Circles not circles...

[Brad Patturelli]

Not having any luck lately. I was laser cutting some acrylic key chains out and noticed the circles for the ring were not circles. the hole is about .125in. I was running at 10mm/s. Any ideas on how to fix? I'm assuming its mechanical, as the vector artwork were correct.

The engraving came out great no misalignment, just on cutting its weird. Attached pictures.keyhole1.jpgkeyhole2.jpg

[Rich Harman]

Two things. First, you can tweak the backlash settings. Second, change the artwork so that the cut starts at a different place, such as on a corner.

[Mike Chance in Iowa]

While you have already stated you checked alignment, check your belts. I noticed this happen to me once when the belts needed a mere smidge of tightening and then my circles were back to circles again.