HEIDENHAIN TNC 640 - Path Contours - Polar Coordinates; Overview

Programming Contours | Path contours – Polar coordinates
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HEIDENHAIN | TNC 640 | Conversational Programming User's Manual | 10/2017
7.5 Path contours – Polar coordinates
Overview
With polar coordinates you can define a position in terms of its
angle PA and its distance PR relative to a previously defined pole
CC.
Polar coordinates are useful with:
Positions on circular arcs
Workpiece drawing dimensions in degrees, e.g. bolt hole circles
Overview of path functions with polar coordinates
Path function key Tool movement Required input Page
+ Straight line Polar radius, polar angle of the
straight-line end point
311
+ Circular path around circle
center/pole to arc end point
Polar angle of the arc end point,
direction of rotation
312
+ Circular arc with tangential
connection to the preceding
contour element
Polar radius, polar angle of the
arc end point
312
+ Combination of a circular and a
linear movement
Polar radius, polar angle of the
arc end point, coordinate of the
end point in the tool axis
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