Driving me crazy

I am new to this laser cutting. I drew up a piece that is 50mm square with a 26mm hole in the middle. When it cut it came out 50mm square but with a 21mm hole. Went back and checked the file and it says 26mm circle. Don’t know why it cut a 21mm hole? Any ideas on what to check? The machine is a Xtool D1 pro and a 20 watt laser.

The most common reason is the rapid movement between square and the circle is being eaten by backlash. Loose belts

Try this file and post results please

Dot Test with Angle.lbrn (46.3 KB)

I cut 4 of them. It cut the squares first then cut the circles. they all came out the same.

I will try that tomorrow. Thanks

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