PTFE/Wire Harness Support Arm
The PTFE/Wire Harness Support Arm is held by a post with a tension cap on both ends, didn't take long for the arm to droop, allowing the ptfe tube, which was installed wrong to hit, the top left corner of the fan housing, as the arm moved. I fixed the tube and then the wire harness was hitting. I replacing the post with a real M3 and lock nut solved the issue, keeping the arm in alignment.
RE: PTFE/Wire Harness Support Arm
That swing arm has even been in the spotlight as "Part of the Core One philosophy":
https://blog.prusa3d.com/prusa-core-one-january-update-its-just-around-the-corner_108917
RE: PTFE/Wire Harness Support Arm
Funny, the philosphy included a proper screw and nut, not the included garbage
RE: PTFE/Wire Harness Support Arm
One thought: If the "L" is like standard Core one, the swing arm can be turned slightly on the back wall after loosening the screws that hold it. It's only a few degrees, but over the length of the swing arm it may be enough to stay clear of the fan.
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Thanks, it is a 3 screw design, no rotation possible. After printing overnight, it is hitting again, but at least the arm is not drooping.
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Prusa support was useless as usual and needed to get back to me. Doubt they'll have any real solutions to a clear design issue. This mod seems to be the answer for now.
https://www.printables.com/model/1524157-swingarm-extend-core-one-l
RE: PTFE/Wire Harness Support Arm
This is Prusa's answer to the wire harness/ptfe tube getting caught on the corner of the fan.
https://help.prusa3d.com/guide/6-nextruder-assembly_982284#994919
RE: PTFE/Wire Harness Support Arm
The Swing Arm extension, which worked great, did not last long before breaking.
RE: PTFE/Wire Harness Support Arm
This fixed it brilliantly . https://www.printables.com/model/1410439-core-one-mmu3-extruder-cable-sag-solution-only-tyw
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Thanks I'll check that out. I had tried some zip ties, but I didn't have anything of that size.
This fixed it brilliantly . https://www.printables.com/model/1410439-core-one-mmu3-extruder-cable-sag-solution-only-tyw
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Here is using Prusa's completely ineffective solution, then thier is my ugly, but working solution for the moment.
RE: PTFE/Wire Harness Support Arm
For extra insurance at this point I made a wire harness fan guard
https://www.printables.com/model/1547068-core-one-l-wire-harness-fan-guard
RE: PTFE/Wire Harness Support Arm
Here is another fix until Prusa Solves their design problem.
https://www.printables.com/model/1548181-core-one-l-swing-arm-bowden-support-clip
RE: PTFE/Wire Harness Support Arm
also make sure that the PTFE tube doesnt touch your belts, i had that before too