Re: Slightly wrong size end result
I'm starting to think it's a post issue too. Are you using the default post?
I'm not familiar with Mach3, but let's analyze this line. Here is what I believe the G-code does:
G00 -rapid
G49 -cutter length offset cancel
G40.1 -possibly cutter compensation cancel, but not sure why it's G40.1 and not just G40
G17 - XY plane
G80 -fixed cycle cancel
G50 -ramp slope control cancel
G90 -absolute positioning
G64 - don't know what this does, but a google search leads me to believe it might be for constant velocity mode.
For a simple experiment, have you tried emulating the other safety line in your mach3 post to see what happens?
Can you attach your post? I don't keep the old posts I know I'll never use, so I don't have the mach3 post easily available to look at.
Thanks,
Dan
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)