hi, i have been using mach for a while now on a cnc router that i built myself completely from scratch.
here is the situation. i have calibrated all the axis. everything moves accurately. ie if i move the x axis 1" or 30" it goes exactly that far +/- .005"
when i use any of the mach wizards, or g code from a cam program. the parts come out the wrong size.
if i run a hand written g code program they come out the right size.
here is an example of a simple g code program i wrote to cut the inside of a 1" square. i am using a .125" (1/8") cutter
g01
m03
z-.125
x-.9375
y.9375
x.9375
y-.9375
x-.9375
y0
z.1
and here is an example of the squares it cuts.
and here is an example of what happens with the mach 3 pocketing wizard.
as you can see they are not the right size. i am at a loss as to what could be causing this to happen.
i have also cut some parts with multiple passes for depth. ie. .100" doc. 5 times for .500" total. all of the steps line up exactly so i dont think i am loosing steps. and the manual code is also right on.
any ideas or help are greatly appreciated.