I have a Dewalt DW746 tablesaw and the other day
the motor quit. There was no burning smell or anything
of that nature. The motor is a single replacable unit
but I'd prefer to figure out what happened. This has a
single phase 1.75HP (allegedly) TEFC motor with a
start capacitor and a run capacitor. The motor shaft
spins freely by hand and I've blown sawdust out and
checked the switch. Nowhere in the Dewalt user documentation
or on their tech support website can I find any information
about diagnosing the problem, or rewiring the saw for
220V operation for that matter. In any case, if anybody
here can point me to a place where a woodworker with
a simple VOM and not much electrical knowledge can go
for more information, I'd certainly appreciate it. This
sort of slows me down a good bit on finishing projects.
Thanks in advance.
Joseph Crowe wrote:
> I have a Dewalt DW746 tablesaw and the other day
> the motor quit. There was no burning smell or anything
> of that nature.
First thing to check is the centrifugal switch mechanism.
Does the motor hum when you turn it on, but not rotate?
If so, remove blade, then turn motor on and spin the shaft by hand.
If motor runs, clean out and or replace centrifugal switch mechanism
which will require motor disassembly.
Care must be used to avoid brinelling the ball bearings when
disassembling and reassembling motor.
Upon further inspection of the wiring attached to the
switch, I found the culprit. I simply snipped the wire
leads, directly connected them via wire nuts, plugged
it into an external switched extension cord and fired it
up.....I'm glad for the simple things and apologize for
the interruption of your regularly scheduled discussion.
Now go out and get a switch with motor-rated contacts or be prepared to make
switches a regular part of your maintenance schedule.
You _are_ mounting your temporary fix where you can turn it off instantly,
I actually rewired the switch correctly with new connectors.
I will be looking, however, for a better switch than that which
came with the unit. The temporary fix was only to determine
the functionality, as I would not operate the saw in that manner.
Tablesaws are dangerous enough without jury rigged electrical
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