problems with circles not cutting circular

[bigfred]

]I am having with circles not coming out circular doing both pockets and profiles. I am using v-carve pro latest version but also had the same problem with the previous version . My machine is the oozenest workbee with the duet controller , belt and screw driven . I have read similar posts and tried out some of the suggestions with various results see photos

slowing down the feed rates improve the circles but when increasing the depth of the cuts problems got worse

Any help and advice would be greatly apprecitated

note i have run the files through a g-code simulator and they look fine could it be a post proccesor or machine problem . thanks in advance for any help you can give

[dealguy11]

Almost certainly a machine problem.

All of the normal mechanical things should be addressed. Make sure belts are tight. Make sure pinion gears are not loose. Check for binding or another problem that would cause you to lose steps. I don't know your machine, but somewhere in it is something that is letting at least one of the axes drift from where it's supposed to go.

[Adrian]

The other thing to consider is your feed rates and pass depths. They might be just too much for the machine.

[martin54]

As Adrian has already said you may be expecting to much from the machine, this would seem to suggest that:

slowing down the feed rates improve the circles but when increasing the depth of the cuts problems got worse

Your machine may not be that rigid so a bit of experimenting to find speed, feed & DOC settings that work well may be required

[dakotablue]

I had the same problem. I tweaked the voltage on the stepper motors until I got it right. It was trial and error but no problems since. I'm sure my machine is different but its what I did. Good luck.