HEIDENHAIN TNC 620 (73498x-02) - Manual (Page 206)

Programming: Programming contours
6.5 Path contours – Polar coordinates
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TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013
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 207
Circular arc
CP
+ Circular path around
circle center/pole to
arc end point Polar angle of the arc
end point, direction of
rotation 208
Circular arc
CTP
+ Circular arc with
tangential connection
to the preceding
contour element Polar radius, polar angle
of the arc end point 208
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 209