Variable Lead Thread Cutting (G34) - Siemens Sinumerik 802D sl Programming Manual

Commands Calling Axis Movements
2.2 Using the thread cutting function
2.2.4

Variable lead thread cutting (G34)

Format
G code system A
G34
G34 X... Z... F... K... ;
With the commands of "G34 X (U)... Z (W)... F... K... ;", variable lead thread can be
cut; thread lead variation per one spindle rotation is specified by address K.
Fig. 2-23
Table 2-8
mm output
inch output
S × (F + K
Feedrate at end point
Specify the commands so that the feedrate at the end point will not be a negative
value.
(F + K
) 2 + 2KW > 0
2
Notice
In the continuous block thread cutting for variable lead thread cutting, distribution
of command pulses is interrupted at joints between blocks.
If a K command is outside the programmable range, an alarm occurs.
If address Q is designated in the G34 block, an alarm occurs.
2-46
G code system B
G34
Variable lead thread
Upper limit of feedrate at end point
500 mm/rev
50 inch/rev
+ KN) ≦ max. cutting feedrate
2
SINUMERIK 802D sl/840D sl840D/840Di sl/840Di/810D ISO Turning -- 04.07 Edition
G code system C
G34
Upper limit
© SIEMENS AG 2007 All rights reserved
04.07