
B-63942EN/02 NC FUNCTION 5.PROGRAM INPUT
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5.36.5 End Face Peck Drilling Cycle
The operation shown in the figure below is performed according to the
command described below. This function enables chip breaking in
outer diameter cutting. If the second axis on the plane (X-axis (U-
axis) for the ZX plane) and address P are omitted, operation is
performed only along the first axis on the plane (Z-axis for the ZX
plane), that is, a peck drilling cycle is performed.
Format
U/2
W
∆d
∆
i’
C
∆
k'
∆
k
∆
k
∆
k
∆
k
A
(R)
(R)
(F)
(R)
(R)
(R)
(F)
(F)
(F)
(F)
∆
i
∆
i
e
B
[0 < ∆k’ ≤ ∆k]
X
Z
(R)
[0 < ∆i’ ≤ ∆i]
(R) ... Rapid traverse
(F) ... Cutting feed
+X
+Z
G74R (e) ;
G74X(U)_ Z(W)_ P(∆i) Q(∆k) R(∆d) F (f ) ;
e : Return amount
X_,Z_ : Coordinate of the second axis on the plane (X-axis
for the ZX plane) at point B and
Coordinate of the first axis on the plane (Z-axis for
the ZX plane) at point C
U_,W_ : Travel distance along the second axis on the plane
(U for the ZX plane) from point A to B
Travel distance along the first axis on the plane (W
for the ZX plane) from point A to C
∆i : Travel distance in the direction of the second axis on
the plane (X-axis for the ZX plane)
∆k : Depth of cut in the direction of the first axis on the
plane (Z-axis for the ZX plane)
∆d : Escaping amount of the tool at the cutting bottom
f : Feedrate