
Had only a small success with my Extruder modification and that is the modification I did on the top of the cold end.
After I always had to remove the Extruder from the frame when the Extruder Jammed because Arnitel is flexible and the filament bend/foldet inbetween the wheel and the cold-end entry I spend some of the Teflon (PTFE) I bought for the hot end modification to create a new cold end entry that is supporting the filament as far up to the wheel as possible.
Asmall modification but with enourmous impact when it comes to Arnitel Extruder jamming.
The filament does not bend or fold anymore. Instead the stepper motor gives up.
Recovering from that jam is very simple. Just retracting the filament till its fully out cut of the part that was in the extruder and put it in again. Then it will work for a few seconds again till the next jam.
With the hot-end modification self I had no success. Although I printed the right figure in highquality with normal white PLA without any trouble with the modified hot-end it fails with Arnitel as bad as the non modified extruder.
I tried several modification -> different material inside the hot end to guide the filament down to the extrution point.
Non behaved any better than the standard hot end. All jamed.
I have one last idea -> Setting the whole thing under air-presure to hopefully prevent the material to climb getting old and cloag inside the hot end. But I don't have so much hope anymore to get the thing working with arnitel.
A pitty I so had liked to print that figure in high quality arnitel. If you see the surface of that high quality sphere/ball (the right one and the zoomed) I guess you know why. The best surface I have ever seen/printed.
Next to a great surface Arnitel has the big big advantage to not smell that bad as the normal PLA. That's not just a minor point for me.
I hate to enter the printer room when I print that smelly normal PLA stuff.
To the lower picture.
Both figures are done with NORMAL white PLA
Both spheres/balls are done with ARNITEL
the left figure and ball is done in normal quality 0.2mm layer
the right figure and ball is done in high quality 0.1mm layer
the figures are slightly overworked but not so much. basicly only removed supports and bumps.
the spheres/balls are fresh from the printer.
Note that Arnitel on High quality requires a larger support for overhung parts.