HEIDENHAIN TNC 407 (280 580) ISO Programming - Manual (Page 155)

TNC 426/TNC 425/TNC 415 B/TNC 407 5 - 2 2
5 Programming Tool Movements
Fig. 5.31: Convex path
Fig. 5.32: Concave path
5.4 Path Contours – Cartesian Coordinates
1 0
2 Y
X
0 2 G
G02 G41 (R<0)
Contour curvature and direction of rotation
The direction of rotation determines the type of arc:
• Convex (curving outward), or
• Concave (curving inward)
G03 G41 (R>0)
To program a circular arc with a defined radius:
Circle, Cartesian, clockwise.
Enter the coordinates of the arc end point,
for example X = 10 mm, Y = 2 mm.
Enter the radius of the arc, for example R = 5 mm, and determine the
size of the arc using the sign (negative in this example).
Further entries, if necessary:
• Radius compensation
• Feed rate
• Miscellaneous function
Resulting NC block: G02 G41 X+10 Y+2 R–5
ENT
R
+/
5