We need to start to fill up lemmy :) Can you solve this issue?

My HEVO (Hypercube Evolution), now 5 years old started to have very weird banding.

It has a Bowden BMG Extruder and a E3D V6 printhead with CHT-Nozzle. MKS Robin with TMC2209 and Klipper.

Benchy is ABS, lower one is HIPS. Printed at 230°/105° bed. part cooling fan off.

I took apart and cleaned the extruder. The gears look intact and i can move the extruder by hand without binding. I found the E3D V6 was loose. I retightened it, which didn’t solve the issue.

I’ll spend a beer to the one that solves this issue ;)

Edit: Found the Issue: hotend not hot enough.

  • @h4miEnglish
    2•10 months ago

    Have you printed that blue spool before at that temp? Do you use any cooling?

    My ABS kinda looks like that if I forget the fan on, or have a too low nozzle temp.

    • @madejacksonOPEnglish
      2•10 months ago

      I usually don’t use cooling for ABS as it leads to bad layer adhesion in the final part. But ABS should print perfectly fine without cooling.

      Hmm… I print at 230° which was enough in the past, maybe my thermistor is reporting the wrong temp?

      • @rambosEnglish
        1•10 months ago

        You found solution?

        Do PID tuning if you changed anything or you might have wrong or unstable temps. I dont print much ABS but I think its safe to use part cooling fan at lower speeds. Picture looks like you are printing too hot

        • @madejacksonOPEnglish
          1•10 months ago

          Hey thanks :) Yes I found it. It seems like I printed not hot enough. I am now printing at 250° without issues anymore.