HEIDENHAIN TNC 620 (73498x-01) - Manual (Page 194)

194 Programming: Programming contours
6.5 P
a
th cont
ours—P
olar coor
dinat
e
s
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 Page 195
Circular arc CP + Circular path around circle
center/pole to arc end point Polar angle of the arc end
point, direction of rotation Page 196
Circular arc CTP + Circular arc with tangential
connection to the preceding
contour element Polar radius, polar angle of
the arc end point Page 196
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 Page 197