this post was submitted on 21 Sep 2025
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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?

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[–] einkorn@feddit.org 1 points 2 months ago* (last edited 2 months 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)