-42-
For Machines Mfd. Since 12/21
South Bend Tools
Model SB1102
TROUBLESHOOTING
Grinding,
screeching, or
rubbing noise when
sanding drums are
powered up.
1.
Drum bearings insufficiently
lubricated.
1.
Lubricate drum bearings (Page 28).
2.
Drum bearings need replacement.
2.
Replace drum bearings (Page 39).
Workpiece slips on
conveyor or kicks
out.
1.
Pressure rollers not properly
adjusted.
1.
Properly adjust pressure roller height (Page 34).
2.
Sanding depth of cut or feed rate
too high.
2.
Reduce depth of cut or reduce feed rate (Page 21).
Conveyor belt slips
or does not track
correctly.
1.
Conveyor belt loose or worn.
1.
Properly tension/replace conveyor belt (Page 35).
2.
Workpiece too heavy.
2.
Use lighter workpiece.
3.
Belt tracking not properly adjusted
(Page 35).
3.
Properly adjust belt tracking (Page 35).
4.
Belt tension not properly adjusted
(Page 35).
4.
Properly adjust belt tension (Page 35).
5.
Too much pressure from pressure
rollers.
5.
Reduce pressure roller pressure (Page 34).
Workpiece pulls
to one side during
sanding operation.
1.
Sanding drum(s) not perpendicular
to feed direction.
1.
Adjust sanding drum(s) perpendicular to feed
direction (Page 30).
2.
Sanding drum(s) not parallel with
table.
2.
Adjust sanding drum(s) parallel to table (Page 31).
Machine lacks
power; drums stop
turning under load.
1.
Too much pressure on sanding
drum.
1.
Reduce depth of cut (Page 21).
2.
Belts loose or worn.
2.
Tension/replace belts (Page 37).
Machine has
vibration or noisy
operation.
1.
Sandpaper is loose.
1.
Inspect and reinstall sandpaper (Page 23).
2.
Motor or component loose.
2.
Replace damaged or missing bolts/nuts or tighten if
loose.
3.
Machine not stable on floor.
3.
Relocate/shim machine; adjust machine mounts;
tighten mounting bolts.
4.
Belts worn or loose.
4.
Inspect/replace belts with new matched set
(Page 37); realign pulleys if necessary (Page 38).
5.
Pulley loose.
5.
Secure pulley on shaft.
6.
Motor fan rubbing on fan cover.
6.
Fix/replace fan cover; fix/replace loose/damaged fan.
7.
Drum bearings at fault.
7.
Replace drum bearings (Page 39).
8.
Centrifugal switch/contact points
at fault.
8.
Adjust centrifugal switch/clean contact points.
Replace either if at fault.
9.
Motor bearings at fault.
9.
Test by rotating shaft; rotational grinding/loose
shaft requires bearing replacement.
Machine slows
when sanding,
making squealing
noise, especially on
start-up.
1.
Belts loose or worn.
1.
Tension/replace belts (Page 37).
Symptom
Possible Cause
Possible Solution
Short V-belt
lifespan.
1.
Belts improperly tensioned.
1.
Properly tension belts (Page 37).
2.
Pulleys not aligned correctly.
2.
Align pulleys (Page 38).
