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[Solved] Under extruding/lower section of model  

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JOEYG
(@joeyg)
Member
Under extruding/lower section of model

Hey everyone, just got the MK4S but I’ve been using the mk3 for years. Right out of the gate the models have been under extruding only on the lower side of the print models (see photos). I checked the wire diameter and it matches the print settings. I slowed the solid infill speed and up’d the overlap but it’s still only on the lower section of the model.

Has anyone else run into this before? My other thought was it was a translation error from fusion 360 to Pslicer but even the print models that came with the USB from prusa had the same issue. Thanks in advance for the help.

Posted : 04/02/2026 2:06 pm
JOEYG
(@joeyg)
Member
Topic starter answered:
RE: Under extruding/lower section of model

hey everyone, figured out the problem which turned out to be a hardware issue. My Y axis belt was loose, used the prusa app to “tune” it properly and viola! I was a little disappointed as I bought this as an assembled kit and expected it to be dialed in. Also as a side note I personally had to adjust my heat settings on the prusament by 15* for a better infill.

Posted : 10/02/2026 4:18 pm
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