Siemens Sinumerik 802D sl Programming Manual page 126

Enhanced Level Commands
4.1 Program support functions (1)
Face tapping cycle (G84), Side tapping cycle (G88)
In this cycle, the rotation direction of the spindle is reversed at the bottom of the
hole.
Format
G84 X(U)... C(H)... Z(W)... R... P... F... M... K... ;
or
G88 Z(W)... C(H)... X(U)... R... P... F... M... K... ;
X, C or Z, C: Hole position
Z or X: The distance from point R to the bottom of the hole
R_: Distance from the initial level to R level
P_: Dwell time at bottom of hole
F_: Cutting feedrate
K_: Number of repetitions (if required)
M_: M code for clamping C-axis (if required)
Fig. 4-37
P2: Dwell specified in GUD7, _ZSFR[22]
Explanations
In tapping operation, the spindle is rotated clockwise towards the bottom of the
hole and reversed for retraction. The cycle is not stopped until the return operation
in completed.
4-126
G84 (G98)
Mα Initial level
Spindle CW
M(α+1), P2
Point R
Point Z
P1
Spindle CCW
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
G84 (G99)
Mα
Spindle CW
M(α+1), P2
Point R Point R level
Point Z
P1
Spindle CCW
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04.07