When your machine is under power and the belt is not turning there are several causes that could be at Fault:
1. Roller is actually turning but belt is slipping on the roller
a: Not enough tension on the belt
SOLUTION: Increase belt tension with adjustment bolt on ends of conveyor rails
b: Belt is not tracking properly and is physically Stuck against one side of the conveyor rail.
SOLUTION: Physically move belt back to center of roller by hand and adjust tracking with adjustment bolts on ends of conveyor rails.
2.Chain has fallen off the drive sprockets
a: Sprockets are misaligned and caused chain to come off
SOLUTION: Loosen Sprockets and realign then reinstall chain
b: Master Link has broken causing chain to come apart
SOLUTION: Replace Master link
3. Drive Sprocket Slipping on Roller.
a: Set screws on securing sprocket to roller are loose and letting sprocket turn freely without turning the roller.
SOLUTION: Align sprocket with motor sprocket and tighten BOTH set screws on the large sprocket with an allen wrench
4. Speed Control Circuit Board not sending power to the motor.
a. Fuse protecting the board has blown
SOLUTION: Replace blown fuse with one of proper size and rating.
b. (on 12 VDC models) Power supply sending DC Power to the Circuit Board has failed.
SOLUTION: Unplug the wire connection to the motor, back near the drive motor. With a voltage meter set to read DC voltage measure
voltage on the plug coming from the control box. Have an assistant turn the speed knob up and down. If working properly
you should see the voltage change from a low of about 2 volts when the speed knob is at the slowest setting....to a high of
about 10.5 volts when the speed knob is set to the highest setting.
IF you have 0 volts then you need to move back to the control box and check the voltage coming from the power supply to
the speed control circuit board. This should measure 12 Volts DC. If it does then your Speed Control Circuit Board has
and needs replaced. If you read 0 Volts DC between the Power Supply and the Speed Control Board then you have a bad
POWER SUPPLY and it will need replaced.
c. (on 90 VDC models) Circuit board has failed
SOLUTION:Unplug the wire connection to the motor, back near the drive motor. With a voltage meter set to read DC voltage measure
voltage on the plug coming from the control box. Have an assistant turn the speed knob up and down. If working properly
you should see the voltage change from a low of about 5 volts when the speed knob is at the slowest setting....to a high of
about 85 volts when the speed knob is set to the highest setting.
IF you have 0 volts then your speed control circuit board has failed and will need to be replaced.
5. Gear Motor Failure
a. If your speed control is good then then problem is going to be either an electrical or mechanical failure of the gear motor. In either case the
Solution is the same:
SOLUTION: If your speed control system is sending the proper voltage to the motor and the motor is not responding the only
alternative is to replace the motor.
No matter if you currently have an older 90 volt system using either a Dayton, Bison or Minarik motor.....OR.....if you have ANY 12 volt system Workhorse is suggesting that you retro fit your motor and speed controller to our current design which is a 90 volt system. To order go to our On-Line store and search for part number 42067R-90V-RETRO. This will get you a full conversion kit at a deeply discounted price. If you have an urgent
Need and require expedited shipping contact our technical service department at 800-778-8779 Option 2 or open a SUPPORT Ticket here.