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Belt Not Tracking Properly

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Ask Tech - Belts Not Tracking Properly

In our continuing effort to create a reference for our customers on troubleshooting information, below please find our problems for this issue. If you clip this section or just keep this page in a file, it will build a troubleshooting reference for your use in the future.  These check lists are good regardless of what type of material you are sanding, as they are problem oriented in regard to the abrasive/machinery as opposed to workpiece based.

VII.      Belts not tracking

            1.  Belt tension too low.

            2.  Sanding pressure too high or too low. 

            3.  Uneven sanding pressure.

            4.  Contact roll or idler roll worn. 

            5.  Dust between belt and contact roll.

            6.  Variation in workpiece thickness.

            7.  Alignment between contact roll and idler roll incorrect.

            8.  Belt stretched due to improper work feeding.

            9.  Platen out of position.

         10.  Damaged belt edge interfering with tracking mechanism. Check for humidity imbalance.
                  Try increasing belt tension.

         11.  Belt tension overriding the tracking cylinder.

         12.  Tracking mechanism defective or out of adjustment.

                        - electric eye photo cell defective or dusty, clean regularly

                        - microswitch failure or damage

                       - air jet controlled tracking mechanism may fail due to drop in

                           line pressure. Check jets for blockage.

         13.  Contact roll tapered.

         14.  Belt joined or cut incorrectly.

         15.  Idler crown area worn (narrow belts only).


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