14. FUNCTIONS TO SIMPLIFY
There are four grinding canned cycles : the traverse grinding cycle (G71),
traverse direct fixed–dimension grinding cycle, oscillation grinding
cycle, and oscillation direct fixed–dimension grinding cycle.
With a machine tool that allows canned cycles for grinding to be used, the
multiple repetitive canned cycle for turning cannot be used.
G71 A_ B_ W_ U_ I_ K_ H_ ;
A : First depth of cut
B : Second depth of cut
W : Grinding range
U : Dwell time Maximum specification time : 99999.999 seconds
I : Feedrate of A and B
K : Feedrate of W
H : Number of repetitions Setting value : 1 to 9999
The specification ranges and units of the canned cycle for grinding are
Move command Range :
Units : 1 µ
Feed per minute : 0.001 to 240000 mm/min
0.0001 to 9600 inch/min
Feed per revolution : 0.00001 to 500 mm/rev
0.00001 to 9 inch/rev
A, B, and W are to be specified in an incremental mode.
In the case of a single block, the operations 1, 2, 3, 4, 5, and 6 are
performed with one cycle start operation.
A=B=0 results in a spark–out.