HEIDENHAIN ITNC 530 User Manual page 225

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 (see
"Fundamentals" on page 234).
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
Line LP
Circular Arc CP
Circular Arc CTP
Helical interpolation
HEIDENHAIN iTNC 530
Tool movement
+ Straight line
+ Circular path around circle
center/pole CC 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
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