JET Tools J-8201K User Manual - Page 21

Troubleshooting, Fault, Probable cause, Suggested remedy

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Troubleshooting the J-8201/8203/8201VS/8203VS Fault Excessive blade breakage Premature blade dulling Bad cuts (out-ofsquare) Bad cuts (rough) Probable cause Suggested remedy 1. Material loose in vise. 1. Clamp work securely. 2. Incorrect speed or feed. 2. Refer to Figure 7 or check Machinist's Handbook for speed/feed appropriate for the material being cut. 3. Teeth too coarse for material. 3. Check Machinist's Handbook for recommended blade type. 4. Incorrect blade tension. 4. Adjust blade tension to the point where the blade just does not slip on the wheel. 5. Saw blade contacts workpiece before 5. Start the motor before placing the saw the saw is started. on the workpiece. 6. Blade rubs on the wheel flange. 6. Adjust blade tracking. 7. Misaligned guides. 7. Adjust guides. 8. Cracking at weld. 8. Longer annealing cycle. 1. Blade teeth too coarse. 1. Use a finer tooth blade. 2. Blade speed too high. 2. Try a lower blade speed. 3. Hard spots in workpiece or scale on/in 3. Increase feed pressure (hard spots). workpiece. Reduce speed, increase feed pressure (scale). 4. Work hardening of material (especially 4. Increase feed pressure by reducing stainless steel). spring tension. 5. Insufficient blade tension. 5. Increase tension to proper level. 6. Operating saw without pressure on workpiece. 6. Do not run blade at idle in/on material. 1. Feed pressure too fast. 1. Decrease pressure. 2. Guide bearings not adjusted properly. 2. Adjust guide bearing clearance to 0.001 inch (0.002 inch maximum). 3. Inadequate blade tension. 3. Gradually increase blade tension. 4. Dull blade. 4. Replace blade. 5. Incorrect blade speed. 5. Check blade speed (see Figure 7). 6. Blade guide assembly is loose. 6. Tighten blade guide assembly. 7. Blade guide bearing assembly loose. 7. Tighten blade guide bearing assembly. 8. Blade track too far away from wheel flanges. 8. Adjust blade tracking. 9. Guide bearing worn. 9. Replace worn bearing. 1. Blade speed too high for feed pressure. 1. Reduce blade speed and feed pressure. 2. Blade is too coarse. 2. Replace with finer blade. 21

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21
Troubleshooting the J-8201/8203/8201VS/8203VS
Fault
Probable cause
Suggested remedy
Excessive blade
breakage
1. Material loose in vise.
1. Clamp work securely.
2. Incorrect speed or feed.
2. Refer to Figure 7 or check Machinist’s
Handbook for speed/feed appropriate for
the material being cut.
3. Teeth too coarse for material.
3. Check Machinist’s Handbook for
recommended blade type.
4. Incorrect blade tension.
4. Adjust blade tension to the point where
the blade just does not slip on the wheel.
5. Saw blade contacts workpiece before
the saw is started.
5. Start the motor before placing the saw
on the workpiece.
6. Blade rubs on the wheel flange.
6. Adjust blade tracking.
7. Misaligned guides.
7. Adjust guides.
8. Cracking at weld.
8. Longer annealing cycle.
Premature blade
dulling
1. Blade teeth too coarse.
1. Use a finer tooth blade.
2. Blade speed too high.
2. Try a lower blade speed.
3. Hard spots in workpiece or scale on/in
workpiece.
3. Increase feed pressure (hard spots).
Reduce speed, increase feed pressure
(scale).
4. Work hardening of material (especially
stainless steel).
4. Increase feed pressure by reducing
spring tension.
5. Insufficient blade tension.
5. Increase tension to proper level.
6. Operating saw without pressure on
workpiece.
6. Do not run blade at idle in/on material.
Bad cuts (out-of-
square)
1. Feed pressure too fast.
1. Decrease pressure.
2. Guide bearings not adjusted properly.
2. Adjust guide bearing clearance to
0.001 inch (0.002 inch maximum).
3. Inadequate blade tension.
3. Gradually increase blade tension.
4. Dull blade.
4. Replace blade.
5. Incorrect blade speed.
5. Check blade speed (see Figure 7).
6. Blade guide assembly is loose.
6. Tighten blade guide assembly.
7. Blade guide bearing assembly loose.
7. Tighten blade guide bearing assembly.
8. Blade track too far away from wheel
flanges.
8. Adjust blade tracking.
9. Guide bearing worn.
9. Replace worn bearing.
Bad cuts (rough)
1. Blade speed too high for feed
pressure.
1. Reduce blade speed and feed
pressure.
2. Blade is too coarse.
2. Replace with finer blade.