HEIDENHAIN TNC 620 (340 56x-02) ISO programming - Manual (Page 154)

154 Programming: Programming Contours
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: G02/G12
Counterclockwise direction of rotation: G03/G13
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 159).
Pre-positioning
G02/G12
G03/G13
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.