HEIDENHAIN ITNC 530 - 6-2010 DIN-ISO PROGRAMMING User Manual page 209

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
Function Path function key
Straight line G10,
G11
Circular arc G12,
G13
Circular arc G15
Circular arc G16
Helical interpolation
HEIDENHAIN iTNC 530
Tool movement
+ Straight line
+ Circular path around circle
center/pole to arc end point
+ Circular path corresponding
to active direction of rotation
+ 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,
Polar angle of the circle end
point
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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