Greetings all;

I just trim to trim the z backlash (its hopeless, wait for new ball screw) 
and set my auto-zero-cal code up to establish its home position as being 
the back end of this gage I have made.

The code I think, is doing exactly what I wrote it to do, but when I run 
it, expecting it to set the co-ordinates of g54 properly, I find its 
setting it relative to whatever it thinks home is.  Not at all useful.

It appears that I need a method to use this gage twice, once to home the 
lathe, and then to establish the offset, the touch off IOW, doing both 
again when I have completed a part and have brought the stock thru the 
chuck and re-clamped it in preparation for making the next copy of the 
part.

So it appears I will need to do an ini axis homing section, per axis to 
home it, but this is going to need a switchable home method dependent on 
the tool mounted since the x home will need to be searched from the outside 
in for a normal tool, but from the inside out for a boring bar tool.

So, is there a way to use the tool number to switch this homing sequence?

Or, alternatively, and AFAIAC, the much better way, a method of setting the 
"home" position of an axis from gcode?  Something like a brute force 
setting of one of the $5xxx variables?  Home as one of those vars, doesn't 
seem to be assigned in the rather limited list included in the G54-etc 
section of the gcode.  All that covers is the variations of co-ordinate 
systems.

Then, can I 'net' the debounced signal from the probe, into the motion.home 
tree somehow, but without normal probe activity mucking with motions idea 
of 'home'?

Thanks for any guidance.

Cheers, Gene
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