EDIT: I’ve followed empireOfLove@lemmy.one 's suggestions and I have rerouted the bowden tube. Tomorrow I’ll start another print and see the results. I’ll report back.

Here’s the whole printer during that print…

https://files.catbox.moe/smtxlj.webm

…and here’s a detail image:

The printer is a Creality CR5 Pro HT running Klipper - although I doubt this is too relevant. The extruder is of the “push type” with the hotend only including the heated nozzle. Current speed is 70mm/s in the layers but at the moment of the video 35mm/s due to the top layer.

I have no idea why, with a relatively symmetrical print just this corner is so messed up and underextruded. Any idea would be nice.

  • empireOfLove@lemmy.oneEnglish
    12·
    1 year ago

    What kind of plastic?

    When it reaches that far back corner it looks like your Bowden tube is getting close to being pinched. It’s probably too sharp of an angle leading to too much resistance for your filament and drive motor, that’s what causes the underextrusion. Bit of a design flaw tbh.

    Double check your drive teeth tension it might be slipping excessively when the Bowden tube gets to that extreme angle and push resistance gets too high. Also consider trying to reposition the tube so it doesn’t experience such angles.

    • the_third@feddit.deOPEnglish
      4·
      1 year ago

      and push resistance gets too high

      Yes! That might actually be the case. We come out of the corner with a low flow rate, because, corner and low speed and the flow can’t increase quickly because of friction. Hm. I’ll reroute that Bowden tube and test again tomorrow.