Wuhan Huazhong Numerical Control Co., Ltd HNC-18iT v4.0 Programming Manual page 103

9.2 Multiple
9.2 9.2 Multiple 9.2 Multiple Multiple Repetitive
Multiple repetitive cycle command can only use one command to finish the rough
machining and the finish machining.
9.2.1 Stock Removal Removal in in in in Turning
9.2.1 9.2.1 9.2.1 Stock Stock Stock Removal Removal
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Stock Stock Removal Removal Removal in in in in Turning
Stock Stock Removal
Programming Programming
Programming Programming
G71 U(△d) R(r) P(ns) Q(nf) X(△x) Z(△z) F(f) S(s) T(t)
Explanation Explanation Explanation of of of of the the the
Explanation the parameters
U(△d)
the direction of AA'.
R(r)
P(ns)
Q(nf)
X(△x)
Z(△z)
F(f), S(s), T(t)
effective in the finishing program – between P(ns) and Q(nf).
+X
Figure 9.16 Stock Removal in Turning without Groove (G71)
Repetitive
Repetitive Repetitive Cycle
Turning
Turning Turning (G71)
Turning Turning without without
Turning without without Groove
parameters parameters
parameters
the cutting depth (radius designation). The cutting direction depends on
Retraction amount
Sequence number of the first block for the finishing program.
Sequence number of the last block for the finishing program.
Distance and direction of finishing allowance on X axis
Distance and direction of finishing allowance on Z axis
F, S, T function are only effective for the rough machining, i.e, it is not
△z
B
●
9. Functions to Simplify Programming
Cycle
Cycle Cycle
(G71)
(G71) (G71)
Groove Groove
Groove
99
r
A
1
△d
r
△d
A'
●
△x/2
+Z