HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 120)

5-21 TNC 425/TNC 415 B/TNC 407
5 Programming Tool Movements
Fig. 5.27: Incremental coordinates for a circle center
X e.g.
2
e.g.
Y
e.g.
ENT
0
1 e.g. 0
+/
ENT
5.4 Path Contours - Cartesian Coordinates
CC
Y
X
IY
CC
IX
Entering the CC as a relative value
If you enter the circle center with relative coordi-
nates, you have defined it in terms of the last
programmed position.
• The circle center CC also serves as pole for polar coordinates.
• CC defines a position as a circle center. The resulting contour is located on the circle, not on the circle center.
To program a circle center (pole):
COORDINATES ?
Select the coordinate axis, for example X.
Enter the coordinate for the circle center in this axis, for example
X=20 mm.
Select the second coordinate axis, for example Y.
Enter the coordinate of the circle center, for example Y=-10 mm.
Resulting NC block: CC X+20 Y-10