HAAS G68 ISSUES

[stevenprofke]

Hi, 

I'm a newbie at using G68, so having some issues.

i have a square casting that has a round boss on the bottom, i have to hold the round boss and machine the square.

i want to use G68 to make sure I'm machining square but also need to set the G54 in the middle of the square casting not of the round boss.

i have written what i thought would work but I'm having issues with where the controller stores the macro angular change.

I have tried using a G54 for the datum and G55 for just the angle but they store in the same place and keep over writing.

%
O0
(SQUARE PILOT)
(T25|6MM PROBE|H25)
(T6|10 MAPAL|H6)
(T10|16. AZSTAR BALL ENDMILL|H10)
G21 
G00 G17 G40 G49 G80 G90 
(PROBE)
T25 M06
(move from centre) 
G00 G90 G54 X-46. Y-46.
G43 H25 Z20. 
Z10. 
G01 Z5. F1000. 
G01 Z-20. F1000.
(corner probe)
G00 G90
G65 P9023 A15. I50. J50. B1. S54.
G00 Z50. 
G91 G28 Z0.
G00 G90 G54 X37.5 Y37.5
G43 H25 Z20.
G00 Z10.
G01 Z5. F1000.
(centre probe)
G00 G90
G65 P9023 A16. X75. Y75. Z-20. S54. 
G00 Z50.
M05 
G91 G28 Z0. 
M01 
G21
G0 G17 G40 G49 G80 G90
(10mm MAPAL VH)
T6 M6
G0 G90 G54 X-39.105 Y-45.617 S4800 M3
G43 H6 Z50. T10
M8
(READ G68 R#189)
G68 X0 Y0 R#189
Z5.
G1 Z-7. F1000.
X-40.214 Y-42.636 F1100.

 

 

 

 

[civiceg]

Save off #189 as another variable after  you probe. Then call this new macro variable as your angle for G68. 

[stevenprofke]

Yep, just worked that out, works perfectly now,

Cheers

[civiceg]

Also, I highly recommend using the Renishaw probing cycles. The manual can be found on the CD that comes with the probes, or online. You are using the Haas Macros that populate the Renishaw ones. It achieves the same result.  

However, you are not protecting your probe when initially positioning it. If a clamp or part is not loaded correctly the probe can move into the obstruction and break because it is not using G65P9810 (macro for protected positioning) for its initial moves.