HEIDENHAIN TNC 640 (34059x-01) - Manual (Page 181)

HEIDENHAIN TNC 640 181
6.2 F
undamentals of P
a
th F
unctions
Direction of rotation DR for circular movements
When a circular path has no tangential transition to another contour
element, enter the direction of rotation as follows:
Clockwise direction of rotation: DR-
Counterclockwise direction of rotation: DR+
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. Activate it beforehand in a straight-line block (see "Path
Contours—Cartesian Coordinates", page 191) or approach block
(APPR block, see "Contour Approach and Departure", page 183).
Pre-positioning
CC
CC
DR–
DR+
X
Z
Y
Danger of collision!
Before running a part program, always pre-position the
tool to prevent the possibility of damaging it or the
workpiece.