HEIDENHAIN NC 124 - Manual (Page 30)

3 Manual Operation and Setup
30 TNC 124
Selecting datum points
The TNC 124 can store up to 99 datum points in a datum table. In
most cases this will free you from having to calculate the axis travel
when working with complicated workpiece drawings containing sev-
eral datums, or when several workpieces are clamped to the ma-
chine table at the same time.
For each datum point, the datum table contains the positions that
the TNC 124 assigned to the reference point on the scale of each
axis (REF values) during datum setting. Note that if you change the
REF values in the table, this will move the datum point.
The TNC 124 displays the number of the current datum at the lower
right of the screen.
To select the datum:
In all operating modes:
➤ Press MOD and go to the soft key row containing
Datum Table.
➤ Choose the soft key Datum Table.
➤ Select the datum you are using from the datum table.
➤ Leave the datum table:
Press MOD again.
In the MANUAL OPERATION and POSITIONING WITH MDI
modes of operation:
➤ Press the vertical arrow keys.
The machine manufacturer determines whether “quick
datum selection” via arrow keys is enabled on your
TNC.
In the PROGRAMMING AND EDITING / PROGRAM RUN modes
of operation:
➤ You can also select a datum point by entering the command
“DATUM” in a program.
MOD