Preparation and setup
57
6.8.2
Electrical potentiometer
In the case of the electrical flow control valve, the push-off speed is adjusted via an electrical stepper
motor on the control valve. The stepper motor is controlled from the vehicle cab via a potentiometer.
Procedure:
For normal operation, the hand wheel must be turned from
position "2" in clockwise direction up to the stop.
In the case of an electrical system fault, the valve can be
opened manually by turning the hand wheel anti-clockwise.
At position "3", the switch box and potentiometer are
connected.
1
Adjusting screw for pressure
sequence valve
2
Adjusting wheel for flow rate of
push-off cylinder
3
Electrical flow control valve for
push-off cylinder
Fig. 54
:
Electrical flow control valve
The flow control valve is correctly set in the factory and must not be changed.
For objective and operation, see 7
Due to design reasons, different oil flow rates exist in the push-off cylinders, which
become active one after the other. Therefore, to ensure a constant push-off speed,
the oil flow rate must be adjusted when the moving panel has completed 30% and
60% of its travel. For orientation purposes, markings are provided on the side walls of
the spreading trough to indicate the position of the moving panel. This allows the
operator to see when he must adjust the oil flow rate. On the potentiometer, the basic
setting must be reduced by two scale marks in each case.
Fig. 55
:
Control unit for electrical potentiometer
2
1
3
