Can anyone help cutting round holes

i have a new Falcon 2 40w laser and i am trying to cut round holes in cardboard but the holes come out misshapen

One of your belts need to be tightened. I had that issue as well and the belt on the right side of my laser had to be adjusted

can i add a image to this post?

You can upload an image.

in Lightburn this is a perfect circle but im getting this

While you’re making sure the belts have the proper tension, check all of the tiny setscrews holding the belt pulleys onto the motors: in all likelihood, one screw is loose.

Although this guide is for Sculpfun lasers, you’ll recognize most of the parts and the problems & solutions are similar:

thanks for the help

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