User's Manual TNC 360 (from 259 900-11) - heidenhain

5 Programming Tool Movements
5.4 Path Contours – Cartesian Coordinates
Circular path CR with defined radius
5-20
The tool moves on a circular path with the radius R.
Input
• Coordinates of the arc end point
• Arc radius R
• Direction of rotation DR
• To program a full circle with CR you must enter two successive CRblocks.
• The distance from the starting point to the end point cannot be
larger than the diameter of the circle.
• The maximum permissible radius is 30 m (9.8 ft).
Arc radius R
Starting point S and end point E can be connected
by four different arcs with the same radius.
The arcs differ in their curvatures and lengths.
To program a large semicircle enter the radius R
with a negative sign (R0).
R
CCA
R
S E
Fig. 5.26: Circular path from S to E with
radius R
S1=E2
Fig. 5.27: Full circle with two CR-blocks
CCA>180°
Fig. 5.28: Circular arcs with central angles greater than and less than
180°
S
R
E
S
CCA
E
R R
E1=S2
CCA