Path Contours – Polar Coordinates - HEIDENHAIN TNC 620 User Manual

6
Programming: Programming contours
6.5 Path contours – Polar coordinates
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
Straight line LP
Circular arc CP
Circular arc CTP
Helical
interpolation
198
Path function key Tool movement
+ Straight line
+ Circular path around
circle center/pole to
arc end point
+ Circular arc with
tangential connection
to the preceding
contour element
+ Combination of a
circular and a linear
movement
Required input
Polar radius, polar angle
of the straight-line end
point
Polar angle of the arc
end point, direction of
rotation
Polar radius, polar angle
of the arc end point
Polar radius, polar angle
of the arc end point,
coordinate of the end
point in the tool axis
TNC 620 | User's Manual
HEIDENHAIN Conversational Programming | 5/2013
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