Hi, Ed. I expect it senses current, whether that's through a resistance
or a capacitance.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-03-15 04:19, Edward Price wrote:
*Pete:*
**
*Does the SawStop operate by sensing leakage current through the human
finger to ground, or does it sense the human body’s capacitance (like
those touch sensors that control small table lamps)?*
**
*Also, I read their literature, but I didn’t see any mention of
false-positive actions. Is there some white-paper that SawStop has
which might have some better technical details?*
**
*/Ed Price
/**WB6WSN**/
/**Chula Vista, CA USA*
**
*From:*Pete Perkins
[mailto:[email protected]]
*Sent:* Thursday, March 14, 2019 5:26 PM
*To:* [email protected]
*Subject:* Re: [PSES] classification of the output
Joe,
I am familiar with this product that stops the saw blade and protects
fingers. I talked with them during development; their primary problem
was that the product wasn’t explicitly covered under the standards for
the product they were intending this for. We discussed paths to
changing the standard (which takes years, too long) or convincing
major customers that the product was acceptable even without the 3^rd
party approval. It all seemed too long range so they proceeded on
their own and were eventually successful.
I’ve seen the demo video but don’t have it or know where it might
reside; the demo was amazing and convincing. Has there been a search
on You-tube yet?
Maybe Rich Nute knows where such might be hidden.
:>) br, Pete
Peter E Perkins, PE
Principal Product Safety & Regulatory Affairs Consultant
PO Box 23427
Tigard, ORe 97281-3427
503/452-1201
IEEE Life Fellow
[email protected] <mailto:[email protected]>
Entropy ain’t what it used to be
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