"Frank Ketchum" wrote in message
nk.net...

"W.L.Hall Workshop" wrote in message
...


SawStop has provided us with a spare brake cartridge, so we will be "test
firing" a saw on Thursday, Jan 13th at 3:00pm. Your welcome to join us
if your in the area (Minneapolis).


Wish I could. Would it be possible to take a video of the test and post?

I have had doubts that the speed at which the saw stop system responds is
adequate for the level of protection that they claim. I assume you are
going to use a hot dog or some such to test this thing. Consider the
speed at which the "finger" is moving when it contacts the blade. I am
curious if the system will be adequate for a finger approaching the blade
at something like 2000 mm/sec (about 6.5 feet/sec) which is the hand speed
constant used to calculate safe distances in automation equipment with
electronic safe guarding.

I believe in the real world you hand is moving no where near 4.5 MPH during
any operation around a TS unless you are jerking you hand back.