I set the axes limits in mach2's to match the physical dimensions of my machine a while back.
This weekend, after about 40 minutes of machining, I decided the roughing steps were too fine and changed the roughing steps from 25% of cutter diameter to 100% in RhinoCAM, post-processed and tried to machine the the new g-code by starting from the same point. The cutter diameter = 6mm.
What happened was that the previous work was cut away and the more jagged steps I expected to see did not appear.
I gave up 40 minutes later. I checked the motor settings in mach2 and discovered they had changed - radically. They no longer matched the machine's dimensions.
I had not effected any changes in mach2.
Does anyone know what I did wrong and how I can keep from repeating the mistake?