Parameter Description Unit
G Change in thread pitch per revolution - (only for P = mm/rev or in/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 meanings are as follows:
P
e
: End pitch of thread [mm/rev]
P
a
: Start pitch of thread [mm/rev]
Z
1
: Thread length [mm]
A larger pitch results in a larger distance between the thread turns on the workpiece.
mm/rev
2
Machining
● ∇ (roughing)
● ∇∇∇ (finishing)
● ∇ + ∇∇∇ (roughing and finishing)
Infeed (only for ∇ and
∇ + ∇∇∇)
● Linear:
Infeed with constant cutting depth
● Degressive:
Infeed with constant cutting cross-section
Thread
● Internal thread
● External thread
X0 Reference point X from thread table ∅ (abs) mm
Z0 Reference point Z (abs) mm
Z1 End point of the thread (abs) or thread length (inc)
Incremental dimensions: The sign is also evaluated.
mm
Amount of crown Allowance to compensate for sag (- only for external thread and G= 0)
● XS
Segment height, crowned thread
● RS
Radius crowned thread
Positive values: Convex
Negative values: Concave
Note:
the pitch change per revolution "G" must be "0".
mm
mm
Programming technology functions (cycles)
10.2 Rotate
Turning
420 Operating Manual, 06/2019, A5E44903486B AB
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