MATTHIESEN Magic Finger Bagger, Owner'S Manual

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3-12 Maintenance & Troubleshooting MN605
Tachometers:
DC, AC and digital outputs are available. These can be mounted to our motors
or shipped separately. Tachs help the SCR control achieve more precise speed
regulation than by armature feedback alone.
Transparent Brush Inspection:
For easy brush inspection and commutation monitoring without disassembly of
the motor.
Winding RTD
RTD (Resistance Temperature Detector) devices are used to measure or
monitor the temperature of the motor winding during operation.
Winding Thermocouple s
Used to measure or monitor winding temperatures.
Winding Thermostat
Temperature device that activates when winding temperatures are excessive.
Used with an external circuit to warn of excessive winding temperature or to
shut down a motor.
Reflash Instructions
Instructions to reflash the residual magnetism for Lifting Magnet Generators only .
These generators are self − exciting. If voltage will not build up, it is possible the residual
magnetism is insufficient to initiate excitation. This procedure is to restore sufficient
residual magnetism to self excite.
Note: Loss of residual magnetism can be caused by misconnection (reversing the
connections) of F1 and F4.
1. Disconnect F1 and F4. All other leads may remain connected.
2. Connect 24 to 40VDC power source positive lead to F1 and negative to F4.
DC source may be batteries, a DC welder (not AC) or rectified AC.
3. Drive generator at rated RPM.
4. Measure the voltage across A1 and A2. Voltage should be 150 to 200% of F1
to F4 voltage. When A1 to A2 voltage level reaches this level (approximately
30 seconds) carefully remove the source leads, an arc may be present during
disconnect.
5. Stop the generator.
6. Reconnect F1 and F4 as shown in the DC Generator Connection Diagram.
Rotation is viewed from opposite drive end (commutator end) A1 is positive for
CCW rotation. A2 is positive for CW rotation. S1 is always negative.
Shown for CCW (counterclockwise) rotation, (viewed from opposite drive end or
commutator end). For CW (clockwise) rotation, interchange leads A1 and A2.
DC Generator Connection Diagram
Compound Wound Short Shunt Connection
Shunt Fields
ARM
COMM Field
Series Field
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