Does anybody know if the touch probe gcode (G38) obeys 
motion.feed-hold?  (I'm guessing it should, but wondered if 
anybody knew?)

This Blum probe I got has IR communication, and sends a 
single serial byte every 16 ms when there is no event, and 
sends a byte immediately when there is a change of state of 
the probe.  So, I was thinking I could have a watchdog timer 
that causes a feed hold if the IR pickup fails to report for 
50 ms or so.  That might prevent ugly crashes if things go 
wrong.

Thanks for any comments,

Jon

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