HEIDENHAIN MANUALplus 620 229
4.10 Linear and Circular Movements
Circular arc G12/ G13
G12/G13 moves the tool in a circular arc at the feed rate to the “end
point.” The center dimensioning is absolute. Direction of rotation (see
help graphic):
G12: In clockwise direction
G13: In counterclockwise direction
Parameters
X Final point (diameter)
Z Final point
R Radius (0 < R <= 200 000 mm)
I Absolute center point (radius)
K Absolute center point
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
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
BE Special feed factor for chamfer/rounding arc (default: 1)
Special feed rate = active feed rate * BE (0 < BE <= 1)
Programming X, Z: Absolute, incremental, modal or “?”
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