HEIDENHAIN TNC 360 User Manual - Manual (Page 55)

TNC 360 2-17
2 Manual Operation and Setup
Fig. 2.15: Probing an inside cylindrical
surface to find the center
2.5 Setting the Datum with the 3D Touch Probe System
Circle center as datum
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 automatically probes the inside wall in all four coordinate axis
directions.
For incomplete circles (circular arcs) you can choose the appropriate
probing directions.
Select the CIRCLE CENTER = DATUM function.
Move the touch probe to a position approximately in the center of the circle.
CIRCLE CENTER = DATUM
X + X – Y + Y –
The probe touches four points on the inside of the circle.
DATUM X =
Enter the first coordinate of the datum, here in the X axis.
Select the second coordinate.
DATUM Y =
Enter the second coordinate of the datum, here in the Y axis.
Terminate the probe function.
4 x
1 e.g. 0
ENT
END
I
Y
X
X–
X+
Y+
Y–
8
10
e.g.
8
ENT