MR-Conveyor-Maintenance-Guide.pdf - 第27页
EN - 0034 Rev. F MR Conveyor Maintenance G uide 27 3/12/2024 Electrical T rou bleshooting Procedure: 1) Check all electrical connections. Make sure that all pl ugs are connected properly. 2) Make sure that it is an elect…
EN-0034 Rev. F MR Conveyor Maintenance Guide 26
3/12/2024
Phase Considerations
For most applications, Quickdraw Systems uses low voltage, Brushless DC 3-Phase
Motors and Control Cards. Occasionally, a faulty phase may be the problem.
Signs of a bad phase include but are not limited to:
a) Intermittent Motor Failure.
b) The ability to start the Motor by turning the Collar Clamp or Motor Shaft
after initial powering-up of the Conveyor. After the Motor has been finger
started, the Motor turns on its own, but again may intermittently have a
start up problem.
To remedy this situation, follow the Electrical Troubleshooting guide on the following page.
Make certain to turn the Conveyor on and off multiple times to make sure that the real
cause of the problem is found.
EN-0034 Rev. F MR Conveyor Maintenance Guide 27
3/12/2024
Electrical Troubleshooting
Procedure:
1) Check all electrical connections. Make sure that all plugs are connected properly.
2) Make sure that it is an electrical problem by eliminating the Conveyor as a possible
cause of failure:
a) Measure the current draw (See Page 20).
b) Hand power the Conveyor.
c) Attach the Conveyor to a Motor Cable that is connected to a different,
functioning Motor Control Card. * Use a different Conveyor Control Box if
possible.
d) Measure the current draw.
3) If the Conveyor turns by hand, and operates within an acceptable current draw range
when connected to a different Motor Control Card, the problem lies somewhere in the
original electrical system.
Possible causes include:
a) Electrical connections.
b) The Motor.
c) The Motor Cable.
d) The Power Supply.
4) To check the Motor, plug the electrical system in question into a different Conveyor. If
the new Conveyor operates properly, the Motor on the original Conveyor is probably
the cause and should be replaced.
5) To check the Motor Cable, switch Cables with a Conveyor that is operating properly.
If the problem disappears, check the original Cable for bad electrical connections or
cuts. If the original Cable cannot be repaired, then it must be replaced.
6) Unplug the Conveyor Control Box and check for loose connections or cut wires within
the Control Box. Be careful not to create additional problems by pulling too forcefully
on the wires. If you believe that you have found loose wiring and have taken steps to
reconnect them properly, plug in the Control Box and measure the current draw of
the original system. If the current draw is within the acceptable range, you have fixed
the problem. If not, proceed to step #7.
7) If you still have not found the problem, replace the Motor Card using the Wiring
Diagram on Pages 21 - 24 as a guide.3
8) If this does not eliminate the problem, please call a Quickdraw Systems
representative for support at 1-800-473-8837 or (952) 935-6921.
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3/12/2024
Troubleshooting
Important: When performing any maintenance, make certain that the Drive Assembly is
free to turn before applying power to the Motor.
Problem Possible Cause(s) Solution
Conveyor Rollers
are not turning.
a) Is the Motor turning?
b) Is the Drive Belt OK?
c) Are the Covers on
tightly?
a) If not, refer to Motor problems.
b) Check the Drive Belt.
c) Loosen and retighten the
Covers to ensure that the
Guides are in contact with
Timing Belt.
The Motor is not
turning.
a) Is a fuse blown?
b) Is the speed adjustment
turned down?
c) Is there a faulty
connection?
d) Is the Motor Control
Card receiving 24VDC?
a) Replace blown fuse.
b) Adjust the speed on the Motor
Control Card.
c) Check to see that the Motor is
plugged in and no wires are loose on
the Motor Control Card.
d) Use a volt meter and check the
potential across terminal numbers 4
and 5 of the Control Card.
The Motor will turn,
but only when
started by hand.
a) If the Motor will not start
on it’s own, but will run if
manually started, the
Motor Control Card is
likely at fault.
b) Is it a faulty Motor or
Motor Control Card?
c) Is it a bad wire
connection?
a) Replace the Control Card.
b) Try another Motor on this Control
Card and/or this Motor on another
Control Card. Replace the defective
component.
c) Check the connections between the
Motor Control Card and the Motor.
Repair any loose connections.
Motor Fuses
continually blow.
(High Current)
a) Is the Conveyor
assembled correctly?
b) Is it a bad Motor or Motor
Control Card?
a) Check that the Drive Assembly turns
easily by hand.
b) Try another Motor on this Control
Card and/or this Motor on another
Control Card. Replace the defective
component.