Tracking Issues

Below is a list of possible reasons why a belt is not tracking correctly.

• The belt tension is too low.
• Sanding pressure is too high or too low.
• Uneven sanding pressure.
• Contact roll or idler roll is worn.
• There is dust between the belt and the contact roll.
• Variation in workpiece thickness.
• The alignment between the contact roll and the idler roll is incorrect.
• The belt stretched due to improper work feeding.
• Platen is out of position.
• The damaged belt edge interfered with the tracking mechanism. Check for humidity imbalance. Also, try increasing belt tension.
• Belt tension overrides the tracking cylinder.
• The tracking mechanism is defective or out of adjustment.
• • The electric eye photocell is defective or dusty. Clean regularly.
  • Microswitch failure or damage
  • Air jet-controlled tracking mechanisms may fail due to a drop in line pressure. Check jets for blockage.
• The contact roll is tapered.
• The belt was joined or cut incorrectly.
• The idler crown area is worn (narrow belts only).

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