HEIDENHAIN SW 54843x-03 DIN Programming - Manual (Page 205)

HEIDENHAIN MANUALplus 620, CNC PILOT 640 205
4.3 Basic cont
our elements
Circular arc of turning contour G12/G13-Geo
G12/G13 defines a circular arc in a contour with absolute center
dimensioning. Direction of rotation (see help graphic):
 G12: In clockwise direction
 G13: In counterclockwise direction
Parameters
X
End point of contour element (diameter value)
Z End point of contour element
I Center (radius dimension)
K 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 input: Tangential transition
 BR=0: No tangential transition
 BR>0: Radius of rounding
 BR<0: Width of chamfer
PZ End point of contour element (polar radius; reference:
workpiece zero point)
W End point of contour element (polar angle; reference:
workpiece zero point)
PM Center point (polar radius; reference: workpiece zero point)
WM Center point (polar angle; reference: workpiece zero point)
AR
Starting angle (tangential angle to rotary axis)
AN End angle (tangential angle to rotary axis)
BE, BF, BD, BP and BH (see „Machining attributes for form
elements” on page 201)
FP
Do not machine element (only necessary for TURN PLUS):
 0: Do not machine basic element (straight line)
 1: Do not machine overlay element (e.g. chamfer or rounding)
 2: Do not machine basic/overlay element
Programming
 X, Z: Absolute, incremental, modal or "?"
 ARi: Angle to the previous element
 ANi: Angle to the subsequent element