HEIDENHAIN TNC 640 User Manual page 676

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Selecting the axis to be moved

You can activate the principal axes X, Y, Z and three other axes

defined by the machine manufacturer directly through the axis

keys. Your machine tool builder can also place the virtual axis VT

directly on one of the free axis keys. If the virtual axis VT is not on

one of the axis keys, proceed as follows:

Press the handwheel soft key F1 (AX)

The control shows all active axes on the handwheel display. The

currently active axis flashes.

Select the desired axis with the handwheel soft keys F1 (->) or

F2 (<-) and confirm with the F3 (OK) handwheel soft key

Refer to your machine manual.

The machine manufacturer can also configure the

turning spindle (option number 50) as an optional axis.

You can select whether only the position display should be shown,

or the position display with the offset value from the global

program settings:

Display Pos with F4: Only position display

Display P/O with F4: Position display with offset value

Setting the handwheel sensitivity

The handwheel sensitivity determines which path an axis takes per

revolution of the handwheel. The sensitivity levels are predefined

and are selectable with the handwheel arrow keys (only when

incremental jog is not active).

Selectable sensitivity levels:

0.001/0.002/0.005/0.01/0.02/0.05/0.1/0.2/0.5/1 [mm/revolution or

degrees/revolution]

Selectable sensitivity levels:

0.00005/0.001/0.002/0.004/0.01/0.02/0.03 [in mm/revolution or

degrees/revolution]

Manual Operation and Setup | Moving the machine axes

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