Siemens SINUMERIK 840DE SL - Page 204

5
ShopTurn Functions 08/2005
5.3 Turnin
g
5
♥ Siemens AG, 2005. All rights reserved.
5-204 SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
6. The tool moves back to the return plane at rapid traverse.
Thread longitudinal
Thread machining can be stopped at any time thanks to the "Quick-
raise" function. It ensures that the tool does not damage the thread
groove when raised.
Thread >
¾ Press the "Turning" and "Thread" soft keys.
Thread
long.
-or-
Thread
cone
-or-
Thread
face
¾ Press the "Thread long.", "Thread cone" or "Thread face" soft key.
Parameters Description Unit
T, D, S, V See Sec. "Creating program blocks".
P Pitch mm/rev
in/rev
Turns / "
MODULE
G Pitch change – only for P= mm/rev or inch/rev
G = 0 The thread pitch P does not change.
G > 0 The thread pitch P increases by the value G per revolution.
G < 0 The thread pitch P decreases by the value G per revolution.
If the start and end pitch of the thread are known, the pitch change to be
programmed can be calculated as follows:
|P
e
2
- P
2
|
G = .... . [mm/rev
2
]
2*Z
1
The identifiers have the following meanings:
P
e
End pitch of thread [mm/rev]
P Start pitch of thread [mm/rev]
Z
1
Thread length [mm]
A larger pitch results in a larger distance between the threads on the workpieces.