Thanks for your quick reply, I have no idea if the code was generated with the centre at home, I'm using Artcam and cambam to automatically generate the gcode, if I park the tool over the centre of the work and do a regen the crosshairs in the mach3 screen are almost dead centre over the top of the picture, ive been playing around with it and it seems a lot better now, the only problem is that the machine is cutting smaller than it should do, for example to test I made a gcode letter "A" that I programed to engrave at a height of 10mm but when it actually cuts into the work the size of the engraved letter is about 1mm in size, I did play around with the motor tuning a bit and not sure if its right, before my computer crashed and had to reinstall Mach3 it was all working fine.