On Dec 5, 12:24*pm, dpb wrote:
On 12/5/2012 7:24 AM, wrote: On Dec 5, 12:38 am, Leonlcb11211@swbelldotnet *wrote:

...

If the saw was running, it will stop if there is a loss of power. *Yes
the stop will work if the saw is turned off.

...

You know this for a fact? *It's in the product description?

Well, Leon's second sentence is somewhat ambiguous altho if intended
specifically what is written only then I think he's right. *Turning the
saw off isn't the same thing as loss of power. *Having the two in
juxtaposition as does leads one to easily conclude that is saying that
the actuator would still function in the latter case. *I don't know if
that was intended meaning or not.

I think it is correct that it would likely function if one hit the blade
during coastdown after turning the saw off w/ the normal switch (not
removing power from the saw) altho I can't find that specifically
addressed on the SS site.

I do _not_ think from the description it is at all likely that they have
designed it so that it would actuate during coastdown after the external
removal of power. *I base this on the following description of
operation-- In order to stop the saw, a fast-acting brake stops the
blade when

contact is detected. The brake includes a heavy-duty spring to push a
block of aluminum, called a brake pawl, into the teeth of the blade
to stop the blade from spinning. The spring is held in compression by
a fuse wire until contact is detected. When contact is detected, the
system sends a surge of electricity through the fuse wire to burn the
wire and release the spring.

I seriously doubt there is a backup supply for that power to the fusible
link after a power outage nor is there any indication of a backup power
supply to keep the microprocessor circuitry functioning after loss of
power to the machine.

--

I agree. Having the protection system work during coast-down
after the power switch is turned off seems like an excellent
feature and it costs virtually nothing to implement. Having it
work when there is a power failure is a whole different story
and would require somehow having a power store that would
last a minute or so. That would add cost and complexity and
for what? Normal coast-down occurs every time the saw
is turned off. Power failures with the saw operating are going
to be rare. About the only added factor which I'm sure
someone will bring up is that when the power fail occurs
you might be in the dark with a saw that's still spinning.
However I think the cases where there would be so little
light that you couldn't see well enough to avoid the saw
are going to be few.