and so the springs were not doing anything AGAIN. So I am in the process of printing new arms. I don't have PC-CF, so I am using PP-CF, it should do the trick. New idler, arms, new idler nut and new idler swivel.
Shimming won't fix it because the rollers in the idler door have moved, so the door is hard against the extruder frame.
You've got to reprint the parts. I'm not familiar with pp-cf. What's it's temperature resistance, that's really the important factor. PCCF is good to 114°C and prints really nice, but it's admittedly tough to get, at least the Prusament. I think others have had good success with the priline PCCF as well.