Gentlemen,
I have a request. I would like someone to program a probe cycle to
do this. I would like it in python. I want to have the probing cycle
for my machine but even more I would like a simple program to compare
with this to help me learn python.
I want to add more probing cycles.
John K. , Chris R. and Jeff E. - don't laugh too hard. I think I
could write coherent code eventually. :) :) :)
Scope:
This program would probe the inside diameter of a hole four times to
determine the center position of a hole. More or less probing could be
done but four will yeild a fairly accurate hole center position.
This position could be used to set a work center offset eg. g54...
With a dialog box for added offset numbers this could assign the
hole center postion a desired coordinate value for setup purposes.
Beyond the scope of this program:
This position could be used to determine the hole center position
for inspection purposes)
With more calculation the hole diameter could also be determined
(need probe diameter)
The inspection aspect can be the focus of MUCH development: Holes,
Bosses, Cylinders, Distances, Cones, ...
#1 = 2.00 (approximate diameter of hole to be probed)
(ask operator)
#2 = .200 (probe distance)
(ask operator)
#3 = .1 (clearance distance to position probe tip near edge of
hole) (do not ask operator)
#4 = 0 (x - desired absolute hole position after probing)
(ask operator)
#5 = 0 (y - desired absolute hole position after probing)
(ask operator)
#6 = 54 (desired offset G54 - G59.3)
(ask operator)
#7 = record the X absolute position of the probe tip at the start of probe cycle
#8 = record the Y absolute position of the probe tip at the start of probe cycle
(operator instruction - position probe tip near the center of the hole)
(PROBEOPEN holeprobe.tmp)
G91 G00 X [#1/2-#3] (rapid to the first probe start position)
G01 F10.0 (feedrate could be parameterized)
G91 G38.2 X#2 (probe inside the X positive edge of the hole)
G91 G00 X -[#1/2-#3] (rapid to the second probe start position)
G91 G38.2 X-#2 (probe inside the X negative edge of the hole)
G90 G00 X#7 Y#8 (rapid to the probe cycle start position)
G91 G00 Y [#1/2-#3] (rapid to the third probe start position)
G91 G38.2 Y#2 (probe inside the Y positive edge of the hole)
G91 G00 Y -[#1/2-#3] (rapid to the fourth probe start position)
G91 G38.2 Y-#2 (probe inside the Y negative edge of the hole)
(PROBECLOSE)
open holeprobe.tmp with ?PYTHON?
compare two x positions to determine the midpoint - this is the x
center position
compare two y positions to determine the midpoint - this is the y
center position
apply desired position (#4) to the calculated x midpoint and write to
the parameter file
apply desired position (#5) to the calculated y midpoint and write to
the parameter file
thanks
Stuart
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