On Wed, 13 Oct 2010 18:16:40 -0400, "J. Clarke"
wrote:

Use a DC motor and a DPDT switch with a big resistor across the "stop"
terminals to short the motor when you shut it off. Stop a 10 inch
blade from 3600rpm in less trha a second with a dead short (if the
switch can handle it) or in about 2 seconds with a good "soft" braking
resistor.

Which is where this thread started.


A really big solid state relay and a sealed explosion proof switch,
cause you do not want to start a thread about sawdust explosions.
Right?

You know you can use oars to stir stuff.

Mark