25 – 408 HEIDENHAIN Service Manual iTNC 530 HSCI
Activating the potentiometers on HR 520:
After selection of the handwheel mode, the potentiometers of the keyboard are still active.
To test the handwheel potentiometers, you have to activate them:
8 Pick up the handwheel.
8 Press and hold the CTRL key, then actuate the HANDWHEEL key.
--> The menu Select override: appears in the handwheel display.
8 Press the HW soft key to activate the handwheel potentiometers.
--> The information Handwheel override active appears on the control screen.
Figure: Active potentiometers on HR 520
Deactivating the potentiometers on HR 520:
If you want to deactivate the HR 520 handwheel after the tests described, first reactivate the
potentiometers of the keyboard.
Proceed as follows:
8 Pick up the handwheel.
8 Press and hold the CTRL key, then actuate the HANDWHEEL key.
--> The menu Select override: appears in the handwheel display.
8 Press the KBD (keyboard) soft key to activate the potentiometers of the keyboard.
8 Press the HANDWHEEL key.
--> The window Handwheel active on the control screen is closed, the handwheel is deselected.
These PLC words can also be shown in the integrated oscilloscope.
--> See ”Checking the potentiometers” on page 23 – 376.
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