HEIDENHAIN CNC PILOT 640 - Contours in the XY Plane; Starting Point of Contour in XY Plane G170-Geo; Line Segment in XY Plane G171-Geo

DIN/ISO Programming for the Y axis | Contours in the XY plane
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HEIDENHAIN | User's Manual smart.Turn and DIN Programming | 12/2017
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6.2 Contours in the XY plane
Starting point of contour in XY plane G170-Geo
G170 defines the Start point of a contour in the XY plane.
Parameters:
X: Start point of contour (radius)
Y: Start point of contour
PZ: Start point (polar radius)
W: Start point (polar angle)
Line segment in XY plane G171-Geo
G171 defines a line segment in a contour of the XY plane.
Parameters:
X: Final point (radius)
Y: Final point
AN: Angle to X axis
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
PZ: Final point (polar radius; reference: workpiece datum)
W: Final point (polar angle; reference: workpiece datum)
AR: Incr.angle to foregoer ARi (AR corresponds to AN)
R: Line length
Programming:
X, Y: Absolute, incremental, modal or ?
ANi: Angle to the subsequent element
ARi: Angle to the previous element