HEIDENHAIN MANUALPLUS 620 User Manual page 209

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 Final point in polar coordinates (diameter)
C Final point in polar coordinates (angular dimension)
XK Final point in Cartesian coordinates
YK Final point in Cartesian coordinates
R Radius
I Center in Cartesian coordinates
J Center in Cartesian coordinates
BR Chamfer/rounding. Defines the transition to the next contour
element. When entering a chamfer/rounding, program the
theoretical end point.
No entry: Tangential transition
BR=0: No tangential transition
BR>0: Rounding radius
BR<0: Width of chamfer
Q Point of intersection. End point if the circular arc intersects a
line segment or another circular arc (default: 0):
0: Near point of intersection
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).
HEIDENHAIN MANUALplus 620 209