HEIDENHAIN MANUALPLUS 620 - Circular Arc of Turning Contour G2 G3-Geo

HEIDENHAIN MANUALplus 620 183
4.3 Basic Contour Elements
Circular arc of turning contour G2/G3-Geo
G2/G3 defines a circular arc in a contour with incremental center
dimensioning. Direction of rotation (see help graphic):
 G2: In clockwise direction
 G3: In counterclockwise direction
Example: G2-, G3-Geo
Parameters
X Final point of contour element (diameter value)
Z Final point of contour element
I Center (distance from starting point to center as radius)
K Center (distance from starting point to center)
R Radius
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, BF, BD, BP and BH (see “Machining attributes for form
elements” on page 181)
Programming X, Z: Absolute, incremental, modal or “?”
. . .
FINISHED
N1 G0 X0 Z-10
N2 G3 X30 Z-30 R30 Target point and radius
N3 G2 X50 Z-50 I19.8325 K-2.584 Target point and center, incremental
N4 G3 Xi10 Zi-10 R10 Target point (incremental) and radius
N5 G2 X100 Z? R20 Unknown target point coordinate
N6 G1 Xi-2.5 Zi-15
. . .