I am trying to do threading on a lathe using the NGCGUI g76.ngc routine.  Other 
operations, facing, turning are working in NGCGUI.  When I get to the G76 line 
in the code (was stepping through it in Axis) it just stops and sits there.  
The only reason I can see for it stopping is that my plane changes to G17 (from 
G18 which is set in the g76.ngc routine) for no apparent reason.  The spindle 
turns, but there is no further movement.  I believe I have correct values for 
every G76 parameter and everything else is fine.  I have no explanation for why 
the plane changes to G17 - there is no such command in the .ngc file.  I see in 
the release notes for the various 2.7.X releases that in 2.7.0~pre5 this was 
done:  
fix velocity & acceleration values on non-G17 arcs
I wonder if this could have messed something up, or if there is some other bug 
in 2.7.0~pre6.  Any ideas?

-Tom


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