Hard Starting RAS

On 1/29/2018 1:15 AM, Puckdropper wrote:
> My DeWalt 7740 began to start hard today. It doesn't always do it, but
> there's a distinct effort (and a burning smell, as the motor is trying
> really hard to start) to start the motor rather than the usual quick and
> smooth starts. I'm not sure about this, but when pulling the saw through
> the wood the motion seemed more "grabby". I wonder if that's a sign of the
> blade slowing down?
>
> The blade spins freely and the bearings are new.
>
> If a start cap was going bad, would the motor behave in this manner? Any
> other likely suspects?

If not the starting capacitor, perhaps a dirty (or otherwise
malfunctioning) centrifugal switch. There is a switch that engages the
starting capacitor and then takes it "off line" when the motor is
running. Never had this problem with a RAS, but had something very
similar with a large office cross cut shredder. A good dose of
compressed air in the direction of that switch (mounted at the end of
the shaft) offered a temporary cure.

Puckdropper <[email protected]> wrote in news:[email protected]:

> My DeWalt 7740 began to start hard today. It doesn't always do it, but
> there's a distinct effort (and a burning smell, as the motor is trying
> really hard to start) to start the motor rather than the usual quick and
> smooth starts. I'm not sure about this, but when pulling the saw through
> the wood the motion seemed more "grabby". I wonder if that's a sign of the
> blade slowing down?
>
> The blade spins freely and the bearings are new.
>
> If a start cap was going bad, would the motor behave in this manner? Any
> other likely suspects?

Sounds like the start cap to me.