Grizzly G0970 Owner's Manual page 46

Motor & Electrical (Cont.)
Symptom Possible Cause
Machine has 1. Motor or component loose.
vibration or
noisy operation.
2. Machine incorrectly mounted on stand.
3. V-belt worn, loose, pulleys misaligned, or belt
slapping cover.
4. Pulley loose.
5. Motor mount loose/broken.
6. Motor fan rubbing on fan cover.
7. Blade damaged or warped.
8. Centrifugal switch needs adjustment/at fault.
9. Motor bearings at fault.
Operation
Symptom Possible Cause
Blade or teeth 1. Blade tension is too tight.
break/crack.
2. Blade is incorrect for application.
3. Excessive feed rate/pressure.
4. Cutting corners too sharply.
5. Blade is dull or worn/weld at fault.
6. Blade is tracking incorrectly.
7. Blade guides/support bearing not adjusted
properly, allowing blade teeth to hit guides
while cutting.
Blade slows, 1. Blade contacting table insert.
smokes, shows
overheating or
2. Blade guides are misadjusted or worn.
wears on one
side.
3. Blade installed backwards.
4. Too much side pressure when feeding
workpiece.
5. Wheels are out of alignment.
6. Fence not parallel with blade.
7. Dull, bell-mouthed, or incorrect blade.
8. V-belt loose, worn, or slipping.
Finished 1. Blade is overloaded and twists. TPI is too
workpieces are
fine. Blade is too narrow for cutting task.
rough or show
2. Blade TPI is too coarse or tooth style
scoring.
incorrect.
3. Blade is loose and fluttering.
4. Blade tracking is incorrect.
5. Blade has missing/bent teeth, or faulty weld.
Table is hard 1. Table tilt lock knobs are engaged.
to tilt.
2. Metal chips trapped between trunnion and
base.
-44-
Possible Solution
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Tighten mounting bolts; relocate/shim machine.
3. Inspect/replace V-belt (Page 46); realign pulleys if
necessary.
4. Re-align/replace shaft, pulley set screw, and key.
5. Tighten/replace.
6. Fix/replace fan cover; replace loose/damaged fan.
7. Replace blade (Page 38).
8. Replace.
9. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
Possible Solution
1. Reduce blade tension (Page 24).
2. Use correct blade for application (Page 32).
3. Reduce feed rate/pressure.
4. Use a wider arc on outside cuts, or use relief cuts to
make tight inside cuts.
5. Replace blade (Page 38).
6. Properly adjust blade tracking (Page 22).
7. Adjust blade guides/support bearings so teeth cannot
contact guides during operation (Page 25).
1. Adjust blade guides to eliminate any side pressure
(Page 25). Properly align table (Page 27).
2. Adjust guides (Page 25). Replace blade guides if
worn.
3. Check blade rotation. Reverse blade if necessary
(Page 38).
4. Feed workpiece straight into blade.
5. Adjust wheels to be coplanar (Page 48).
6. Adjust fence parallelism with blade (Page 28).
7. Replace blade (Page 38).
8. Tension V-belt; replace if worn or oily (Page 46).
1. Decrease feed rate; ensure proper TPI
(Page 32).
2. Use correct blade for material and speed of cut (Page
32).
3. Properly adjust blade tension (Page 24).
4. Adjust blade tracking (Page 22).
5. Replace blade (Page 38).
1. Disengage table tilt lock knobs (Page 39).
2. Remove table and clean trunnion sliding surfaces.
Model G0970 (Mfd. Since 07/23)