Ok, so I’m running Mach 3 with a MicroMill 2000. When I use the Multi Pass wizard I get a random loss of position. ( .180 inches out in the  X)  I have gone thru the optimization and have done everything there. I ran fine for two hours and then BOOM. It pauses for a second and when it starts back up I’m out of position.  Any suggestions?

Hi, George

Was there any statement in the Status: window ?, Or did it start back up on it's own ?, Any other Program's Running ?

Post the G-code use the REPLY Button and Attach.

Thanks, Chip

Hi,
      I didn't notice any Statement.   It was cutting fine , it paused for about 3 seconds and then started cutting by itself, but it was then way out of position. . The only other program ,to my knowledge was Lazy-Cam. I had this problem earlier so I went to the website and read the optimization info and made sure I followed those instructions. So far this only seems to happens when I use MULTI PASS.

Ok.
    It happened again  The Status Line says  " Nothing to Feedhold"

Ok Here is the file

Try using a different keyboard.
Hood