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Jam/clog associated with printing lots of support?  

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For Science!
(@for-science)
Active Member
Jam/clog associated with printing lots of support?

So I have an issue with a particular print that I'm trying at the moment, where there is no plastic extruded after 100-150 layers or so. This print is a bit peculiar in its orientation and requires about 80% of the build plate to be covered in support for the initial parts, but this cannot be changed and may be unrelated to the problem.

I am printing in Filamentum PLA so the quality of the filament should be good and I have had many successful prints with these filaments up until this point.

My initial googling suggested this could be heat creep so I tried to lower the printing temperature (currently 195 degrees), increase speed (100 mm/sec for support), as well as generally maintain the hot end (re-apply thermal paste on the heatsink side of the heat break). However so far this has not remedied the issue where after a while no plastic gets extruded.

I can see that the idler gears have dug into the filament, but I assume this is a secondary effect of the jam/clog and so reducing the idler tension should not be the solution (although this is what I will try tomorrow). I was hoping to run this with octolapse (which has been working great so far), but that may also be contributing to the problem although I think it really shouldn't be the cause.

Happy to provide more info and looking forward to hearing your thoughts.

Publié : 08/11/2021 11:12 pm
Dan Rogers
(@dan-rogers)
Noble Member
Turn off octo-lapse

The reposition at every layer may be contributing to cool down.  Your model may also be one of those "noob" models that are indeed unprintable.  Hard to say.  Send a compressed post-sliced prusa slicer project file (.3mf extension, then in a .zip file) - that way others can decide whether they want to eat up a roll of filament to see if your model can be printed.

Publié : 09/11/2021 7:42 am
For Science!
(@for-science)
Active Member
Topic starter answered:
RE: Jam/clog associated with printing lots of support?

I will give it a try without octolapse, this is an 8-day+ print (Large + 5 color MMU) with only organic shapes, so is inherently difficult.

Publié : 09/11/2021 9:28 am
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