I am trying to use grbl for tangential knife cutting . I want to use XYZ limit switches. I don't want limit switch function for A axis ,but only homing function. Is there any setting to suppress the limit switch function for A axis alone?
I almost doubt it would be able to, but check the grblHAL wiki. What you can do is disable Hard Limits. Use Soft Limits instead, just using the switch to Home. You can disable Soft-Limits per-axes by setting that Axis's Max Travel value to 0. Otherwise, a manual disconnect switch to flip after homing may be an option
I think you can just not home A, home will be where it turned on. so after you establish a home position you only need to send it to G53 G0 A0 before you turn the controller off and it will always be 'homed' when you turn on
