HEIDENHAIN SW 54843x-02 DIN Programming - Manual (Page 203)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 203
4.4 Cont
our f
o
rm
elements
Undercut contour G25-Geo
G25 generates the undercut contours listed below. The undercuts are
only possible in inside contour corners in which the transverse
element is parallel to the X axis. Program G25 after the first element.
You specify the undercut type in parameter H.
Undercut type U (H=4)
Example: Call G25-Geo type U
. . .
N.. G1 Z-15 [longitudinal element]
N.. G25 H4 I2 K4 R0.4 P-0.5 [type U]
N.. G1 X20 [transverse element]
. . .
Parameters
H
Undercut type U: H=4
I Undercut depth (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 arc
 P<0: Chamfer width
BE, BF, BD, BP and BH (see "Machining attributes for form elements"
on page 193)
FP
Do not machine element (only necessary for TURN PLUS):
 1: Do not machine undercut