Circles not fully round

Hey guys, I need some help. I built a laser cutter from further fabrications plans and I’ve been able to get it to work 99% perfectly. However I can’t get perfect circles. I’ve look at all the mechanics and done all recommendations from the further fabrication Facebook page. I’m at a loss as to why I can’t them perfect. I can do perfect squares at any size and get perfect diagonal lines. But circles elude me and I need to get them as it will hinder my business. you can see that the left and right sides of the circle are flattened off. I had to rotate the bike so that the bottoms were flat to hide the problem. Pleas can anyone help me?? I’ve added photos to show what I’m dealing with. Also I see my current settings
Many thanks


Have you calibrated your axes? I suspect the steps for the Y axis are slightly off.

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Or the machine isn’t 100% square.

did yo get this fixed? I had to tighten my belts very tight to fix my “oval” circles. you?

You should never have your belts ‘very’ tight - one finger pushing tight only.

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