Sanding Operations - Grizzly G0459 Owner's Manual

Sanding Operations

Symptom Possible Cause
Machine stalls or 1. Dust collection ducting is at fault.
is underpowered.
2. Low power supply voltage.
3. Belt is slipping.
4. Motor connection is wired incorrectly.
5. Plug or receptacle is at fault.
6. Pulley or sprocket is slipping on shaft.
7. Motor bearings are at fault.
8. Machine is undersized for the task.
9. Motor has overheated.
10.Centrifugal switch is at fault.
11.Motor is at fault.
Machine lacks 1. V-belt loose.
power; drum
stops turning
2. Too much pressure on pressure rollers.
under load.
Machine slows 1. V-belt loose.
when sanding,
making a squeal-
ing noise, espe-
2. V-belt worn out.
cially on start-up.
Loud repetitious 1. Pulley setscrews or keys are missing or loose.
noise coming
from machine.
2. Motor fan is hitting the cover.
3. V-belt is defective.
Vibration when 1. Loose drum pillow block bearings.
sanding.
2. Worn drum pillow block bearings.
G r i n d i n g , 1. Drum bearings lack sufficient grease.
screeching, or
rubbing noise
when sanding
2. Drum bearings are worn and need replace-
drum is powered
ment.
up.
-24-
Possible Solution
1. Seal all leaks, size ducts correctly, eliminate bends,
and refer to Dust Collection Basics Handbook (ISBN
0-9635821-2-7) for further recommendations.
2. Make sure all hot lines and grounds are operational
and have correct voltage on all legs.
3. Replace bad belt, align pulleys, and re-tension.
4. Correct motor wiring (see Page 40).
5. Test power plug and receptacle for good contact and
correct wiring.
6. Replace loose pulley and shaft.
7. Rotate motor shaft for noisy or burnt bearings, repair/
replace as required.
8. Use new sandpaper with appropriate grit, and reduce
the feed rate/depth of sanding.
9. Unobstructed motor cooling air flow, let motor cool,
and reduce workload on machine.
10. Adjust or replace the centrifugal switch.
11. Test, repair or replace motor.
1. Tighten V-belt (Page 26).
2. Reduce pressure roller pressure (Page 31).
1. Tighten V-belt (Page 26).
2. Replace V-belt (Page 27).
1. Inspect keys and setscrews. Replace or tighten if nec-
essary.
2. Adjust fan cover mounting position, tighten fan, or
shim fan cover.
3. Replace V-belt (Page 27).
1. Tighten drum pillow block bearings.
2. Replace drum pillow block bearings.
1. Grease the pillow block bearings (Page 21).
2. Replace the drum bearings.
G0459 12" Drum Sander