HEIDENHAIN iTNC 530 211
6.5 Path Contours—Polar Coordinates
Circular path G12/G13/G15 around pole I, J
The polar coordinate radius R is also the radius of the arc. R is defined
by the distance from the starting point to the pole I, J. The last
programmed tool position will be the starting point of the arc.
Direction of rotation
îš„ In clockwise direction: G12
îš„ In counterclockwise direction: G13
îš„ Without programmed direction: G15. The TNC traverses the circular
arc with the last programmed direction of rotation
U Polar-coordinates angle H: Angular position of the
arc end point between –99 999.9999° and
+99 999.9999°
U Direction of rotation DR
Example NC blocks
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