engraving not very accurate and makes similar mistakes when doing 0's

Hi all,

ive noticed that the last few engravings I have done there has been some inconsistencies, mainly on circles, as if there is a slight step in the circle, ive not checked the tool yet so will replace it later and have another go but any ideas what could be causing this?

any help would be great

Cheers

Sounds like backlash. Is it always at the same point in the circle, roughly where an axis reverses direction?

tbf mate yes, but not on both sides

I didnt get chance to go to the workshop last night but will be there after so will take some pics. Backlash is the only setting ive not messed about with so any help would be great.