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11.0 Troubleshooting HVBS-712V/712DV Band Saw
11.1 Mechanical and electrical problems
Symptom
Motor will not start.
Motor will not start, or
motor stalls, resulting
in blown fuse or tripped
breaker.
Motor overheats.
Machine slows when
operating.
Loud, repetitive noise
coming from machine.
Excessive vibrations.
No coolant flow.
* WARNING: Some corrections may require a qualified electrician.
11.2 Operational problems
Symptom
Cuts not square.
Possible Cause
No incoming power.
Low voltage.
Open circuit in motor or loose
connection.
Too many tools running on one
circuit.
Short circuit in line cord or plug.
Short circuit in motor or loose
connections.
Incorrect fuses or circuit breakers in
power line.
Motor overloaded.
Air circulation through motor is
restricted.
Excessive feed pressure.
Belt loose.
Pulley setscrews are missing or
loose.
Motor fan is hitting the cover.
V-belt is defective.
Base on uneven surface.
Saw blade has cracks.
Too heavy a cut.
Coolant level low.
Filter screen clogged.
Pump motor faulty.
Possible Cause
Blade not square to vise/material.
Blade surface not perpendicular to
table.
Workpiece shifting in vise.
Low blade tension.
Blade guides out of adjustment.
Correction *
Check plug connection. If satisfactory,
check breaker or fuse.
Check power line for proper voltage.
Inspect all lead connections on motor for
loose or open connections.
Reduce number of tools connected to
circuit.
Inspect cord or plug for damaged insulation
and shorted wires.
Inspect all connections on motor for loose
or shorted terminals or worn insulation.
Install correct fuses or circuit breakers.
Reduce load on motor: increase speed or
decrease feed pressure.
Clean motor fan with compressed air to
restore normal air circulation.
Adjust spring tension to reduce feed
pressure, or increase speed using belt
adjustment.
Tighten belt.
Inspect setscrews. Replace or tighten if
necessary.
Tighten fan or shim cover.
Replace V-belt.
Move to level surface.
Replace blade immediately.
Reduce feed rate and blade speed.
Add coolant to tank.
Clean filter screen.
Replace pump.
Correction
Adjust vise square to blade.
Adjust blade guides until perpendicular.
Properly secure workpiece by tightening
vise handles. If irregular-shaped workpiece,
use appropriate clamping technique or jig.
Increase tension.
Adjust blade guides.
19
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