Print is not quite round

Hello all,

I have printed yesterday a threaded rod with a diameter of 30 mm and today some parts with larger holes (> 20mm). I noticed that the threaded rod is not quite round and also the holes are not really round.

Habr you also had this before?

I have drawn the parts with Fusion 360 and sliced with Luban.

Greetings
Michael

Search can be your friend.

Basically you really need to dial in your stepping.

Bookmark this you will need it.

https://teachingtechyt.github.io/calibration.html

I had same issue. Replaced one of the linear motors, and everything was round again. I think I had too much backlash in the rail, was getting worn out.

I had alot of rounds of this, its likely from oen or more of your linear modules being sloppy/loose.

Theres a few threads from awhile back going into detail.

I found one of them, Loose Linear Module w/ Workaround Attempt