" wrote:

On Dec 5, 2:50 pm, "Michael A. Terrell"
wrote:
" wrote:

You do realize that turning off the saw via the switch is
very different from a power failure, right? Using the
switch there is still power available to the protection
circuitry. During a power failure there is not.

A relay with it's coil across the power line when the switch is on
will stop it, if the power fails. Or configure it with the common
on/off power buttons as a simple motor controller.

It will stop it in 1 ms? Or at least close enough to instantly
to avoid injury, eh? You sure about that? You should go tell
the SawStop guy what a simple, practical new invention you
have. I say, it just doesn't work.


No one claimed that it did, and you just want to whine.

It is useful to stop the blade faster when the power is turned off,
or with a few more parts, when the power fails. A lot of people have no
business around power tools, hot coffee or computers.