I have two IH CNC mills. Both will stop for no reason while running a Gcode program. The mill just stops as if you had pressed the E-stop button. Mach3's red "Reset" button is flashing. No error messages are shown. It's not a problem in the programs because sometimes they run to completion with no error. I searched the web and found that perhaps I should turn off "Use Watchdogs" in the general config. I did this but no improvement. Any ideas?