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On Tue, 19 Aug 2014 19:50:41 -0400, "Mike Marlow"
wrote:

wrote:
Hi all ;

Can anyone provide a somewhat scientific .. yet
simple explanation - of how the saw-stop
_detection_ works ?
I saw a demonstration - and cannot figure out why :
: it works on a finger
: it works on a hot dog - being held by a finger
.. but not on a hot dog that is not held by a finger !

I'm really missing something - and it's driving me crazy !

John T.


Not sure what you mean by not on a hot dog that is not held by a finger.
Have you really looked into this at all? Have you asked any questions of
the manufacturer?


It was explained in the seminar but not demonstrated that
if you fed a hotdog into the blade - but not holding it in your hand -
- ie just having the hotdog held between 2 pieces of wood -
the sawstop would not function to stop the blade ...
it would cut the hotdog !
That's what I couldn't understand.
That's what I need to have explained.

A capacitor "absorbs" and stores electricity up to its capacity, then
releases any addition electricity sent its way. A hotdog, although having
similar capacitance characteristics, is only a small mass, and capacitance
of human flesh (and hotdogs) functions as a relationship of mass to
capacitance content, or think of it as volume. If a human is holding the
hotdog, then the hotdog and the human essentially become one and there is
enough mass and capacitance "volume" that the saw can sense the change and
trigger the Sawstop. The hotdog held by sticks just does not have enough
mass and capacitance "volume" for the Sawstop to recognize the change.

Does that get you to the answer?
--
Jim in NC


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