@Adrian_Ciubotariu a good solvent for pla is methyl ethyl ketone (mek) and can be found at a local hardware store. When my hotend was clogged i disassembled it and let it soak in mek overnight. The next morning it was all dissolved. You have to be careful though, it can be a nasty chemical
@Abc_Def not in France… Can’t wait to leave this place
It’s worth while checking to see if the hobbed bolt/drive gear has chewed a circle into the filament. It will help in selecting the most appropriate fix for the issue.
Also try reducing the print speed to see if that improves things (assuming you’ve eliminated clogging). I had a print that looked like the bottom part and slowing down helped it out.
Its probably either heat creep or you aren’t getting a good temperature to print.
I’ve had similar issues that crept up after a certain amount of time. My extruder driver’s gain was too high and the motor would gradually heat up until it started skipping steps.
@scott_maher Ya I’ve seen that back on my Beta but the drive current is low and the motor remains cool unless the hot end is running high temps. It’s only a problem with ninjaflex.
@dhylands print speed was 50% on that bottom band. I lowered it to 25/30% on the rest. Still failed eventually.
Did wire testing - no problem. So now I wait on solvent. Ordered for some eSun cleaning filament too.
Hi Alan,
There are some things you can try to solve this problem. The moves you make were good, but apparently non of them works. First of all, try not to get temperature so high as 219ºC because PLA may cristalize, and then for sure will get stucked. If there is a correct manual extrusion with 190-200ºC will be better. Usually this problem come out because of the friction in the inner hot-end. you can finish with this problem by driping some 3-IN-1 Multi-Purpose Oil on the entrance of the filament to the extruder. You will experience a much better extrusion. You can also have a nice printing with more lubricated filaments.
Hope this works for you. Enjoy the printings and let us know.