HEIDENHAIN CNC Pilot 4290 - Manual (Page 100)

4 DIN PLUS 88
Continued
Undercut contour G25-Geo
Generates the following undercut contours in paraxial inside contour
corners. Program G25 after the first axis-parallel element.
Parameters
H:
Type of undercut – default: 0
■ H=4: Undercut type U
■ H=0, 5: Undercut type DIN 509 E
■ H=6: Undercut type DIN 509 F
■ H=7: Thread undercut DIN 76
■ H=8: Undercut type H
■ H=9: Undercut type K
Undercut DIN 509 E (H=0, 5)
Parameters
I:
Depth of undercut (radius)
K: Width of undercut
R: Undercut radius (in both corners of the undercut)
W: Undercut angle
If you do not enter parameters, the CNC PILOT calculates them from
the diameter (see ”
11.1.2 Undercut Parameters DIN 509 E”).
Undercut form U (H=4)
Parameters
I:
Depth of undercut (radius)
K: Width of undercut
R: Inside radius (in both corners of recess) – default: 0
P: Outside radius/chamfer – default: 0
■ P>0: Radius of rounding
■ P<0: Width of chamfer
4.5 Geometry Commands
Calling the contour macro (example):
N..G1 Z.. /longitudinal element
N..G25 H..I..K.. .. /Undercut contour
N..G1 X.. /Next surface element