HEIDENHAIN TNC 310 (286 140) Pilot - Manual (Page 8)

8
Fundamentals
Circle Center and Pole: CC
The circle center (CC) must be entered to program circular tool move-
ments with the path function C (see page 17). CC is also needed to
define the pole for polar coordinates.
CC is entered in Cartesian coordinates*.
An absolutely defined circle center or pole is always measured from
the workpiece datum.
An incrementally defined circle center or pole is always measured from
the last programmed position of the workpiece.
Angle Reference Axis
Angles – such as a polar coordinate angle PA or an angle of rotation
ROT – are measured from the angle reference axis.
Working plane Ref. axis and 0° direction
X/Y X
Y/Z Y
Z/X Z
*Circle center in polar coordinates: See FK programming