HEIDENHAIN TNC 640 User Manual page 678

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Potentiometer settings

Caution: Danger for the operator!

Activating the handwheel does not automatically activate the

potentiometers of the handwheel; rather the potentiometers

on the operating panel of the control remain active. After an

NC start on the handwheel, the control immediately begins

with machining or with axis positioning, even though the

potentiometers on the handwheel are set to 0 %. There is a risk

of death to anybody inside the working space!

Before using the handwheel, set the potentiometers of the

operating panel to 0 %

When using the handwheel, always also activate the

potentiometers of the handwheel

The potentiometers of the machine operating panel continue to be

active after you have activated the handwheel. If you want to use

the potentiometers on the handwheel, proceed as follows:

Press the CTRL and handwheel keys on the HR 5xx at the

The control shows the soft-key menu for selecting the

potentiometers in the handwheel's display.

Press the HW soft key to activate the handwheel

potentiometers

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:

Press the CTRL and handwheel keys on the HR 5xx at the

The control shows the soft-key menu for selecting the

potentiometers in the handwheel's display.

Press the KBD soft key to activate the potentiometers of the

machine operating panel

The control issues a warning if the handwheel potentiometers are

still active after the handwheel has been deactivated.

Manual Operation and Setup | Moving the machine axes

HEIDENHAIN | TNC 640 | ISO Programming User's Manual | 10/2017