You could try adjusting the tension of the base mounting bolts; on a small machine like yours it might flex the post enough to correct the tram. Are the semi circles left by the cutter the same side when machining left to right and right to left? If the side swaps (i.e. the cutter is only cutting on the leading edge, then it could be the whole machine is flexing with the cutting load) lighter finishing cuts should fix it.
cheers didnt think of adjusting the pillar I'll have to check the cutting again to see if its flexing, before i go adjusting anything

BTW the correct way to test the tram is with a DTI mounted on arm a few inched away from the chuck, so it can be rotated aroung the table (use a parallel between the table and the dti to even out irregularities in the table surface)
I'll try that then, I've seen the dual gauge ones and always asumed you need both gauges to cancel the error, Duh..

The bottom of the groove looks like something has come loose in the tool chucking.
I think thats from when i tested the repeatability on the z, it produced a different cutter pattern for half the length but is the same depth.

I think you have other things to fix before you start worrying about tram :naughty:
Im sure your right, :cry: I was just so happy it was finally working. the other point is that I only have the single phase motor running at 1:1 so the cutter might not be quick enough.