HEIDENHAIN TNC 620 User Manual page 178

5
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
Setting the handwheel sensitivity
The handwheel sensitivity determines which path an axis takes per
revolution of the handwheel. The handwheel sensitivity results from
the defined handwheel speed of the axis and the speed level used
internally by the control. The speed level describes a percentage of
the handwheel speed. The control calculates a specific handwheel
sensitivity value for each speed level. The resulting handwheel
sensitivity values are directly selectable with the handwheel arrow
keys (only if incremental jog is not active).
Taking the example of a defined handwheel speed of 1, the following
handwheel sensitivity values result from the speed levels for the
respective units of measure:
Resulting handwheel sensitivity levels in
mm/revolution and degrees/revolution:
0.0001/0.0002/0.0005/0.001/0.002/0.005/0.01/0.02/0.05/0.1/0.2/0.5/1
Resulting handwheel sensitivity levels in in/revolution:
0.000127/0.000254/0.000508/0.00127/0.00254/0.00508/0.0127/0.0254/0.0508/0.127/0.254/0.508
Examples for resulting handwheel sensitivity values:
Defined handwheel speed
10
10
10
178
Speed level
0.01 %
0.01 %
0.0127 %
HEIDENHAIN | TNC 620 | User's Manual for Setup, Testing and Running NC Programs | 01/2022
Setup | Moving the machine axes
Resulting handwheel sensitivity
0.001 mm/revolution
0.001 degrees/revolution
0.00005 in/revolution