My old Dynapth control used marks and the encoder index pulse for homing on the X & Y axes, no homing switches.  I would like to use a similar approach with Mach/Galil.  I would like to zero at the mark, have the axis go .1" or so negative, reverse positive to the encoder index.  I tried simulating the home input with a brain (activating at -.100).  It shows to be working on the diagnostic screen, but will not reverse the axis when referencing like it should.  I suspect that the homing process is internal to the Galil, so it doesn't care what Mach sees, but I would like to know if there is a way around this.

Thanks,
Mike

No way around this.  Homing is integral to the Galil.  You could probably write your own homing routine in a separate thread in the Galil.  But that would be waaaaaaaaay more work than installing switches.