Cutting deeper in areas???

[alboy]

Hi Guys

Well here is a strange problem, having been cutting loads of plaques something seems to have gone somewhat haywire in that my machine is suddenly cutting deeper on the left side of the item being cut, very noticeable in the picture. you can see on the text that it has cut fairly deep from the top left to cutting so shallow towards the bottom right that it barely cuts through the paint mask.


The spoil board is nice and level and the material is of equal thickness.
The CNC uses the DSP controller, used vectric to design the plaque. Thought maybe it was a dodgy output file so remade the design with new tool paths etc but problem still there. Any Ideas ?

Cheers

Al