Siemens SINUMERIK 840DE Operation & Programming Manual page 83

5
08.02
P
G
Cut segmentation
(alternative)
LINEAR
DEGRESSIVE
Machining mode
(alternative)
+
© Siemens AG, 2002. All rights reserved
SINUMERIK 840D/810D Operator's Guide ManualTurn (BAM) – 08.02 Edition
5.2 Turning cycles in CYCLE mode
Explanation of parameters based on example of tapered
thread
Thread pitch
Lead change
G = 0 The lead does not change.
G > 0 The lead is increased by the value G.
G < 0 The lead is reduced by the value G.
If the start and end lead of the thread are known, the lead change to
be programmed can be calculated as follows:
2 2
|P |
- P
e
G = ⎯⎯⎯⎯⎯ [mm/rev
2*Z
1
Where:
P is the end lead of the thread [mm/rev]
e
P is the start lead of the thread [mm/rev]
Z is the thread length [mm]
1
A greater lead means a greater distance between thread turns on the
workpiece.
Infeed with constant cutting depth
Infeed with constant cutting cross-section
Infeed with
constant cutting depth
Infeed with
constant cutting cross-section
You can choose between the types of machining:
Roughing
Finishing
Complete machining (roughing and finishing)
Turning with Cycles
2
]
5
5-83