Use and Care Manual

29
12.2 Mechanical and electrical problems
Table 5
Symptom Probable Cause Correction *
Machine will not
start/restart or
repeatedly trips circuit
breaker or blows
fuses.
No incoming power. Verify machine connections.
Cord damaged. Replace cord.
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 this does not resolve the
issue, check for loose electrical lead.
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.
Overload automatic reset has not reset.
When the 3HP and 5HP Band Saw
overloads on the circuit break built into
the motor starter, it takes time for the
machine to cool down before restart.
Allow machine to adequately cool before
attempting restart. If problem persists,
check amp setting on the motor starter
inside the electrical box.
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 115 +/-10% (or 230+/-10%)
and second, checking the voltage
between starter and motor at 115 +/-10%
(or 230+/-10%). 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 for testing.
Miswiring of unit.
Double check to confirm all electrical
connections are correct. Refer to wiring
diagram to make needed corrections.
Switch failure.
If the start/stop switch is suspect, you
have two options: Have a qualified
electrician test the switch for function, or
purchase a new start/stop switch and
establish if that was the problem on
change-out.
Band Saw does not
attain full speed.
Extension cord too light or too long.
Replace with adequate size and length
cord.
Low current. Contact a qualified electrician.
* WARNING: Some corrections may require a qualified electrician.