Casting troubles and Renishaw easyset

[kccadcam]

I have a crappy casting that varies all over the place so,,,

I'm using our probe with Renishaw's easyset macros.

 

The casting has a trianular feature that we want to re-cut to locate on a fixture

 

Starting with O9843 to find the angle of the side wall to rotate program.

Then using O9023 (3-point bore cycle) to hit the three walls of the triangle

to find center of the feature and set a new work offset to prep the parts for further machining.

 

O9843 works great every time, O9023 is not consistent at all,,, position varies all over...

Not sure if a bore cycle is the best for hitting 3 flat walls.....

 

G0 G90 G20 G17 G40 G49 G80 G94
N106 ( 6MM RENISHAW PROBE   TOOL - 106 )
T106 M6
M22
M24
G131
G0 G54 G90 X0. Y0. A0. C0. S0 M5
M21
M23
G43 H106 Z8. T107
Z7.125
G65 P9832
G65 P9810 Z6.8158 F50.
G65 P9843 X.25 D.240
#550=#144
G65 P9023 A11. D1.073 B[#550] S115.
Z8.
G130
G0 G53 Z0.
M01


G0 G90 G17 G40 G80 G94
N107 ( 1/2 3-FL CEM X 1.250 LOC    TOOL - 107 )
G17
G68 G90 X0 Y0 R[#550]
( T107  G54.1 P15 )
T107 M6
M22
M24
G131
G0 G54.1 P15 G90 X.122 Y-.0515 A0. C0. S12000 M3
M21
M23
G43 H107 Z9. M8 T71
Z7.1215
G1 Z7.0015 F200.

 

Need some ideas,,,, how would you guys tackle this???

[Guest CNC Apps Guy 1]

WHat if you probed the outside of that with a bos cycle? I'd bet it's more consistent than doing a 3 point bore in the triangle...

 

Just a thought.

 

Another possibility (and I'm not sure exactly how to accomplish it but I'm sure it's possibility.... Measure each flat in 2 spots to create an angle line. THen calcualte the IC (Inscribed Circle), then calcualte the center of the IC.

 

Just a thought.

[MIL-TFP-41]

I had to do something similar in the past....I did something like Apps Guy said using the 9816 macro....basically I found the 3 corners using that and took the average to find the center.