On 1/26/26 06:42, gene heskett wrote:
A higher resolution encoder? What I have is probably overkill so let me describe it. The A/B signal portion of that encoder is a 1000 ppr omron, driven from the rear of the motor, from an extension shaft I made. Which has a variable scale in the .ini file depending on the gear the go704 is in, detected & controlled by tally switches on the gear shift knob.
OK that gearing MAY be the issue, or possibly Z axis backlash. If the encoder senses motor movement before the spindle actually reverses as the gear backlash is taken up, then the tap will start the Z retraction before the tap rotation reverses. If the issue is Z axis backlash, then the spindle reverse will get ahead of the Z motion.
Andy suggests the necessary test to check Z backlash. Jon _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
