Thread Cutting With Increasing Or Decreasing Lead (G34, G35) - Siemens SINUMERIK 828D Programming Manual

Motion commands

9.11 Thread cutting with increasing or decreasing lead (G34, G35)

9.11 Thread cutting with increasing or decreasing lead (G34, G35)
Function
With the commands
programming a change in the thread lead at address
increase and with
can therefore be used for the machining of self-tapping threads.
Syntax
Cylinder thread with increasing lead:
G34 Z... K... F...
Cylinder thread with decreasing lead:
G35 Z... K... F...
Face thread with increasing lead:
G34 X... I... F...
Face thread with decreasing lead:
G35 X... I... F...
Taper thread with increasing lead:
G34 X... Z... K... F...
G34 X... Z... I... F...
Taper thread with decreasing lead:
G35 X... Z... K... F...
G35 X... Z... I... F...
Significance
G34
G35
X... Y... Z...
I...
J...
K...
F...
268
and
G34
to a linear decrease of the thread lead. The commands
G35
: Command for thread cutting with linear increasing lead
: Command for thread cutting with linear decreasing lead
: End point(s) in Cartesian coordinates
: Thread lead in X direction
: Thread lead in Y direction
: Thread lead in Z direction
: Thread lead change
If you already know the starting and final lead of a thread, you can
calculate the thread lead change to be programmed according to
the following equation:
The identifiers have the following meanings:
k
k
I
G
, the functionality has been extended with the option of
G35 G33
: Thread lead (thread lead of axis target point coordinate)
a
[mm/rev]
: Starting thread lead (programmed under I, J, or K) [mm/rev]
G
: Thread length [mm]
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
. With , this results in a linear
F G34
and
G34 G35
Fundamentals