Unround / Unclosed circles on sculpfun s30 pro with expansion

[DerChristian (Christian Hellwig)]

This is the post I was referring to:

Circle trouble - beginning and end are offset

Hello, I read lots of posts regarding Circles not round and do not meet but couldn’t see the same issue I experience. I am new to laser cutting and just assembled a Sculpfun S30 Pro (10W) with Y axis extension. When engraving / cutting the first test pattern, the cut circles are oval and there are strange lines off the circles (and rectangles too). [Sample-2] I run some additional tests just on the cutting after adjusting the Y axis belt, but it made no difference. [Sample-3] I then used…

And please remember to recalibrate your steps after changing belts