need help with my rotary attachment,

need help with my rotary attachment, something shifts while engraving and the design moves down or up while its working, anybody have this before or know how to fix it, i have the larger 60w china laser with the rotary attachment that the 3 rotating bard the object sits on. As you can see at the bottom of the A it shifted downward and the last 2 letters are slightly lower. Thanks

It looks like the bottle is “walking”. It is shifting while rotating. It could be one of a multitude of issues. You need to watch a test run and see when and where this is happening.