I am having some (many) problems with my cnc right now. After 1.5 years finally getting it running properly and 2 perfect jobs a bearing went in the ballscrew and now everything is all messed up.

My machine is out of square and I am trying to get it working but I have all sorts of other problems. My previews in Vcarve are not machining as the preview. I am creating a 3.5" square and using a 60 degree v bit to go .06 deep. The preview shows very slight radius to the corners and then the actual milling makes these huge radius corners on 3 sides, then a perfect square on the last side BUT does not even close the square off?

See pic and thanks for any help and advice!