HEIDENHAIN CNC Pilot 4290 Pilot - Manual (Page 16)

16
Undercut contour G25-Geo
G25 generates the following undercut contours in paraxial contour
corners. The meaning of the parameters depends on the type of
undercut.
If you program G25
■ after the reference element, the undercut is turned at the end of the
reference element.
■ before the reference element, the undercut is turned at the
beginning of the reference element.
Calling the contour macro (example):
N..G1 Z.. /Linear element as reference
N..G25 H..I..K.. .. /Undercut contour
N..G1 X.. /Next surface element
Parameters
Continued
Undercut form U (H=4)
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 the rounding
■ P<0: width of the chamfer
F
o
rm
elements
fo
r cont
our descr
iption
H: Type of undercut – default: 0
■ H=4: undercut form U
■ H=0, 5: undercut form DIN 509 E
■ H=6: undercut form DIN 509 F
■ H=7: thread undercut DIN 76
■ H=8: undercut form H
■ H=9: undercut form K