HEIDENHAIN CNC PILOT 640 - Circular Arc of Turning Contour G2-;G3-Geo

DIN/ISO programming | Basic elements of turning contour
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HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
249
Circular arc of turning contour G2-/G3-Geo
G2 and G3 define a circular arc in a contour with incremental center
dimensioning.
Direction of rotation:
G2: In clockwise direction
G3: In counterclockwise direction
Parameters:
X: Final point (diameter value)
Z: Final point
R: Radius
I: Center, incremental – distance from starting point to center
point (radius value)
K: Center, incremental – distance from starting point to center
point
Q: Intersect. pt. or Final point if the line segment intersects a
circular arc (default: 0)
0: Near point of intersection
1: Far point of intersection
BR: Chamf./round. – defines the transition to the next contour
element
When entering a Chamf./round., program the theoretical end
point.
No entry: Tangential transition
BR = 0: No tangential transition
BR > 0: Rounding radius
BR < 0: Width of chamfer
FP: Do not machine the element (only necessary for
TURN PLUS)
1: Basic element (line) do not machine
2: Overlay element (chamfer or rounding arc) do not
machine
3: Basic/overlay element do not machine
BE, BF, BD, BP and BH.
Further information: "Machining attributes for form elements",
Page 246
Programming:
X and Z absolute, incremental, modal or ?