Whrilwind table saw technology/Stops SAW STOP

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Blog entry by Bob Kollman posted 02-21-2011 08:35 AM 7073 reads 1 time favorited 25 comments Add to Favorites Watch

The link below takes you to a man who has invented a saw stop like add on that works on

The Rigid TS 3650 – Delta- And other saws. The great thing is that it stops the blade without

wrecking it. Still in the devlopment stage- but I think this will be what table saws look like in

the future.

-- Bob Kenosha Wi.

25 comments so far

View nobuckle's profile


1120 posts in 2966 days

#1 posted 02-21-2011 03:10 PM

Interesting idea. I think Saw Stop works by sensing the amount of moisture. This device appears as though it may work either by a proximity detection system or a system that is able to sense the bodies natural electrical current. It doesn’t really matter how it works as long as it works. I wonder if the horse power of the motor is why the device is only being made for job site saws. At any rate, it’s still a pretty cool idea. Thanks for the post.

-- Doug - Make an effort to live by the slogan "We try harder"

View Woodbutchery's profile


414 posts in 3791 days

#2 posted 02-21-2011 03:34 PM

One of the things remarked several times by the fellow doing the demonstration was how this was designed for the construction saw. It answers the question that’s been raised by many on what was to be done for all the construction table saws out in the field.

The question (of course) becomes how much and how hard is it to implement.

Great gadget though – stop the saw BEFORE coming in contact with the blade AND not destroy the blade.

-- Making scrap with zen-like precision - Woodbutchery

View SST's profile


790 posts in 4400 days

#3 posted 02-21-2011 05:43 PM

Anything that makes power tools safer has my vote, as long as the government stays out of requiring it. And while I’m guilty of putting one saw kerf “smile” in the end of my thumb, (thankfully not too deep) I still believe that we, not the safety devises, provide the best measure of safety in the shop.
My rule of thumb…(no pun intended, okay, maybe intended) is “You never lose fingers if you never lose focus” -SST

-- Accuracy is not in your power tool, it's in you

View Jeremy Greiner's profile

Jeremy Greiner

568 posts in 2977 days

#4 posted 02-21-2011 06:23 PM

They both work on electrical current discharge. The saw stop is running an electrical current through the blade, when the electricity discharges from contact with a material (any) it detects the rate at which it leaves the blade. If this rate gets to a certian rate (the rate at which the electricity flows from metal to skin) the brake is triggered.

Wet wood used to trigger the saw stop because the moister in the wood increased it’s conductiveness higher than what the saw thought should be for wood and so the break would trigger. Now days I believe the detection is better, but I don’t know.

The 2 key differences is the electrical detection on this system is on the blade guard and since it ahead of the blade it can slow the blade down with out damage which takes as long as 1/8th of a second. The downside is that there are several table saw operations that are impossible with the blade guard in place (any sort of dado opperations).

Ideally both technologies on the same saw would be awesome. I would certianly love to see more development in flesh detection technologies.


-- Easy to use end grain cutting board designer:

View Beginningwoodworker's profile


13345 posts in 3878 days

#5 posted 02-21-2011 07:06 PM

Hum that might be a better than the sawstop.

View Joe Lyddon's profile

Joe Lyddon

10328 posts in 4257 days

#6 posted 02-21-2011 09:50 PM

Well, that’s a new twist!

I tried their website, and it hung my computer up…
Has anyone else been able to look at it?

I wanted to see how the cost was… I have no idea…

I wonder if it could be disabled… I don’t think on could cut Keyed Splines in the corners of a box… or cut the tapers required for a door panel…

It appears that sensing capacitance changes and/or light disturbances are the basis for triggering the device.

It’s interesting to see how other solutions are being developed…

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: ... My Small Gallery:"

View Jeremy Greiner's profile

Jeremy Greiner

568 posts in 2977 days

#7 posted 02-21-2011 10:39 PM

This is a prototype setup on several saws they have patented the technology and are now attempting to get saw manufacturers to license the technology.

They do not produce any kits or hardware for sale at this time.

-- Easy to use end grain cutting board designer:

View CovenantCreations's profile


127 posts in 3108 days

#8 posted 02-22-2011 02:47 AM

How does it stop the blade with out damaging it? Is it like a brake pad of a car o something? I can really see this going over well if it was made and marketed right.

View Dave's profile


11429 posts in 3045 days

#9 posted 02-22-2011 05:06 AM

He has a great idea. JOE his site worked fine for me. What bothered me is look at what he is cutting a 2/4. What if your finger is directly behind the blade. Will you get cut because the guard is 1 and 1/2 inches off the table.
I still like the sawstop because the sensing is the blade not the guard. What I don’t like is saw stop lobbing the government telling me I have to have one. I am a hybrid woodworker. My money goes into hand-tools. The device probably costs as much as the saw. I would rather spend the money that these devices would cost on an old rip saw. Safety is in your mind not the device. imho

-- Superdav "No matter where you go - there you are."

View bigike's profile


4055 posts in 3493 days

#10 posted 02-22-2011 05:10 AM

I still hope it’s cheaper than a saw it self and I mean a contractors saw.

-- Ike, Big Daddies Woodshop,

View Bob Kollman's profile

Bob Kollman

1798 posts in 3396 days

#11 posted 02-22-2011 08:11 AM

Well in one form or another I think the goverment will move into regulating the safty of table saws.
that is why I believe this typee of saw stop is our future. It looks cheaper to develope, and the
whirlwind guy has already adapted this to a wide range of saws, which means the big boys will
only have to make refinments. It is just good to see that choices are being developed.

-- Bob Kenosha Wi.

View Bob Kollman's profile

Bob Kollman

1798 posts in 3396 days

#12 posted 02-22-2011 08:17 AM

I have added the video for you joe!!!!

-- Bob Kenosha Wi.

View Bob Kollman's profile

Bob Kollman

1798 posts in 3396 days

#13 posted 02-22-2011 08:25 AM

-- Bob Kenosha Wi.

View ProbablyLost's profile


83 posts in 3723 days

#14 posted 02-22-2011 09:40 AM

I know it is not right, but I hate using the saw guard. Why cant someone come up with the electrical detection of the “Saw Stop” that can be used on any saw, won’t wreck the blade and doesn’t require the use af a guard? That is the million dollar invention!

-- Chris

View 747DRVR's profile


199 posts in 3562 days

#15 posted 02-22-2011 04:16 PM

I would love to see real compitition for the sawstop but this is not it.If I was willing to put a huge guard on my saw that completely obscures the blade I would need any electronics.Also the blade stops in 1/8 of a second.At 3000 rpm thats 6 full revolutions.

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