Hey everyone,

I am currently recalibrating my printer after.not using it for a while. When doing a flow test I noticed these blobs forming in the middle of the circles.

AFAIK these are often caused by moistures in the filament. I already dried the filament at 50°C for a couple hours in the oven and the problem persists. So I guess I should simply get rid of the filament and open a new pack?

What’s your assessment?

  • einkorn@feddit.orgOPEnglish
    1·
    8 days ago

    Update:

    The printer is a Prusa MK4S with stock parts.

    The filament is by recyclingfabric.

    I have run through all relevant calibrations in Orca Slicer and the blobs still happen but only when using these circular patterns. I’ve printer the bracket I designed. Need to further tune the edges but overall it seems good to me:

    • einkorn@feddit.orgOPEnglish
      1·
      7 days ago

      I did another test with a simple cube and the same top shell pattern as the test and got similar results.

      I am printing at 200°C based on the following temp tower.

      As for speed, I am using the Orca Slicer preset “0.20mm SPEED @MK4S 0.4”:

      • First Layer: 40 mm/s
      • Walls: 170 mm/s
      • Infill: 200 mm/s -Top Surface: 100 mm/s

      Additionally based on the calibration test I came up with 18 mm/s for max volumetric speed. (Test result below)