" wrote:

On Dec 6, 11:41 am, "Michael A. Terrell"
wrote:
" 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.

Excuse me, but try to follow the thread. The discussion was
about the SawStop and what happens if power is lost. The
claim was made that it still would work. Then someone claimed
that you could just short the motor and use electromagnetic
braking in case of power loss. The SawStop halts the saw in
1 ms.


Excuse yourself. It doesn't do that when the power fails, and you're
in the dark with a stil spinning blade. It's you that can't comprehend
what is happening in this thread. I introduced the magnetic braking to
stop the blade faster when the motor is turned off. I also told how to
do it in the case of a power failure. It's not my fault that your mother
used to let you play with plastic bags over your head, which caused all
that brain damage.