HEIDENHAIN CNC PILOT 640 User Manual page 158

2
Undercut Type G:
FP: Thread pitch (default: standard table)
I: Undercut depth (default: standard table)
K: Undercut length (default: standard table)
W: Undercut angle (default: standard table)
R: Undercut radius (default: standard table)
P1: Undercut oversize
No input: Machining in one cut
P1 > 0: Division into pre-turning and finish-turning. P1 is
longitudinal oversize; the transverse oversize is preset to 0.1
mm
H: Type of departure
0: To starting point
1: Plane surface end
Additional parameters for cylinder first cut:
B: Cylinder 1st cut length (default: no start chamfer)
WB: Cut-in angle (default: 45°)
RB: Cut-in radius (no input: no element, positive value: first cut
radius, negative value: chamfer)
E: Reduced feed for the plunge cut and the thread chamfer
(default: Feed per revolution F)
U: Grind. overs. for the area of the cylinder (default: 0)
Further forms:
Further information:
Undercuts can only be executed in orthogonal,
paraxial contour corners along the longitudinal axis
Parameters that are not programmed are
automatically calculated by the control from the
standard table
Access to the technology database:
Machining operation: Finishing
Affected parameters: F, S, E
158
"smart.Turn unit", Page 78
smart.Turn units | Units – Finishing
HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017