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American Sanders Technology Sanders are designed and manufactured to the most rigid tolerances. How-
ever, after a finishing cut it is possible to see "chatter" or "waves".
The best guarantee to remove the chatter is to finish the floor with a
rotating horizontal sander, such as American Sanders Technology's
Sander 16.
To minimize chatter when using a belt sander the following steps should be taken:
1.) DRUM MARKS ....are caused by the operator lowering the drum to the floor without forward
traverse. These marks should be removed by cutting at a 45 degree angle to the mark. Cutting
at the mark while maintaining the same path will only increase the mark depth and width.
2.) EXTREMELY LIGHT CUTS ....may reveal high spots on the paper/contact wheel and cause
chatter.
1.) DEBRIS ....on contact wheel or tension roller, even the slightest of build up, will cause chatter. Inspect
and clean (hand sand) any debris on these surfaces. Periodically inspect these elements and blow off
ends and face of contact wheel. Blow off any accumulation on or about the tracking mechanism to
prevent any debris from breaking loose, lodging between abrasive and contact wheel, and eventually
adhering to the contact wheel.
2.) IMBALANCE ....on contact wheel will cause chatter. Remove any debris which may have accumulated
on ends or face of contact wheel.
3.) V-BELTS ....of poor quality or which have become damaged to either the outer cover or tensile
members will leave chatter. Excessive belt tension may cause chatter to appear by taking-up the
elasticity of the belt thereby revealing any imperfections in the belt or pulleys. Apply only enough
tension to the belts to prevent slippage. Only use genuine American Sanders Technology replacements
to minimize this effect.
4.) ABRASIVE ....of poor quality, exposed to moisture or humidity, or has suffered damage, will leave
chatter marks. Always store abrasive belts on edge in a cardboard box in a dry location. Do not back
flex or overflex abrasive belt at seam. Never allow abrasive to develop a crease from storage. Avoid
re-using abrasive belts, as the abrasive may take on moisture from humidity. If chatter becomes
present, first replace abrasive belt from another lot, to insure that the abrasive is not at fault.
AMERICAN SANDERS TECHNOLOGY Classic 8 Operator's Manual
Chatter - Wave Prevention
Chatter - Causes and Prevention
Page 29
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