Jet HVS-8-DMW, Operating Instructions And Parts Manual

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18
10.0 Troubleshooting HVBS-DM series Band Saws
Symptom Possible Cause Correction*
Excessive blade
breakage Material loose in vise. Clamp work securely.
Incorrect speed or feed. Check machinery handbook for speed/ feed
appropriate for material being cut.
Teeth too coarse for material. Check machinery handbook for
recommended blade type.
Incorrect blade tension. Adjust blade tension to the point where the
blade just does not slip on the wheel.
Saw blade in contact with workpiece
before saw is started. Start motor before placing blade on
workpiece.
Blade rubs on wheel shoulder. Adjust blade tracking.
Misaligned guides. Adjust guides.
Cracking at weld. Longer annealing cycle.
Premature blade dulling Blade teeth too coarse. Use a finer tooth blade.
Blade speed too high. Try a lower blade speed.
Inadequate feed pressure. Decrease spring tension.
Hard spots in workpiece or scale on/in
workpiece. Increase feed pressure (hard spots). Reduce
speed, increase feed pressure (scale).
Work hardening of material (especially
stainless steel). Increase feed pressure by reducing spring
tension.
Insufficient blade tension. Increase tension to proper level.
Operating saw without pressure on
workpiece. Do not run blade at idle in/on material.
Bad cuts (out-of-square) Workpiece not square with blade. Adjust vise so it is square with the blade.
(Always clamp work tightly in vise.)
Feed pressure too fast. Decrease pressure.
Guide bearings not adjusted properly. Adjust guide bearing clearance to 0.001 inch
(0.002 inch maximum).
Inadequate blade tension. Gradually increase blade tension.
Span between the two blade guides
too wide. Move blade guide bar closer to work.
Dull blade. Replace blade.
Incorrect blade speed. Check blade speed/pulley position.
Blade guide assembly is loose. Tighten blade guide assembly.
Blade guide bearing assembly loose. Tighten blade guide bearing assembly.
Blade track too far away from wheel
shoulders. Adjust blade tracking.
Guide bearing worn. Replace worn bearing.
Bad cuts (rough)
Blade speed too high for feed
pressure. Reduce blade speed and feed pressure.
Blade too coarse. Replace with finer blade.
Blade is twisting Blade is binding in the cut. Decrease feed pressure.
Blade tension too high. Decrease tension on blade.
Unusual wear on side or
back of blade Blade guides worn Replace blade guides.
Blade guide bearings not adjusted. Adjust blade guide bearings.
Blade guide bearing bracket is loose. Tighten blade guide bearing bracket.