Checking The Potentiometers - HEIDENHAIN iTNC 530 Service Manual

24.2.2 Checking the Potentiometers

The override potentiometers of the HR 420 are active up to NC software version as soon as the
handwheel operation was selected!
The potentiometers of the keyboard are then inactive.
As of NC software version 34049x-xx (with smarT.NC programming surface), the
potentiometers of the keyboard are still active after selecting the handweel operating mode.
To test the handwheel potentiometers, you must switch over correspondingly:


Potentiometers on
HR 420 active
If you have activated the potentiometers on the handwheel, you must reactivate the
potentiometers of the machine operating panel before deselecting the handwheel. Proceed as
follows:


24 – 394
DANGER
By switching from the keyboard to the HR 420 and vice versa, the feed rate or the spindle
speed can change depending on the corresponding potentiometer setting.
Press the CTRL and Handwheel keys in the HR 420. --> The TNC shows the soft-key menu
for selecting the potentiometers on the handwheel display.
Press the HW soft key to activate the handwheel potentiometer.
Press the CTRL and Handwheel keys in the HR 420. --> The TNC shows the soft-key menu
for selecting the potentiometers on the handwheel display.
Press the KBD soft key to activate the potentiometers of the machine operating panel.
HEIDENHAIN Service Manual iTNC 530