Siemens Sinumerik 802D sl Programming Manual page 112

Enhanced Level Commands
4.1 Program support functions (1)
Deep hole drilling and recessing in longitudinal axis (G74)
In the cycle called by G74, peck feed operation parallel to the Z--axis is repeated to
carry out a face cut--off cycle.
Δd
C
(R)
Z
Fig. 4-25
Format
G74 R... ;
R: Retraction amount
This value is modal and can be preset using GUD7, ZSFI[29]. The value set here
can be overwritten by the NC program command.
G74 X(U)... Z(W)... P... Q... R... F...(f) ;
X: Starting point X (absolute position)
U: Starting point X (incremental)
Z: Starting point Z (absolute position)
W: Starting point Z (incremental)
P: Infeed amount (Δi) in X axis direction (without sign)
Q: Infeed amount (Δk) in Z axis direction (without sign)
R: Retraction amount (Δd) at recess base
F: Feed rate
Note
1. While both e and Δd are determined by address R their meanings are specified
by the appearance of address X (U). Δd is used when X(U) is specified.
4-112
Δk' Δk Δk
(R) (R)
(F) (F)
Cutting path in deep hole drilling cycle
(e)
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
Δk Δk
(R) (R)
(F)
(F) (F)
W
e
© SIEMENS AG 2007 All rights reserved
04.07
A
[0<Δk'...Δk]
Δi
(R)
U/2
Δi
Δi'
X
[0<Δi'...Δi]
B