HEIDENHAIN TNC 320 (77185x-01) - Manual (Page 208)

Programming: Programming contours
6.5 Path contours – Polar coordinates
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TNC 320 | User's Manual
HEIDENHAIN Conversational Programming | 3/2014
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
Function Path function key Tool movement Required input Page
Straight line LP + Straight line Polar radius, polar angle
of the straight-line end
point
209
Circular arc CP + Circular path around
circle center/pole to
arc end point
Polar angle of the arc
end point, direction of
rotation
210
Circular arc CTP + Circular arc with
tangential connection
to the preceding
contour element
Polar radius, polar angle
of the arc end point
210
Helical
interpolation
+ 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
211