-36-
Model G0920 (Mfd. Since 10/20)
Operation
Symptom
Possible Cause
Possible Solution
Sandpaper
clogs quickly.
1. Sanding depth too deep/feed rate too slow.
2. Workpiece has high moisture content or sap.
3. Incorrect sandpaper grit.
4. Poor dust collection.
5. Sandpaper loaded with sawdust and gum.
6. Worn sandpaper.
1. Reduce sanding depth (
Page 25)/increase feed rate
(
Page 27).
2. Use different stock, or accept characteristics and plan
on cleaning (
Page 33)/replacing (Page 29) sandpaper
frequently; remove applied finishes before sanding.
3. Use correct sandpaper grit for operation (
Page 29).
4. Unclog ducts; close gates to improve suction; re-
design dust collection system.
5. Clean (
Page 33)/replace (Page 29) sandpaper.
6. Replace sandpaper (
Page 29).
Sandpaper
comes off of
drum or is
loose.
1. Sandpaper not properly wrapped onto drum.
2. Sandpaper not cut to correct dimensions.
3. Torn or damaged sandpaper.
4. Foreign object in workpiece.
5. Sanding drum not parallel to table.
1. Re-install sandpaper (
Page 29).
2. Use sandpaper cut to correct dimensions (
Page 30).
3. Replace sandpaper (
Page 29).
4. Sand only clean workpieces.
5. Align sanding drum to table (
Page 41).
Sandpaper
tears off drum.
1. Sanding drum not parallel with table.
2. Sandpaper overlapping.
3. Sanding depth is too deep.
1. Adjust sanding drum parallel to table (
Page 41).
2. Re-install sandpaper (
Page 29).
3. Reduce sanding depth (
Page 25).
Burn marks on
workpiece.
1. Using too fine of sanding grit for sanding
depth.
2. Sandpaper loaded with sawdust and gum.
3. Feed rate too slow.
4. Sandpaper not properly wrapped onto drum.
5. Worn sandpaper.
1. Use coarser grit sandpaper (
Page 29) or decrease
sanding depth (
Page 25).
2. Clean (
Page 33)/replace (Page 29) sandpaper.
3. Increase feed rate (
Page 27).
4. Re-install sandpaper (
Page 29).
5. Replace sandpaper (
Page 29).
Glazed
workpiece
surface after
sanding.
1. Sanding wet stock.
2. Sandpaper loaded with sawdust and gum.
3. Sanding stock with high amount of applied
finishes.
1. Only sand stock that has moisture content below 20%.
2. Clean (
Page 33)/replace (Page 29) sandpaper.
3. Use different stock, or accept characteristics and plan
on cleaning (
Page 33)/replacing (Page 29) sandpaper
frequently; remove applied finishes before sanding.
Workpiece slips
on conveyor or
kicks out.
1. Sanding depth too deep/feed rate too fast.
2. Conveyor belt dirty or worn.
3. Pressure rollers not properly adjusted.
1. Reduce sanding depth (
Page 25)/feed rate (Page 27).
2. Clean/replace conveyor belt (
Page 39).
3. Properly adjust pressure roller height (
Page 44).
Conveyor
belt slips or
does not track
correctly.
1. Conveyor belt tension not properly adjusted.
2. Conveyor belt tracking not properly adjusted.
3. Conveyor belt worn.
4. Workpiece too heavy.
1. Properly adjust conveyor belt tension (
Page 38).
2. Properly adjust conveyor belt tracking (
Page 38).
3. Replace conveyor belt (
Page 39).
4. Use lighter workpiece.
Symptom
Possible Cause
Possible Solution
Machine has
vibration or
noisy operation.
1. Motor, motor mount, or component loose.
2. Stand feet not adjusted properly.
3. Loose/worn drum bearings.
4. Motor fan rubbing on fan cover.
5. Centrifugal switch/contact points at fault.
6. Motor bearings at fault.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Adjust stand feet to stabilize machine.
3. Tighten/replace drum bearings.
4. Fix/replace motor fan cover or loose/damaged fan.
5. Adjust centrifugal switch/clean contact points. Replace
either if at fault.
6. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Motor & Electrical (Cont.)
Summary of Contents for G0920
Page 60: ......