On 8/8/2010 9:37 PM, Larry W wrote:
In ,
Mike wrote:
...snipped...
Nah - don't need sawstop for this need Leon. A simple brake is all that is
necessary. With all of the chop saws that come with brakes today, it really
should be no big deal for a table saw to have the same capability - it's
been around forever.

--

I agree with that: I've seen brake setups on industrial machinery powered
by 150 HP motors, geared down to about 30 RPM turning a roller that weighed
a few tons, that could stop the roller in less than a 1/4 turn.

At 30 RPM you have half a second to stop the blade in a quarter turn.
Sawstop stops the blade in .005 second.

I don't see
why any sacrificial parts are necessary for a saw to do what the sawstop
does. If Delta, Jet, etc. wanted to spend a little R&D money, they
could build a safer saw that was _better_ than sawstop.

So design a system, patent it, and open source the patent. It's amazing
how easy engineering is when somebody else has to do it.