HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 155)

TNC 425/TNC 415 B/TNC 407 5–56
5 Programming Tool Movements
5.6 Contours – FK Free Contour Programming
Fig. 5.48: Auxiliary points on a free arc
5
.
.
.
X
Y
P2
5 15
5
20
P1
C1
X
Y
P3X
P3Y
P1X
P1Y
FC P2X
P2Y
CC
Auxiliary points
Auxiliary points are entered for arcs in the same way as for straight lines.
You can program a third auxiliary point for an arc.
Example for exercise: Auxiliary points on an arc
Known data for circular arc C1:
Auxiliary points P1, P2 with the coordinates for
P1 : P1X = 5 mm P1Y = 5 mm
P2 : P2X = 15 mm P2Y = 20 mm
For clarity, the drawing contains only the data
described above.
Initiate the dialog:
Circular arc without tangential connection
Enter the coordinates of the first auxiliary point:
AUXILIARY POINT 1 X-COORDINATE ?
Enter the X-coordinate of the auxiliary point P1, P1X = 5 mm.