HEIDENHAIN TNC 620 (81760x-01) ISO programming - Manual (Page 187)

Fundamentals of Path Functions 6.2
6
TNC 620 | User's Manual for DIN/ISO Programming | 3/2014
187
Radius compensation
The radius compensation must be in the block in which you
move to the first contour element. You cannot activate radius
compensation in a circle block. It must be activated beforehand in
a straight-line block (See "Path contours - Cartesian coordinates",
page 197).
Pre-position
Danger of collision!
Before running a part program, always pre-position
the tool to prevent the possibility of damaging it or
the workpiece.