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Troubleshooting

Trouble     Probable Cause Remedy
Sander will not startNo incoming powerCheck that the sander is connected to power, fuses are not blown or circuit breakers are not tripped
  Low voltageCheck the voltage at the power source
  Loose wiring Inspect and remedy any loose connections on sander
  Start switch is defectiveReplace the start switch
  Motor is defectiveReplace the motor
The sanding belt clogs too quicklyGrit of the sanding belt is too fineChoose a larger grit of sanding paper
  Too much material is being sanded offReduce the amount of material being removed
  The wood is too oilyChoose different stock
  Too much dirt or glue on the woodChoose cleaner stock
  Wood is too moistAllow wood to dry before sanding
Sanding belt will not run, or slips on the rollerEmergency stop button is engagedDisengage the stop button
  Limit switches are activatedPosition the sanding belt so it is between the limit switches
  Insufficient air pressure causing the belt to slip on rollersMake sure air pressure regulator is set at 75 to 80 PSI (Refer to page 9 in the EZ Sander Manual)
  Dust or debris on the conveyor rollersClean the conveyor rollers
Sanding belt keeps tripping limit switchTracking adjustment/oscillation is not correctSet tracking correctly
Watch video on tracking the abrasive belt
  Dust covering the photo eyeCheck and clean dust from the photo eye
Machine takes too long to stop after the emergency switch is activatedAir pressure is too lowSet air pressure to 75 to 80 PSI
  Brake pads are wornReplace brake pads
Grinding noise when brake is activatedBrake pads are wornReplace brake pads (rotor may need turning also)
Too much roundingToo much material is being removed, too tightlyReduce the amount of material making the contact drum press being removed
The front end of the stock is thinner than the rearRear hold down roller is too low in relation to the contact drumRaise the rear pressure bar (Refer to pages 16-17 in the EZ Sander Manual)
The rear end of stock is thinner than the frontFront hold down roller is too low in relation to the contact drumRaise front pressure bar (Refer to page 16 in the EZ Sander Manual)
Uneven thickness between the left and right sides of the workpieceTable is not positioned correctly in relation to the contact drumAdjust table until it is parallel left to right (Refer to pages 17-18 in the EZ Sander Manual)
  Front hold down roller is not in the correct position in relation to the contact drumAdjust the front hold down roller so that it is parallel (Refer to page 16 in the EZ Sander Manual)
  Graphite strip and felt pad are won outReplace graphite strip and felt pad (Refer to page 14 in the EZ Sander Manual)
  Conveyor belt is wornReplace the conveyor belt (contact an APEX Service Technician)
Uneven thickness between the front and rear ends of the workpieceFeed rate is too highReduce the feed rate (Refer to page 16 in the EZ Sander Manual)
  Too much stock removalReduce the amount of material being removed
  Grit of sanding belt is too fineUse a larger grit sanding belt
  Unequal position of the hold down rollersAdjust the hold down roller to produce pressure on the stock
  Table is not parallel front to backAdjust the table until it is parallel front to back (Refer to pages 17-18 in the EZ Sander Manual)
Workpiece slips on on conveyor beltThere is not enough pressure between the hold down roller and the workpieceIncrease pressure between the hold down roller and the workpiece
  There is too much dust or debris on the conveyor beltClean the conveyor belt with compressed air
  Rear pressure bar is too low, halts the work pieceRaise the rear hold down roller until the proper contact is achieved
Straight strip of notches or grooves in the workpieceHold down roller is dirty Clean the hold down rollers
  Contact drum is scratchedReplace the contact drum
  Graphite strip and felt pad are wornReplace graphite and pad
“Snake” marks on workpieceLocal damage to the sanding belt Replace the sanding belt
Straight parallel running stripes over the entire width of the workpieceJoint of the sanding belt is too thick or is openRepair joint or replace the sanding belt
Glossy spots on the woodSanding belt is too oldReplace with new sanding belt
Watch video on replacing sanding belt