Wilton 4300A Benutzerhandbuch

18

1.  Motor is defective
2.  Voltage is too low

3.  Switch is defective
4.  Branch circuit fuse is blown or
     the circuit breaker is tripped

5.  Branch is shut down for service

6.  Open circuit in the wiring

1. Belt is slipping

1. Replace the belt.

Abrasive belt or disc slows
down although motor keeps
running at working speed

Motor stalls easily

Motor will not run

Poor tracking

1.  Tracking is out of adjustment.
2.  Too much belt tension.

3.  Not enough belt tension.

4.  Belt is jointed improperly.

5.  Lack of crown on the drive roller.

6.  Worn bearings.

1.  Adjust the belt tracking.
2.  Loosen the tension until the belt is just
      taut.
3.  Tighten the tension until the belt is more
      taut.
4.  Check the belt for an irregular seam or
      shape.
5.  Remove the belt and put a straight edge
     along the drive roller. There should be a
     slight crown (high spot toward the middle
      of the roller.) If the crown has worn away,
      replace the roller.
6.  Check all the bearings for excessive heat
     or loose shafts. Replace if necessary.

Unsteady belt

1.  Slack in the abrasive belt.

1.  Adjust the belt tension.

Short belt life

1.  Excessive pressure applied while
    grinding.

2.  Working on only one side of the belt
     or only in one area of the disc.
3.  Incorrect abrasive material or grit
     size.

1.  Allow the belt to do the cutting. Excessive
     pressure only dulls the grit and removes it
     from the cloth.
2.  Use all the surface areas of the abrasive
     cloth.
3.  Check with your abrasives supplier for rec
    ommendations on the type and coarse
     ness of the abrasive required for the
     workpieces you are sanding or grinding.

1.  Replace the motor.
2.  Check the power supply for the proper
     voltage.
3.  Replace the switch.
4.  Determine the reason for the blown fuse
     or tripped circuit breaker -- then replace
     the fuse or reset the breaker.
5.  Check all personnel and machines on
     the branch to be certain someone has
     not shut down the branch for service. DO
    NOT replace the fuse or reset the breaker
      unless you are certain no personnel are
     working on the machines, wires or con
     trols in the circuit.
6.  Inspect all the wire connections for loose
     or open connections.

1.  Check for proper voltage at the motor
      -- correct as necessary.
2.  Replace the blown fuse.

3.  Check for proper connections.

1.  Low voltage.

2.  Fuse is blown (three phase
     motors only.)
3.  Improper wiring.

CAUTION: For all of the electrical faults and corrections in the above table Wilton recommends the use of a qualified
and licensed electrician for all circuit tracing, diagnosis and repair.