HEIDENHAIN TNC 640 (34059x-05) - Manual (Page 234)

Programming: Programming contours
6.5 Path contours – Polar coordinates
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TNC 640 | User's Manual
HEIDENHAIN Conversational Programming | 1/2015
6.5 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 235
+ Circular path around circle
center/pole to arc end point Polar angle of the arc end
point, direction of rotation 236
+ Circular arc with tangential
connection to the preceding
contour element Polar radius, polar angle of the
arc end point 236
+ 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 237