Increase Accuracy

Hi Guys

I've just finished building my ox cnc and am getting used to the combo of sketchup and aspire.


Now im imported this following item into aspire from sketchup and added all the bits needed to get the machine cutting .


Now as you can see from the pic below, the circle are not quite right nor are the arcs.

So.. my question is, is there a setting that i'm not using correctly ie the circles...

Increase Accuracy