Operation Manual

HEIDENHAIN CNC PILOT 4290 173
4.10 Front and Rear Face Contours
Circular arc in front/rear face contour G102/
G103-Geo
G102/G103 defines a circular arc in a front or rear face contour.
Direction of rotation (see help graphic):
 G102: In clockwise direction
 G102: In counterclockwise direction
Parameters
X End point in polar coordinates (diameter)
C End point in polar coordinates (angular dimension)
XK End point in Cartesian coordinates
YK End point in Cartesian coordinates
R Radius
I Center in Cartesian coordinates
J Center in Cartesian coordinates
B Chamfer/rounding. Defines the transition to the next contour
element. When entering a chamfer/rounding, program the
theoretical end point.
 No entry: Tangential transition
 B=0: No tangential transition
 B>0: Rounding radius
 B<0: Chamfer width
Q Point of intersection. End point if the circular arc intersects a
line segment or another circular arc (default: 0):
 Q=0: Near point of intersection
 Q=1: Far point of intersection
Programming
 X, XK, YX: Absolute, incremental, modal or “?”
 C: Absolute, incremental or modal
 I, J: Absolute or incremental
 End point must not be the starting point (no full circle).