
B–63522EN/02
13. FUNCTIONS TO SIMPLIFY
PROGRAMMING
NC FUNCTION
161
As shown in the figure below, this cycle is the same as G71 except that
cutting is made parallel to X-axis.
A’
∆u/2
∆d
B
Tool path
(F)
(R)
e
45°
(R)
(F)
A
C
∆w
R : Rapid traverse
F : Feed
d : Parameter setting
Command
G72 W(∆d) R(e) ;
G72 P(ns) Q(nf) U(∆u) W(∆w) F(f) S(s) T(t) ;
∆d, e, ns, nf, ∆u, ∆w, f, s, and t are the same as those in G71.
For the shape to be cut by G72, the following four patterns are considered.
Any of them is cut by repetition of operation parallel to the X axis of the
tool. The signs of delta U and delta W are as follows:
BB
A
A’
U(+)…W(–)…
A
A
A
A’
+X
+Z
U(+)…W(+)…
U(–)…W(–)…
U(–)…W(+)…
Both linear and cir-
cular interpolation
are possible.
It is possible even
there are many
pockets.
A’
A’
BB
This function is effective only in memory mode.
13.5.2
Stock Removal in
Facing (G72)
Format