5 Programming Tool Movements
4
5.4 Path Contours - Cartesian Coordinates
Circles and circular arcs - General information
The TNC 370 can control two machine axes
simultaneously to move the tool in a circular path.
Circle Center CC
You can define a circular movement by entering its
center CC.
A circle center can also serve as reference (pole) for
polar coordinates.
Direction of Rotation DR
When there is no tangential transition to another
contour element, enter the mathematical direction
of rotation DR, where
l
a clockwise direction of rotation is mathematical-
ly negative: DR-
l
a counterclockwise direction of rotation is
mathematically positive: DR+
Y
d
Y
l
J
Y
cc
Fig. 5.18: Circular arc and circle center
Fig. 5.19: Circle center coordinates
Fig. 5.20: Direction of rotation for circular movements
5-14
TNC 370
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