HEIDENHAIN TNC 122 User Manual - Manual (Page 21)

3 Manual Operation and Setup
TNC 122 21
Setting the datum: Moving to the datum surface and entering the actual value
To set the datum, you move the tool to the respective datum sur-
faces and enter the tool position as datum.
Example: Setting the datum in the X and Z axes
Working plane: X / Y
Tool axis: Z
Tool radius: R = 5 mm
Sequence for
datum setting
in this example:
X, Z
Procedure
⇒ ⇒ ⇒ ⇒ ⇒ Insert the tool.
⇒ ⇒ ⇒ ⇒ ⇒ Enter the tool data.
⇒ ⇒ ⇒ ⇒ ⇒ Switch on the spindle, e.g. with the miscellaneous
function M 3.
Mode of operation: MANUAL OPERATION
Y
X
1
Z
Touch surface with the tool.
Select the X axis. X
5
ENT
Enter the position of the tool center (X = – 5 mm)
and
transfer the X coordinate of the datum.
D A T U M X =
X =
Touch the top surface with the tool.
Select the Z axis. Z
0
ENT
D A T U M Z =
Z =
Enter the position of the tool tip (Z = 0 mm)
and
transfer the Z coordinate to the display.
1