Advertisement
MOTOR
TROUBLE
- SHOOTING
CHART
NOTE:
Motors
used on wood-working
tools
are particularly
susceptible
to the accumulation
of sawdust
and wood
chips
and
should
be blown
out
or
"vacuumed"
frequently
to
prevent
interference
with
normal
motor
ventilation.
TROUBLE
PROBABLE
CAUSE
SUGGESTED
REMEDY
Motor
will not run.
1. Protector
open,
c!rcuit
1. Reset protector
by pushing
on red button,
broken,
located
on top of motor
(indicated
by
audible
click).
2. Check
power
line for proper
voltage.
Motor
will not run and
Inspect
line, cord
and plug for damaged
fuses "BLOW".
insulation
and shorted
wires.
Motor
fails to develop
full power.
(Power
output
of motor
decreases rapidly
with decrease
in voltage at
motor
terminals.
For
example:
a reduction
of
10% in voltage
causes a
reduction
of 19% in
maximum
power
output
of which the motor
is
capable, while
a reduction
of 20% in voltage causes
a reduction
of 36% in
m ax imum
power
ou tpu t.)
Motor
overheats.
Motor
starts slowly or
fails to come up to full
speed.
Motor
stalls (resulting
in
blown
fuses or tripped
circuit
breakers).
Frequent
opening of
fuses or circuit
breakers.
2. Low voltage.
1. Short
circuit
in line,
cord or p{ug,
2. Short
circuit
in motor
or
loose connections.
3. Incorrect
fuses in power
line.
2.
3.
Power
line overloaded
with
lights, appliances and other
moto rs.
Undersize
wires or circuit
too long.
General
overloading
of
power
company's
facilities.
(In many
sections
of the
country,
demand
for
electrical
power
exceeds
the capacity
of existing
generating
and distribution
systems.)
1. Excessive
feed rate when
crosscutting
or ripping.
2. Improper
cooling.
(Air
circulation
restricted
through
motor
due to
sawdust,
etc.)
3. Saw blade has "heel".
1. Low Voltage
- will not trip
starting
switch.
1. Voltage
too low to permit
motor
to reach operating
speed.
2. Fuses or circuit
breakers
do not have sufficient
capacity.
1. Motor
overloaded.
2. Fuses or circuit
breakers
do not have sufficient
capacity.
1.
2.
3
Inspect
all terminals
in motor
for loose or
shorted
terminals
or worn
insulation
on wires.
Install
correct
fuses.
1. Reduce
the line load.
2. Increase
wire sizes, or reduce
length
of wiring.
3. Request
a voltage
check
from
the power
company.
1. Slow down
rate of feed.
2. Clean out sawdust
to provide
normal
air
circulation
through
motor.
3. Refer to Alignment
Procedure
Section
of
manual
Step F ire.
1. Correct
low voltage
condition.
1. Correct
the low line voltage
condition.
2. Re£1ace fuses or circuit
breakers
with
proper
capacity
units.
1. Reduce
motor
load.
2. Replace
fuses or circuit
breakers.
33
Advertisement
