Idle Clogs

Hello,
I have an unusual problem with the G2E and random clogs. I'm currently using a very "soft" PLA filament (Noname). It happend with "matte" filament too. My spring tension is at an absolute minimum.

The extruder has now caused blockages several times at the start of printing. After a few tests, I found that the blockages occur when a print was completed shortly before, i.e. the print head still had residual heat. The residual heat in the printer is not particularly high (approx. 35 degrees). However, the extruder motor may radiate additional residual heat.

I have now always pulled out the filament after about 15 minutes of finished prints and you can see that the pressure of the ball bearing unfortunately crushes the filament across its width and thus causes blockages.

In old Bowden extruders, this was dealt with by installing U-ball bearings (or groove bearings) in the extruder, thereby at least maintaining the shape of the filament.

Unfortunately I couldn't find a ball bearing in the right size.

Is this issue known? Are there any fixes?

If necessary, you could simply add ventilation channels to the extruder gear in the printer to drop the tempreature. Slightly moving the ball bearing could also help.

The issue names no repository files, tests, or entry points. Start by reproducing the clog with soft PLA after a completed print and examining the extruder's residual heat and filament deformation; done would require an agreed, verified fix that prevents the blockage.

Written by the indexing model from the issue text.