Quote Originally Posted by Clive S View Post
Is it out by 0.5mm over 200mm ? if so the steps per might be wrong
Clive, I don't think this will be the case. More likely the frame geometry.

Peter, If it is cutting squarely on the X-Y plane, then the easiest thing to do is put an MDF sacrificial bed on and machine it flat with a largish cutter. IF that produces a rippled surface, then your Z axis is not going squarely up and down, again geometry!

You are a lucky bugger to be in a position to order a new machine from Dean. I would if I could, but only so he would not be able to criticise it (not that I would expect it to have any flaws )