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Siemens Sinumerik 840D Operating Turning page 20

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Section 5
Notes
B500
B500
Milling
Rotation angle
α0
α0
Start angle
(circular slot)
α1
Opening angle of the slot
(circular slot)
α1
Text direction
(Engraving)
(only for linear alignment)
α1
Starting direction relative to X-axis
(contour)
α1
Opening angle of the slot
(circular slot)
α2
Advancing angle
(circular slot)
(only for pitch circle)
α2
angle to previous element
(contour)
αS
Starting angle
(Thread-
Milling)
Leaving
Leaving mode plane
(Path milling)
Quarter circle:
Part of a spiral ()
Semi circle:
Part of a spiral (only for path milling to the
left and the right of the contour)
Straight:
Leaving
Axis-by-axis
strategy
spatial
(Path milling)
Page 18
Unit
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
840D/828D SINUMERIK Operate

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Sinumerik 828d