20

Troubleshooting

Fault

Probable cause

Suggested remedy

 

 

 

 

 

Excessive blade

1.

Material loose in vise.

1.

Clamp work securely.

breakage

2.

Incorrect speed or feed.

2.

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 is in contact with

5.

Start the motor before placing the

 

 

workpiece before the saw is

 

saw on the workpiece.

 

 

started.

 

 

 

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

1.

Blade teeth too coarse.

1.

Use a finer tooth blade.

dulling

2.

Blade speed too high.

2.

Try a lower blade speed.

 

3.

Inadequate feed pressure.

3.

Decrease spring tension.

 

4.

Hard spots in workpiece or scale

4.

Increase feed pressure (hard

 

 

on/in workpiece.

 

spots). Reduce speed, increase

 

 

 

 

feed pressure (scale).

 

5.

Work hardening of material

5.

Increase feed pressure by

 

 

(especially stainless steel).

 

reducing spring tension.

 

6.

Insufficient blade tension.

6.

Increase tension to proper level.

 

7.

Operating saw without pressure

7.

Do not run blade at idle in/on

 

 

on workpiece.

 

material.

 

 

 

 

 

Bad cuts

1.

Workpiece not square with blade.

1.

Adjust vise so it is square with the

(out-of-square)

 

 

 

blade. (Always clamp work tightly

 

 

 

 

in vise.)

 

2.

Feed pressure too fast.

2.

Decrease pressure.

 

3.

Guide bearings not adjusted

3.

Adjust guide bearing clearance to

 

 

properly.

 

0.001 inch (0.002 inch maximum).

 

4.

Inadequate blade tension.

4.

Gradually increase blade tension.

 

5.

Span between the two blade

5.

Move blade guide bar closer to

 

 

guides too wide.

 

work.

 

6.

Dull blade.

6.

Replace blade.

 

7.

Incorrect blade speed.

7.

Check blade speed

 

 

 

 

(see Figure 3).

 

8.

Blade guide assembly is loose.

8.

Tighten blade guide assembly.

 

9.

Blade guide bearing assembly

9.

Tighten blade guide bearing

 

 

loose.

 

assembly.

 

10.

Blade track too far away from

10.

Adjust blade tracking.

 

 

wheel flanges.

11.

Replace worn bearing.

 

11.

Guide bearing worn.

 

 

 

 

 

Bad cuts (rough)

1.

Blade speed too high for feed

1.

Reduce blade speed and feed

 

 

pressure.

 

pressure.

 

2.

Blade is too coarse.

2.

Replace with finer blade.

 

 

 

 

 

Page 20
Image 20
Jet Tools J-7060 operating instructions Troubleshooting, Fault Probable cause Suggested remedy

J-7060 specifications

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