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Troubleshooting – Mechanical and Electrical Problems
Trouble Probable Cause Remedy
Machine will not
start/restart or
repeatedly trips
circuit breaker or
blows fuses.
No incoming power.
Verify machine is connected to power
source, and that the safety key is
installed on the switch.
Cord damaged. Replace cord.
Overload automatic reset has not
been reset.
Re-set the overload by pushing in
completely the OFF (red) button on
the magnetic switch. Allow a few
minutes for the machine to cool. If
problem persists, check amp setting
on the motor starter.
Band Saw frequently trips.
One cause of overloading trips which
are not electrical in nature is too
heavy a cut. The solution is to reduce
feed pressure into the blade. If too
heavy a cut is not the problem, then
check the amp setting on the overload
relay. Match the full load amps on the
motor as noted on the motor plate. If
amp setting is correct then there is
probably a loose electrical lead.
Check amp setting on motor starter.
Building circuit breaker trips or fuse
blows.
Verify that band saw is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical
lead. Check amp setting on motor
starter.
Switch or motor failure (how to
distinguish).
If you have access to a voltmeter, you
can separate a starter failure from a
motor failure by first, verifying
incoming voltage at 220+/-20 and
second, checking the voltage
between starter and motor at 220+/-
20. If incoming voltage is incorrect,
you have a power supply problem. If
voltage between starter and motor is
incorrect, you have a starter problem.
If voltage between starter and motor
is correct, you have a motor problem.
Motor overheated.
Clean motor of dust or debris to allow
proper air circulation. Allow motor to
cool down before restarting.
Motor failure.
If electric motor is suspect, you have
two options: Have a qualified
electrician test the motor for function
or remove the motor and take it to a
qualified electric motor repair shop
and have it tested.