You've also got to get a new blade, too. I'm curious if the SawStop
technology would be effective enough if it would fire and just drop the
blade totally in to the saw rather than jamming it in to a piece of
metal. I realize there's no possibility of a second stage, where if
contact is still being made it could then stop the blade.
I'd rather have my fingers.
"Puckdropper" <puckdropper(at)yahoo(dot)com> wrote in message
Think about that for a sec, if the blade simply fell below the surface and
continued to spin,,,, do you think a blade that is spinning against a finger
and moving down 1-3 inches would cut you? I think it would be imperative
that the blade stop spinning and perhaps not drop below the surface as an
No, I don't.
Remember that the lower the blade is, the farther the cutting edge is from the
front of the saw -- hence as the blade drops, it also moves away from your
fingers horizontally as well as vertically.
I don't think I agree. Watch -- carefully -- the slow-motion video at
sawstop.com, the one titled "How it Works". Pause it at 0:20 and step forward
a frame at a time, watching as the blade contacts a finger. It appears that
only one or two teeth actually touch it before the blade begins to drop.
Note also the manufacturer's statement that the blade stops in 5 msec.
A 40-tooth blade at 3450 rpm is moving 38.33 teeth per second, or 26 msec per
On Fri, 08 Jan 2010 16:26:33 GMT, firstname.lastname@example.org (Doug Miller)
IIRC, the original sawstop concept just jammed the blade; the
mechanism to drop it down was added a little later. I suspect these
are redundant mechanisms, each can do the job on its own, but both
together achieve the sort of reliability you would need in something
that's guaranteed to generate a lawsuit if it doesn't work.
It's the good old 'catastrophe in exchange for a catastrophe' method.
Like an air bag or an ejection seat. The fun part of the SawStop is
that it stores and releases its own energy. It is very, very clever. I
had a great time chatting with the rep at the Toronto Woodworking
Machinery show a cpl of months back. It's a beautiful saw, really well
made. I'd be proud and happy to own a piece of gear like that.
Still have not looked at the video mentioned but IIRC the belts loosen
substantially also. IMHO part of the trick to getting the blade to stop
quickly is to disconect it from the momenum of the large motor that would
also have to be stopped if the belts did not loosen.
Seems to me that SawStop provides the best of both worlds: it stops the blade,
and uses the energy of the rotating blade to drop the trunnion so the blade
moves out of the way too.
My next TS will definitely be a SawStop. Just have to figure out how to afford
I just mentioned this in another post here, IIRC in a video I saw some years
back, when the blade drops it is no longer tensioned against the belts. I
was always under the impression that the blade dropping was to also to
facilitate the direct disconnect from the motor so that it could be stopped
more quickly and with less thunder. The blade might just cut through the
cartridge completely if it had to stop the motor that quickly also. ;~)
If my saw wears out the SawStop will be my next also.
Sure, me too. But I will wait for my Powermatic 66 (my very first
table saw) to crap out first. No table saw accidents yet, except for
a deep cut in my hand on the miter slot edge--ouch! And that accident
happened with it unplugged. Since then, I used some 320 grit on that
sharp iron table-top edge. Nothing is better than working with safety
in an undistracted head--you never know what might happen.
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