23
EVTBS16V
13.2 Mechanical and Electrical Problems
Table 3 (cont.)
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.
Make sure START button is pushed in com-
pletely, and STOP button is disengaged.
Cord damaged.
Replace cord.
Overload automatic reset has not reset.
When the band saw overloads on the circuit
breaker built into the motor starter, it may take
time for the machine to cool down before re-
start. Allow unit to adequately cool before at-
tempting restart. 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 solu-
tion 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.
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.
Switch or motor failure (how to distin-
guish).
If you have access to a voltmeter, you can sepa-
rate a starter failure from a motor failure by first,
verifying incoming voltage at 220+/-10% and
second, checking the voltage between starter
and motor at 220+/-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 op-
tions: 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.
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