Taper thread with increasing pitch:
G34 X… Z… K… F...
G34 X… Z… I… F...
Taper thread with decreasing pitch:
G35 X… Z… K… F...
G35 X… Z… I… F...
Meaning
G34: Command for thread cutting with linear increasing pitch
G35: Command for thread cutting with linear decreasing pitch
X... Y... Z... : End point(s) in Cartesian coordinates
I... : Thread pitch in X direction
J... : Thread pitch in Y direction
K... : Thread pitch in Z direction
F... : Thread pitch change
If you already know the starting and final pitch of a thread, you can calculate
the thread pitch change to be programmed using the following equation:
N
H
N
D
)
,
*
>PPUHY
@
The meanings are as follows:
k
e
: Final pitch thread (thread pitch of axis target point coordinate) [mm/
rev]
k
a
: Starting thread pitch (programmed under I, J or K) [mm/rev]
I
G
: Thread length [mm]
Example
Program code Comment
N1608 M3 S10 ; Spindle on.
N1609 G0 G64 Z40 X216 ; Approach starting point.
N1610 G33 Z0 K100 SF=R14 ; Thread cutting with constant pitch
(100 mm/rev).
N1611 G35 Z-200 K100 F17.045455 ; Pitch decrease: 17.0454 mm/rev2
Pitch at end of block: 50 mm/rev
N1612 G33 Z-240 K50 ; Traverse thread block without jerk.
N1613 G0 X218
N1614 G0 Z40
N1615 M17
2.9.10.3 Programmed run-in and run-out path for G33, G34 and G35 (DITS, DITE)
The run-in and run-out path of the thread can be specified in the part program with the DITS
and DITE addresses.
Fundamentals
2.9 Motion commands
NC programming
228 Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
To Next Page
Loading...
Need help?
General
