HEIDENHAIN TNC 620 Programming Station, User Manual

Page: 264 / 695

Programming contours
6.5 Path contours – Polar coordinates
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HEIDENHAIN | TNC 620 | ISO Programming User's Manual | 9/2016
6.5 Path contours – Polar coordinates
Overview
With polar coordinates you can define a position in terms of its
angle
H
and its distance
R
relative to a previously defined pole
I, J
.
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 265
+ Circular path around circle
center/pole to arc end point Polar angle of the arc end
point, 266
+ Circular path corresponding to
active direction of rotation Polar angle of the circle end
point 266
+ Circular arc with tangential
connection to the preceding
contour element Polar radius, polar angle of the
arc end point 266
+ 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 267