HEIDENHAIN TNC 407 (280 580) ISO Programming - Manual (Page 148)

5 - 1 5 TNC 426/TNC 425/TNC 415 B/TNC 407
5 Programming Tool Movements
Fig. 5.21: Direction of rotation for circular movement
Fig. 5.20: Circle center coordinates
Fig. 5.19: Circular arc and circle center
5.4 Path Contours – Cartesian Coordinates
Y
X
Z
G02
G03
Y
X
Z
J
I
Y
X
Y
X
J
I
Circles and circular arcs
Here the TNC moves two axes simultaneously in a
circular path relative to the workpiece.
Circle center I, J, K
You can define the circle center for circular move-
ment.
A circle center also serves as reference (pole) for
polar coordinates.
Direction of rotation
When a circular path has no tangential transition to
another contour element, enter the mathematical
direction of rotation:
• Clockwise direction of rotation is mathematically
negative: G02
• Counterclockwise direction of rotation is
mathematically positive: G03