Jet HVBS-56V, Operating Instructions Manual

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10.0 Troubleshooting HVBS-56V Band Saw
10.1 Mechanical and electrical problems
Symptom Possible Cause Correction *
Motor will not start. Low voltage. Check power line for proper voltage.
Open circuit in motor or loose
connection. Inspect all lead connections on motor for
loose or open connections.
Overload condition. Allow machine to cool down, then restart.
Motor will not start, or
motor stalls, resulting
in blown fuse or tripped
breaker. Too many tools running on one
circuit. Reduce number of tools connected to
circuit.
Motor brushes worn. Inspect and replace brushes if needed.
Short circuit in line cord or plug. Inspect cord or plug for damaged insulation
and shorted wires.
Short circuit in motor or loose
connections. Inspect all connections on motor for loose
or shorted terminals or worn insulation.
Incorrect fuses or circuit breakers in
power line. Install correct fuses or circuit breakers.
Motor overheats. Motor overloaded. Reduce load on motor: increase speed or
decrease feed pressure. Make sure blade
is appropriate for material.
Air circulation through motor is
restricted. Clean motor fan with vacuum to restore
normal air circulation.
Gears misaligned. Contact JET technical service.
Machine slows when
operating. Excessive feed pressure. Adjust spring tension to reduce feed
pressure, or increase speed.
Motor brushes worn. Inspect and replace brushes if needed.
Table 3
* WARNING: Some corrections may require a qualified electrician.
10.2 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.
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 feed rate (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.