Grizzly G1140 Owner's Manual page 35

Edge Sander Operations
symptom
Machine vibrates excessively (non-motor
related).
Sanded surface not square.
Deep sanding grooves or scores in
workpiece.
Abrasive grit rubs off the belt easily.
Sanding belt surfaces clog quickly or
burn.
Burn marks on workpiece.
Glazed sanding surfaces.
Workpiece frequently gets pulled out of
your hand.
Hard to install belts, belt slaps against
platen, slips on rollers.
Weak tension spring, excessive play in
belt tension lever.
Belt has difficulty tracking correctly.
Belt tension lever stiff.
g1140/g1531 6" X 80" edge sander
possible Cause
1. stand not stable on floor.
2. incorrect sanding belt tension.
3. Weak or broken tension spring.
4. idler roller is too loose.
5. Broken/defective sanding belt.
1. table not perpendicular to belt.
1. sandpaper too coarse for the desired
finish.
2. Workpiece sanded across the grain.
3. too much sanding
workpiece.
4. Workpiece held still against the belt.
1. sanding belt has been stored in an
incorrect environment.
2. sanding belt has been folded or
smashed.
1. too much pressure against belt.
2. sanding softwood.
3. sanding belt too fine.
1. using too fine of sanding grit.
2. using too much pressure.
3. Work held still for too long.
1. sanding wet stock.
2. sanding stock with high residue.
1. not supporting the workpiece against
the stop (g1140).
2. starting the workpiece on a leading
corner.
tension adjusted incorrectly.
spring tension incorrect.
parallel tracking incorrect.
1. shaft spring tension incorrect.
2. tension shaft needs lubrication.
3. idler roller-to-platen relationship incor-
rect.
possible solution
1. reposition to level surface, or shim
stand.
2. Make sure tension lever is engaged
(see page 34).
3. replace spring.
4. adjust idler roller.
5. replace sanding belt.
1. adjust table tilt (see page 22).
1. use a finer grit sanding belt.
2. sand with the grain.
force on 3. reduce pressure on workpiece while
sanding.
4. Keep workpiece moving while sand-
ing on the belt.
1. store sanding belt away from extreme-
ly dry/hot or damp/wet temperatures.
2. store sanding belt flat, not folded or
bent.
1. reduce pressure on workpiece while
sanding.
2. use different stock. or, accept the
characteristics of the stock and plan
on cleaning/replacing belts frequent-
ly.
3. use coarser grit sanding belt.
1. use a coarser grit sanding belt.
2. reduce pressure on workpiece while
sanding.
3. do not keep workpiece in one place
for too long.
1. dry stock properly before sanding.
2. use different stock. or, accept the
characteristics of the stock and plan
on cleaning/replacing belts frequent-
ly.
1. use back stop to support workpiece
(Model g1140).
2. start workpiece on a trailing corner.
adjust tensioner (see page 34).
reset spring tension (see page 35).
adjust parallel tracking (see page 36).
1. adjust shaft spring tension (see page
35).
2. lubricate tension shaft (see page
31).
3. adjust idler roller-to-platen relation-
ship (see page 39).
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