8
photoelectric cell is the “reflection” type. The component fixed on the arm sends a signal that, if the
machine is closed and aligned, is reflected by the retroreflector located on the valve-block support.
Then the signal comes back to the photoelectric cell on the arm, that sends a positive impulse to the
electric panel.
In order to be able to drive or stabilize the machine BOTH THE PHOTOELECTRIC CELLS
MUST SEND A POSITIVE SIGNAL TO THE ELECTRIC PANEL.
This condition is signalled by a lamp on the control panel (translation
consent
lamp).
The alignment of the machine is indicated by the two arrows on the valve-block support.
.
2.2 Functioning during the aerial works
The aerial operations are usually controlled by the valve-block in the basket.
There is also the possibility IN EMERGENCY SITUATIONS, to control the aerial part from the
ground through the valve-block located on the turret.
