maimin SABRE 2000 - Page 13

Symptom
Possible
Cause
Actions
to Correct
Motor
does not
run,
Lamp
off
Motor
does
not
run,
Lamp
on
Motor
top
speed is
too
slow
or
too
fast
Motor
stalls when
cutting
Motor
runs at
set speed
but
does not
speed
up with
push
button
or on
position
"2"
for l20V
only
Motor
"Cogs"
(pulsing
or
irregular
rotation)
"Sparking"
at
rear
of motor.
Repeated
fuse
blowing
1. Blown
fuse
2. Defective
switch
3.
Wrong
voltage
l.
Worn
brushes
2. Loose
connection
3.
Defective
control
l.
Under voltage
or over voltage
2. Wrong
setting
of control
l. Worn
brushes
2. Loose
connections
3.
Overload
l. Defective pushbutton
443J
(for
220V
only)
2. Defective
switch
443H
(for
l20V
only)
l. Too
much IR
compensation
2.
Dust
from
carbon
brushes
l. Dust
from
carbon
brushes
l. Low
voltage
2. Loose
connections
3.
Worn
brushes
l.
Replace
fuse.
2. Replace
switch.
3.
Connect
only to voltage
shown
on
nameplate.
l.
Replace.
2. Remove
cover
with control
attached.
Check
all
7 connections
on
control.
3.
Using
a
DC
Volt meter;
volts
from-A
to
+A
should
be
90V
or
l8OVwhen
speed
control is
at
"
10";
Adjust
trim
pot
to desired
speed.
l.& 2.
Remove
cover
with
control from
box. Set knob
at
"100";
Adjust
MAX
trim
pot
at
desired
speed.
Set knob
at
"10";
Adjust
trim
pot
to
desired speed.
1.
Replace.
2.
Check all
connections
3.
Current
limit
has
been
set at
factory.
Limit
can be raised
by
adjusting
CL
clockwise.
l.
&2. Replace.
l. Adjust
IR
counter
clock-wise
30
at
a time
until
cogging
stops.
2. Remove
dust from
rear
housing
with
compressed
air.
l.
Remove
dust
from rear
housing
with compressed
air.
1.
Check
input-should
be at
least
l00V
or 218V
AC.
2.
Check
all
connections.
3. Replace
4.
Defective
electronic
components
4. Replace
control