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Operation
Symptom
Possible Cause
Machine vibrates
1. Machine not stable on workbench.
excessively (non-
2. Incorrect grinding belt tension.
motor related).
3. Broken/defective grinding belt.
Grains easily rub off
1. Grinding belt has been stored in damp
belt.
environment.
2. Grinding belt has been smashed or folded.
3. Grinding belt is too old.
Belt tracks to one
1. Belt tracking not set correctly.
side under load.
Deep sanding
1. Excessive feed pressure while grinding.
grooves or
2. Workpiece held still for too long against
scratches in
grinding belt.
workpiece.
3. Grinding belt too coarse.
4. Platen worn.
Snake-shaped
1. Grinding belt loaded up with residue.
marks on
2. Grinding belt damaged.
workpiece.
3. Platen noticeably worn.
Belt clogs quickly.
1. Excessive feed pressure while grinding.
2. Grinding belt worn or damaged.
3. Workpiece material is prone to belt-
clogging, such as soft aluminum.
Sanded surface not
1. Table not perpendicular to platen.
square.
Workpiece
1. Workpiece not supported sufficiently against
frequently gets
table/rest.
pulled out of hand
2. Leading edge or sharp edges grabbing into
when sanding.
grinding belt.
Model G0898 (Mfd. Since 12/19)
Possible Solution
1. Remount/shim machine (Page 14).
2. Make sure tension lever is in tensioning position
(Page 20).
3. Replace grinding belt (Page 20).
1. Replace damaged grinding belt (Page 20). Store
grinding belt in a cool, dry area.
2. Replace damaged grinding belt (Page 20). Do not
bend or fold grinding belt.
3. Use new grinding belt.
1. Ensure belt tracking is set correctly (Page 21).
1. Reduce workpiece feed pressure.
2. Keep workpiece moving while grinding.
3. Use finer grit grinding belt (Page 20).
4. Replace platen.
1. Clean grinding belt (Page 25).
2. Replace grinding belt (Page 20).
3. Replace platen.
1. Clean grinding belt (Page 25), and then reduce
workpiece pressure.
2. Replace grinding belt (Page 20).
3. Reduce feed pressure. Use coarser-grit belt (Page
20).
1. Adjust table tilt to be perpendicular with platen.
1. Use work table/rest, or push block to support
workpiece.
2. Change angle or orientation of workpiece so
workpiece is not digging into oncoming direction of
grinding belt.
-29-
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