HEIDENHAIN TNC 370 User Manual page 270

9 3D Touch Probes
e
9.2 Touch Probe Cycles in the MANUAL and ELECTRONIC HANDWHEEL Operating Modes
Setting the datum at a circle center
With this function you can set the datum at the center of bore holes,
circular pockets, cylinders, journals, circular islands etc.
Inside circle
The TNC 370 automatically probes the inside wall in all four coordinate
axis directions.
For incomplete circles (circular arcs) you can choose the appropriate
probing direction.
Y
1
Y+
,c) x- . .
I@
0
1.c x+
Y-
I
8
X
Fig. 9.11: Probing an inside cylindrical
surface to find the center
4
d
-
Move the touch probe to a position approximately in the center of the circle
The probe touches four points on the inside of the circle.
J
Enter the first coordinate of the circle center, for example in the
X axis. Confirm with ENT.
Select the second coordinate.
4
Enter the second coordinate of the circle center for example in the
Y axis. Confirm with ENT. --
,
e.g.
B .'
Terminate the probe function.
9-12
TNC 370