Microprocessor-based vibratory feeder control unit MVFCU-3
MVFCU-3 is the specialized vibratory measurer control system with non-volatile memory. This system is compatible with the all the existent types of microcontrollers, allowing the usage of the device as part of CAM automated control systems.
Object-oriented programming of the unit allows to complete any task concerning the precision matirial dosage system design.
The device's power supply voltage is ~380V AC.
The output circuit voltage is ~220V AC.
Contactor control output voltage is ~220 V AC.
The smooth adjustment of feeder's speed is made via phase-pulse control of external bidirectional thyristor, chosen on the basis of the features of the actuating device.
The LED indication is avaliable:
- Unit power supply voltage;
- Indication of inputs;
- Indication of contactor controlvoltage supply;
- Mode indication:
- «WORK» - glowing or blinking indicates the operation mode or setup;
- «SPEED» - glowing indicates speed 1 or 2 of the vibratory feeder.
There are tuning buttons on the unit, allowing to alter the timing angles, restriction of delay angles and to switch speeds.
Unit operation description.
The signals from prestarting circuits are transmitted to the "Ready" input.
The signal putting the unit into operation is transmitted to the "Work" input.
Provided there is voltage in the "Ready" and "Work" inputs, the "Work" output signal triggers the operation of power contactor.
After that, the impulses appear in the bidirectional thyristor output, and the current in the vibratory feeder coil begins to gradually increase to the value defined during the setup.
In case of occurence of the «Speed 2» signal the impulses in the bidirectional thyristor control output change and the "Speed 2" output signal is indicated. The current in the coils is gradually adjusted accordingly to the set speed.
After the removal of input signal «Speed 2» the output indication is switched off and the current is reduced to the original value.
After the removal of the "Work" signal, the voltage is removed and the contactor is switched off.