Vertical waves on MK4 - How do I print this? (Printing help)

RE: Vertical waves on MK4

Rob — Fri, 16 Jan 2026 20:02:23 +0000

I had the same, tried this: https://www.printables.com/model/473119-prusa-mk4-single-layer-test-02mm and landed on an Z offset of 0.04 for my printer.

RE: Vertical waves on MK4

jan.d.slay — Mon, 08 Dec 2025 12:39:54 +0000

Oh sorry, that didn't come across clearly on my part. I actually meant checking the belt with the Belt Tuner in the Prusa app.

RE: Vertical waves on MK4

kingof7eleven — Mon, 08 Dec 2025 12:07:50 +0000

Yes, looks OK for me.

Posted by: @jan-d-slay
Have you checked the belt tension?

RE: Vertical waves on MK4

jan.d.slay — Mon, 08 Dec 2025 06:00:21 +0000

Have you checked the belt tension?

Vertical waves on MK4

kingof7eleven — Mon, 08 Dec 2025 05:02:50 +0000

Hello, after some work with the correct settings, I am actually very satisfied with the prints from my Prusa MK 4.
However, unfortunately it makes these unsightly vertical waves as shown in the photo.
Strangely enough, this doesn't happen across the entire surface, but only in the lower half of the printed part.
I've already checked everything mechanically (threaded rods, bearings, belts, etc.).
I'm printing with the original printer profile using Input Shaper.
Does anyone have any advice?
Perhaps the speed is too high, despite the original profile remaining unchanged.

Thanks!