Siemens Sinumerik 840D Operating Turning page 6

Section 3
Notes
B500
B500
Turning
α Plunge angle
(Thread re-
lief)
α0 Starting angle offset
α1 Angle of the tapers
α1 Angle of the first edge
(Metal re-
moval)
α1 Flange angle 1
(Back-cut)
α2 Angle of the second edge
(Metal re-
moval)
α2
Flange angle 2
(Back-cut)
Infeed taper (angle)
αP
Allowance Finishing allowance ( only with finishing)
(Metal re-
Yes
moval)
U1 contour allowance
No
Selection Statement of the tabular value, e.g. M10, M12,
(Thread) M14,...
Width of back-cut
B1
B2 Width of back-cut, top
Machining
Roughing
Finishing
Roughing + Finishing
Machining Machining directions
direction
Planar
Turning
Longitudinal
(Metal re-
moval part-
ing)
Machining
Longitudinal
direction
Parallel to contour
(Thread re-
lief)
Page 4
Unit
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
Degrees
mm
mm
mm
840D/828D SINUMERIK Operate