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Facing Cycle in Fanuc Control G72 or Transverse Roughing Cycle
Programming format:-
G72 W__ R__ ;
G72 P__ @__ U__ W__ F__ S___ T__ ;
W = Cutting Depth
R = Escape Distance
P = Head Sequence No. For Finishing Shape
Q = End Sequence No. For Finishing Shape
U = Finishing Allowance and Direction In X Axis Direction (Diametric Vale)
W = Finishing Allowance and Direction in Z Axis Direction
F = Feed Rate
S = Cutting Speed
T = Tool Number
Note:-
If F and S commands exist in blocks defined by p and Q, they will be ignored during roughing cycle because they are considered for finishing cycle.
Sample program:-
N01 G00 G96 G98 ;
N02 G28 U0 W0 ;
N03 T0101
N04 X176. Z2. ;
N05 G72 W7. R1.
N06 G72 P06 Q13 U4. W2. F100 S100 M3
N07 G00 Z-80. S150 ;
N08 G01 X120. W8. F100;
N09 W10.;
N10 X82. W11. ;
N11 W20. ;
N12 X35. W21. ;
N13 W12. ;
N14 G70 P06 Q13 ;
N15 G28 U0 W0 M5 ;
N16 M30;
