Troubleshooting - Powermatic DS20 Operating Instructions And Parts Manual

Troubleshooting

Trouble Probable Cause
Machine will not Machine not connected to
start/restart or power source.
repeatedly trips
Fuse blown, or circuit
circuit breakers or
breaker tripped.
blows fuses.
Cord damaged.
Extension cord too light or
too long.
Building circuit breaker trips
or fuse blows.
Loose electrical connections.
Switch or motor failure (how
to distinguish).
Motor failure.
On/Off switch failure.
(or Forward/Reverse switch
on 3 phase model).
Disc won't come up Extension cord too light or
to speed. too long.
Low (incoming) voltage.
Excessive bite, or feed
pressure too great.
Excessive Too much pressure being
replacement of used during cuts.
sanding paper.
Not using full width of belt.
Machine vibrates Sander base not level with
excessively. floor.
Not secured to the floor.
Improper motor mounting.
Sanding marks on Sanding paper too coarse for
workpiece. required finish.
Workpiece sanded across
grain.
Sanding grains Sanding paper has lost its
quickly rub off original properties.
paper.
Remedy
Verify machine is connected to power.
Replace fuse, or reset circuit breaker.
Replace cord.
Use adequate size extension cord.
Verify that sander is on a circuit of correct size. If
circuit size is correct, there is probably a loose
electrical lead.
Go through all the electrical connections on the edge
sander including motor connections, verifying the
tightness of each. Look for any signs of electrical
arcing which is a sure indicator of loose connection or
circuit overload.
If you have access to a voltmeter, you can separate a
switch failure from a motor failure by first, verifying
incoming voltage at 220+/-10% and second, checking
the voltage between switch and motor at 220+/-10%.
If incoming voltage is incorrect, you have a power
supply problem. If voltage between switch and motor
is incorrect, you have a switch problem. If voltage
between switch and motor is correct, you have a
motor problem.
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.
If the switch is suspect, you have two options: Have a
qualified electrician test the switch for function, or
purchase a new switch and establish if that was the
problem on changeout.
Use adequate size extension cord.
Contact qualified electrician.
Allow sanding disc to cut freely, do not force.
Reduce pressure.
Stroke across the belt using full width.
Shim if necessary.
Use lag screws through holes in base to secure
machine to the floor.
Check and adjust mounting.
Use proper grit. Coarser grits for stock removal, and
finer grits for finish work.
When surface sanding, use fine sanding disc paper
then finish by hand, working in direction of grain.
Do not store sanding paper in extremely dry or high-
temperature areas. Do not fold sanding disc papers,
store them flat.
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