Circles not starting and stopping in exactly in the same place

[NicholasL (Nicholas Leqeta)]

Looks like backlash - have a look at this post:

Omtech not cutting perfect circles, hardware or software issue?

Your results are symptomatic of a backlash problem, a common hardware issue. In LightBurn, Optimization Settings, you can enable ‘Hide Backlash’, if the problem with the circles improves significantly then you definitely have a backlash issue. I have attached a small program called backlash test I have just made, which should provide an easy method to help you identify and measure backlash.BacklashTest.lbrn2 (166.1 KB) [image] Turn off Optimize cut path and run the program, it should start wh…