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18
10.0 Troubleshooting HBS-56MVS Band Saw
10.1 Operational problems
Symptom Possible Cause Correction
Cuts not square. Blade not square to vise/material. Adjust vise square to blade.
Blade surface not perpendicular to
table.
Adjust blade guides until perpendicular.
Workpiece shifting in vise. Properly secure workpiece.
Low blade tension. Increase tension.
Blade guides out of adjustment. Adjust blade guides. Bring guides as close
as possible to workpiece.
Premature dulling of
blade teeth.
Improper blade break-in. Follow proper break-in procedure.
Excessive blade speed – blade teeth
overheating.
Decrease speed.
Insufficient downfeed pressure. Increase downfeed pressure (adjust spring
tension).
Insufficient blade tension. Increase blade tension.
Improper tooth pitch for material. Use proper blade.
Hard spots on, or work hardening of,
material
Reduce blade speed and increase
downfeed rate.
Rough cut. Improper blade break-in. Follow proper break-in procedure.
Improper speed or feed pressure. Adjust as needed.
Dull or damaged teeth. Replace blade.
Poor weld on blade. Replace or re-weld blade.
Frequent blade
breakage.
Workpiece shifting in vise. Properly secure workpiece.
Improper blade selection; too few teeth
per inch or blade too thick.
Use blade with appropriate thickness and
tooth pitch for material.
Incorrect blade speed or downfeed
rate.
Use proper speed and feed rates.
Improper blade tension. Tighten blade to prevent slippage on
wheels.
Blade overstressed, pushing against
wheel flange.
Adjust blade tracking.
Poor blade construction; cracks at
weld.
Use properly welded blades.
Blade contacting workpiece before
saw is started.
Blade must be clear of workpiece when
turning on saw.
Guide bearing misalignment. Adjust blade guides according to
instructions.
Blade refuses to track
properly on wheels.
Improper blade tension. Tighten blade to prevent slippage on
wheels.
Guide bearing misalignment. Adjust blade guides according to
instructions.
Blade catching in workpiece. Use good quality blade of appropriate style
and tooth pitch for workpiece. Use cutting
fluid when needed.
Improper blade wheel alignment. Inspect and adjust wheel alignment.
Contact JET technical service if needed.
Wheel bearings/bushings worn. Inspect and replace if needed.
Table 3
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