Siemens SINUMERIK 840D sl Operating Manual page 70

Setting up the machine
2.4 Settings for the machine
Procedure
...
Resetting the actual value
Note
Irreversible active zero offset
The current active zero offset is irreversibly deleted by this action.
70
1. Select the "JOG" mode in the "Machine" operating area.
2. Press the "Set ZO" softkey.
- OR -
Press the ">>", "REL act. vals" and "Set REL" softkeys to set position
values in the relative coordinate system.
3. Enter the new required position value for X, Y or Z directly in the actual
value display (you can toggle between the axes with the cursor keys)
and press the "Input" key to confirm the entries.
- OR -
Press softkeys "X=0","Y=0" or "Z=0" to set the relevant position to zero.
- OR -
Press softkey "X=Y=Z=0" to set all axis positions to zero simultaneously.
Press the "Delete active ZO" softkey.
The offset is deleted permanently.
Operating Manual, 03/2013, 6FC5398-7CP40-3BA1
Milling