Multiple-Thread Cutting (G33) - Siemens Sinumerik 802D sl Programming Manual

04.07
2.2.3

Multiple-thread cutting (G33)

G code system A
G32
Multiple-thread cutting (multiple threads in a lead) is possible without shifting the
thread cutting start point. In thread cutting operation, axis feed starts in synchroni-
zation with the start-point pulse (1 pulse/turn) output from the spindle pulse genera-
tor attached to the spindle. Therefore, the thread cutting start point is always at the
same point on the workpiece circumference. In multiple-thread cutting operation,
axis feed starts when the spindle rotates by a certain angle after the output of the
start-point pulse from the spindle pulse generator.
Fig. 2-20
Format
With the commands of "G... X (U)... Z (W)... F... Q... ;", the spindle rotates by the
angle specified by address Q after the output of the start-point pulse of the spindle
pulse generator. After that thread cutting starts toward the point specified by X (U)
and Z (W) at the lead specified by an F command.
© SIEMENS AG 2007 All rights reserved
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
G code system B
G33
Double-start thread
Commands Calling Axis Movements
2.2 Using the thread cutting function
G code system C
G33
Lead
2-43