please look over my shoulder if this is bona fide bug:
it seems that a G38.3 failed probe interacts with O-word if/then/else
in a strange way.
reproduce by:
expected behaviour:
- touchoff x,y,z to 0
- execute in MDI:
g38.3 z-3
g0 z0
- z feed moves to -3 where probe times out without contact, g0
retracts to 0 properly.
unexpected behaviour:
- same thing done through a sub stored in a file
- save subroutine below
- call in MDI with O4711 call [1] - g1 and g0 moves work as expected
- call in MDI with O4711 call [0] - G38 probe times out, following
G0Z0 is NOT executed, z remains at -3
if the G0 Z0 move is changed to a Z value <> 0, it actually IS executed.
It seems in the else path emc thinks it actually already is at 0 while
it's actually at -3 - which doesnt happen when executed in manually in
MDI
-Michael
save this as 4711.ngc :
------------------snip------
O4711 sub
f50
O102 if [#1 GT 0]
(debug, normal g1/g0 moves)
g1 z-3
g0 z0
O102 else
(debug, probe without contact, then retract)
g38.3 z-3
; the following move is NOT executed:
g0 z0
; if z <> 0, it actually IS executed
; these ones ARE executed:
g0 x5
g0 y3
O102 endif
O4711 endsub
m2
---------------- snip ----
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