HEIDENHAIN TNC 620 (340 56x-01) - Manual (Page 171)

HEIDENHAIN TNC 620 171
6.5 P
a
th Cont
ours—P
o
lar 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 (see
“Fundamentals,” page 178).
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
Line LP + Straight line Polar radius, polar angle of the
straight-line end point 172
Circular arc CP + Circular path around circle
center/pole CC to arc end point Polar angle of the arc end point,
direction of rotation 173
Circular arc CTP + Circular arc with tangential
connection to the preceding
contour element Polar radius, polar angle of the
arc end point 173
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 174