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Abrasive Dulling Premature

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Ask Tech - Abrasives Dulling Premature

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.

III.        Abrasives dulling prematurely

            1.  Grit too fine.

            2.  Excessive sanding pressure.

            3.  Belt too stiff for application, request more flexible product.

            4.  Wrong product for application.

            5.  Excessive belt speed.

            6.  Contact roll not aggressive enough (greater groove-to-land ration needed).

            7.  Excessive wheel speed (flapwheel or brush wheel).

IV.       Belts creasing

            1.  Belt too flexible (specify stiffer backing).

            2.  Grit too fine.

            3. Contact roll is tapered (cone shaped). Redress roll. 

            4.  Contact roll and idler roll not parallel.

            5.  Contact roll or idler roll worn in the center portion.

            6.  Belt tension too low (or less commonly, too high).

            7.  Dirt on the contact roll or idler roll.

            8.  Tracking mechanism damaged or defective.

            9.  Worn bearing on the contact roll or idler roll.

         10.  Uneven belt stretch due to improper work feeding.

         11.  Belt not installed on machine straight.

         12.  Moisture imbalance across the belt.  Check humidity!

                        - hang belts on proper storage rack for at least 24 hrs prior to use.

                        - paper belts are more susceptible than cloth belts.

                        - belts should be removed from machine, or at least the belt tension should be removed during shut-down periods if belt  remains on the machine.

        13.  Belt improperly joined.

        14.  Drop in air line pressure affecting tracking or tensioning mechanisms.


 

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