New Safety Feature Detects Flesh 124
nmb3000 writes "SawStop has introduced a new safety feature for dangerous power tools such as table and band saws which, if accurate and reliable, could result in a lot fewer people visiting the emergency room due to deadly accidents. Using the difference in electrical capacitance between various substances, the system can stop a blade rotating at 4000 RPM in less than 5 milliseconds after detecting contact with flesh. It's hard to understand just how effective this is until you see the demonstration videos where a hotdog is used in place of a potential victim's finger. The site also gives a brief explanation of how the system works as well as some high-speed videos showing just how quickly the blade stops rotating. I wonder if this same technology might be used to protect you neighbor's cat from your robotic lawnmower?"
They can't do this to me (Score:5, Funny)
I don't see how this is going to work for me. I use my power tools to prepare my BBQ. I use the saw to split the hot dogs and shape the hamburger patties.
It is "features" like this that kill the hobbist market for power tools.
Re:They can't do this to me (Score:2)
Guffaw. Chortle.
Seriously... (Score:5, Insightful)
Also, gotta wonder if this sort of thing might actually *increase* the number of injuries from power cutting equipment -- by reducing the level of respect for the destruction power of the equipment. Sorta like some of the safety features of automobiles has led to some folks driving more agressively...
Re:Seriously... (Score:2)
What I'm worried about is getting used to my flesh-safe saw, and then grabbing my roommates dad's old Wahl chainsaw or something, and getting careless...
Yeah, I can see disrespect start to creep in. Nothing breeds contempt like familiarity though... (I do some pretty dangerous pocket cuts in 4'x8' plywood sometimes...)
Re:Seriously... (Score:1)
Re:High tech meets low tech (Score:2)
You don't sharpen an axe blade like you do a knife blade. That fine a point would be blunted in one or two chops. A duller blade to begin with, may not slice through trees like a ninja's sword ( as in Spies like Us ) but it will chop more trees between resharpenings, and not get stuck i
emergency room? (Score:1)
If it is too deadly, they will be in the morgue
Forget trying to use it as a safety device, why not attack when you detect flesh, thus stopping your neighbours dog shitting on your lawn!
Go RoboMower! Mow his ass!
Chain Saw Killers Unite! (Score:5, Funny)
Bond (Score:5, Funny)
CHUG.
"...eh? Damn you SawStop"
T.
Re:Bond (Score:3, Informative)
Re:Bond (Score:2, Funny)
The villain _meant_ "You will lose your penis!"
But, no losing happened. Instead, the only outcome was loosing, because Bond's penis was still hanging out in the open, unharmed and ready for action.
Wait, OK. Maybe let's not go there.
Yeah, after some re-thinking, I think I'll stick with the spelling Nazi. =)
Re:Bond (Score:2)
No more self-darwination! (Score:1)
New? (Score:4, Informative)
Re:New? (Score:2)
Re:New? (Score:2)
Re:New? (Score:2)
New and Old (Score:2)
I saw this guy interviewed at the last International Builder's Show.
He's been trying to get manufacturers to integrate this technology for about that long. They haven't bitten.
Now, I remember seeing this when it first came out. At that time the technology ruined the motor when it stopped.
The rationale was, "a motor is cheaper than a finger". But judging by the "metal bypass switch" feature, if you cut through a nail by accident, you'd loose your table saw motor. That'
Nope, this isn't new (Score:5, Informative)
The unit I saw demonstrated was a one-use unit. Once the brake was used, it had to be replaced. The system had to be professionally installed, which is very inconvienient unless you have an installer in your city. It was also expensive, relative to the tool. However, when compared to your fingers, how expensive is it really?
Personally, I would never use one of these things. If you use your tools properly, and avoid running 'bad' wood through your tools, you will never have a problem. Avoid distractions, pay attention, and use push sticks.
Re:Nope, this isn't new (Score:5, Insightful)
Since normal people will never trigger the device, they will, of course, never need to replace the device either.
But it sounds like a great system for the one time the dog manages sneak in and it trips you. Or for schools where a kid, every few years, seems to manage to injure themselves.
Re:Nope, this isn't new (Score:3, Interesting)
If you have a safety net, you may be more prone to need it.
I can certainly see a requirement for such a safety device in school workshops, but as I said before, there is no substitute for proper education.
Re:Nope, this isn't new (Score:1, Insightful)
This is a device that should be treated as a feature like the airbag or seat belt. It's there in case something bad happens. Life happens. 99% of the time nothing will happen and everything will be fine, but that 1% is what you have to watch out for.
-Your chances of dying while driving to the airport is higher than flying in a plane
Re:Nope, this isn't new (Score:1)
You say it like it's a joke. Many studies have shown that this is precisely what happens. Not that you're consciously deciding to drive less cautiously, but subconsciously people's perception of safety leads to adopting more dangerous driving habits.
But maybe you consciously fight that tendency.
Re:Nope, this isn't new (Score:2)
Re:Nope, this isn't new (Score:3, Insightful)
Re:Nope, this isn't new (Score:2)
Re:Nope, this isn't new (Score:1)
While I'm sure you're right that it would be a pain to have to stop working to get it to work again, don't you think it might be less cumbersome than having to stop because you lost your finger, hand, or other various appendage?
Re:Nope, this isn't new (Score:1)
Re:Nope, this isn't new (Score:2)
Nope. If it means having to shell out $300 to replace the (now mandatory) device, I'll probably be more careful than I was before.
Re:Nope, this isn't new (Score:2)
just don't tell people the safeties are in place then... but these are meant to protect you from ACCIDENTS.
saying that you would "never use them myself" is pretty stupid, kinda like saying abs brakes cause more accidents than they save..
.
Re:Nope, this isn't new (Score:3, Insightful)
Why? Because I know how to use my tools, I work in a safe environment, and I make sure my tools are in good working condition. If you don't know what you're doing, or are careless, or, or or, then sure, purchase a safety device to protect yourself. What I'm saying is that if you DO know what you're doing, you won't need it.
For places like schools and pu
Re:Nope, this isn't new (Score:4, Insightful)
accidents aren't planned, they just 'happen', usually because something that you didn't expect happens. then it's quite good to have a failsafe.
besides, it looks like it still would hurt enough to not joke with the thing.
there's plenty of people in the world who have operated some devices for 20-30 years and then had an accident, why would you be different from them? People that think that they know what they're doing have accidents all the time.
Re:Nope, this isn't new (Score:2)
. I'd like to be able to teach my kids to use such a device (at an appropriate age) knowing that they could be reasonably safe during the learning curve.
. I'd like to know that if I was having a really bad day and did something really stupid that i'd walk away with all my extremeties still attached.
. I'm nowhere near t
Shop teachers everywhere... (Score:2)
Re:Nope, this isn't new (Score:1)
From the site:
Is the motor or arbor of the saw damaged when the SawStop system is triggered?
No. The SawStop system cuts power to the motor when the system is triggered. When the SawStop system is triggered and the brake strikes the moving saw blade, the saw's arbor assembly disconnects from the worm gear upon which it
Re:Nope, this isn't new (Score:1)
Re:Nope, this isn't new (Score:1)
Why a Hot Dog? (Score:2)
Re:Why a Hot Dog? (Score:5, Funny)
Imagine it - 'Ok, cut.', and everyone fall around laughing.
'BandAid him, take 2'
'no no no - another bandaid - take 3'.
I think the hot dog serves the purpose.
T.
Re:Why a Hot Dog? (Score:2)
Re:Why a Hot Dog? (Score:2)
--
Evan "Plus, the salespeople only have 20 to 21 appendages to demo on"
Re:Why a Hot Dog? (Score:1)
2. ?! If it works for a hot dog, but leaves a notch, you would not want to test it in yourself, would you?
3. flesh is flesh; I suppose the alterations in capacitancy in a hot dog and in an arm is the same.
4. were you trying to be funny?
How does the brake (Score:3, Interesting)
I can just see it now: A retired carpenter is doing a little sawing, accidentally puts his finger in the way but SawStop saves it....at the cost of his life.
Re:How does the brake (Score:2)
(Look under Features->Cartridge)
I guess your saw would be useless if the brake were triggered until you replaced the cartridge.
But that's better than having your arm be useless...
Re:How does the brake (Score:5, Informative)
Of course, they also don't like it because the inventor has been trying to get legal action to FORCE all manufacturers to license and install his device, because otherwise they are 'being negligent'.
Re:How does the brake (Score:5, Insightful)
That's silly. The cost of losing a finger or an arm is greater.
Re:How does the brake (Score:2)
Well, that is true. However, as someone else here said. The risk to the woodworker who does things correctly, doesn't take risks, doesn't go: Well, just for this one cut, etc, is minimal with regular saws.
I agree that this is a good thing, for use in beginner classes, school shops, etc. Though, those
Re:How does the brake (Score:2)
It's really impressive. You get an ugly cut for your trouble, but it's a hell of a lot better than losing a digit.
Taking Bets... (Score:3, Funny)
So what happens if... (Score:5, Funny)
"Yes! I am saved by this power saw that is still miraculously working despite the fiery explosion!"
"NOOOOOOOOOOOOOOOOOOOOO!!! Damn you science!!!"
Re:So what happens if... (Score:2)
Re:So what happens if... (Score:1)
Re:So what happens if... (Score:2)
The really amazing thing is... (Score:2, Funny)
The problem with science... (Score:2)
Re:The problem with science... (Score:1)
Re:The problem with science... (Score:3, Funny)
I'm mostly thinking about the fun tendancy of a table saw to fling wood at you if you aren't careful.
Re:The problem with science... (Score:2)
Man, that would be some demonstration - picking up and dropping a cast-iron table saw? Even with the saw off I suspect it could brake someone leg if they could pick it up.
Re:5 ms eh? (Score:5, Informative)
50 teeth => 50x66.6666 = 3333.3333 tps (teeth/sec)
5 milliseconds is 5/1000 seconds, so...
3333.33333 / 1000 = 3.33333
*5 = 16.6666
So, that's 16-17 cuts, max. The blade is slowing down, and retracting, in that 5ms, so it would be even less than that.
T.
Re:5 ms eh? (Score:3, Informative)
Re:5 ms eh? (Score:2)
The joys of severed limbs (Score:5, Interesting)
Several years ago, I went through training as an EMT in the great state of Pennsylvania. We were fortunate to have our main training classes held in a Vocational Technology college - which meant we had all sorts of great rooms and setups for running scenarios.
As part of our final exam, we were dispatched to the woodshop room - a room full of hundreds of bandsaws, etc. - for a report of a possible bandsaw accident.
Now there are two things we were trained to keep in mind with possible amputations:
1) Find the limb immediately and pack it in ice - it is very likely it can be saved and reattached.
2) The patient/victim rarely realises, due to the shock of things, that they've actually lost the limb. So for godsake, don't let them notice.
We arrive on 'scene' in this gigantic shop room, which had row upon row of bandsaw, and the actor is sitting there, fully done up complete with fake severed hand gushing blood, which she has a towel pressed against. She informs us that she was working on the bandsaw and cut herself, and she thinks it's pretty deep. My partner carefully approaches, lifts the towel - and it's quite clear [thanks to the instructors insistence on proper special effects to simulate the injury] that the hand is completely severed.
Taking the initiative on action point #1, I scan the nearest bandsaws for any sign of the severed limb, and see nothing. My brain takes control before I can think, insistent upon finding this limb, and of course states to the patient "Ma'am, Where is the rest of your hand?"
And as if on cue, the actor flips out and starts wailing and shrieking and flailing, and then descends into shock...
And all I wanted to do was help her find her hand!
[We ended up passing the exam, with a minor downcheck for not being more delicate about the severed limb with the patient - the hand was in the very back of the room. Apparently none of the other groups even thought to find the limb, and took the patient to the hospital immediately].
Re:The joys of severed limbs (Score:5, Funny)
[We ended up passing the exam, with a minor downcheck for not being more delicate about the severed limb with the patient - the hand was in the very back of the room. Apparently none of the other groups even thought to find the limb, and took the patient to the hospital immediately].
How many of the other groups passed? Should I move out of Pennsylvania?
Automatic hunter? (Score:2, Interesting)
I wonder if this same technology might be used to create an automatic, mechanical, cat replacement that uses the meat detector to find mice. (But then again, how would you keep it from eating your neighbor's kitten too?...
Re:Automatic hunter? (Score:2)
False Positives (Score:1, Redundant)
Re:False Positives (Score:3, Informative)
Of course, I don't know what other circumstances could produce a false negative - perhaps touching the side of the blade while spinning, but not the teeth?
Re:False Positives (Score:2)
I do remember a couple people asking about high humidity environments, IIRC they were told that those were being tested. I can't remember exactly what the responses were to the one person who asked about undried(green) wood, but I do remember someone saying something to
Re:False Positives (Score:3, Informative)
Re:False Positives (Score:3, Informative)
The features page [sawstop.com] (which has javascript rollover junk that Safari won't Grok) lists a "Metal Bypass" for cutting metalic or metal-clad stuff, that WOULD conduct enough to trigger the device.
As far as false-positive expense: I'm guessing if the total system cost is only $50-$150, then the replacement
Re:False Positives (Score:3, Informative)
God, you're lazy, but this is /.
sigh.
victimless ? (Score:4, Funny)
Time to send some of these saws to the abattoir.
Now, if it's a victimless breakfast [dotgeek.org] you want
bring it on
Having removed part of a finger myself... (Score:5, Informative)
And I'm normally a very, very careful person on the saw. But between a little kickback, hands in the wrong place, an odd shaped piece I wound up with an avulsion laceration (ripped the skin off the fleshy part of my fingertip about 1/8" wide and bone deep). Quick trip to the ER. Nothing really to stitch up, the doctor left it open but dressed and packed for a couple of weeks. The skin grew back, and I've got a rather odd fingerprint there now.
I'd trade what happened to my finger for the damage done to the hot dog any day.
This needs to be expanded to routers and hand tools. Kickback from circular saws is very frightening.
Re:Having removed part of a finger myself... (Score:5, Funny)
No kidding! My friggin Linksys took off three fingers.
Re:Having removed part of a finger myself... (Score:5, Funny)
>
> The skin grew back, and I've got a rather odd fingerprint there now.
>
I took off a "plate" of flesh from the end of my left thumb while slicing potatoes two Thanksgivings ago. Not only do I now have a puckered blank in the center of my thumbprint, but some touch-sensitive controls (like my iPod's!) ignore the thumb.
On a more positive note, I am no longer asked to help prepare food when visiting my in-laws' house.
Re:Having removed part of a finger myself... (Score:2)
WRT to hand tools, I think that's impractical (being a carpenter
But I'll absolutely agree with you about routers. All too few people realize how dangerous a cutting blade spinning at 20k+ rpm is. Be a harder technical problem than a table saw, tho. But at least it's rather difficult to get your fingers in the way of a router head.
Bet you have developed better safety habits now
Re:Having removed part of a finger myself... (Score:2)
After the incident I got myself a band saw for taking care of those odd little pieces that need to be ripped, crosscut, or just trimmed. For small close-in work it's a much better solution than a table saw and almost as versitile.
Catsense (Score:3, Funny)
I've developed a heat-sensing technology for robotic lawnmowers in this vein... but it isn't meant to PROTECT the neighbor's cat.
Too late for some!! (Score:2)
Lorena Bobbit (Score:2)
Left-handed people (Score:5, Interesting)
Research shows that left-handers are 51% more likely than right handers to suffer accidental injury using tools machinery or other implements
If you're right-handed, imagine having to use all your machinery and tools the "wrong" way (ie left-handed). Even though there are more left-handed people today, the fact stands that the majority of the world's population is right-handed so left-handed products will become nothing more than the niche market it is today.
Re:Left-handed people (Score:2)
Great news ... (Score:3, Funny)
"New Safety Feature Detects Flash"
Nick
Re:Great news ... (Score:1)
if you've ever photocopyied your buns (Score:1, Offtopic)
This buzz's for you.
Deadly accidents and emergency room? (Score:2)
In other news... (Score:3, Funny)
Too bad more safety professionals don't read /. (Score:5, Insightful)
I showed the videos to the Director of the company and immediately it's been making it's rounds through the office. This is exciting technology, this is *important* technology. Ask the thousands of labourers, carpenters, shop workers, around north america who've lost digits to cutting accidents what they think of this technology. No, you won't hear a goddamn negative thing.
Some people have complained about the inventor of the technology trying to make the device mandatory on cutting tools. Is this self-serving for him? Hell yes. Is he still in the right? Undoubtedly. Hard hats, steel toe boots, rebar covers, flagmen, confined space entry, are all areas of industry that are strongly regulated by governments, and made mandatory by law. This should, without a doubt, join it.
One significant aspect of the technology that needs to be addressed however, and raised by a fellow
I look forward to this technology becoming industry standard. The man who invented it is going to be filthy, stinking rich, and definetly deserves to be. That's what innovation leads to; success.
And for the rest of you going on about "You don't need this if you're careful.", I call bullshit. You need a hardhat, you need safety goggles, you need steel-toe boots. *YOU* can be careful, but you can't control all variables around you. That's why they're called 'Accidents' when they happen.
Hard hats and steel toe boots aren't patented. (Score:2)
Mandatory single sourcing from a non-competitive market leads to bad design.
For one thing, if all bandsaws must have SuperStop technology, the owner of the patented SuperStop technology suddenly has complete control of who can make bandsaws.
Why make a 6 stops SuperStop when there's no competition against the current 1 stop model?
Yes this technologies great, yes people who say "but I'm too careful" are idiots, no this patented technology s
Re:Too bad more safety professionals don't read /. (Score:2)
It may not be technically feasible. You don't expect to reuse an airbag in a car, do you? It may be disproportionally expensive (6 stop version might cost 10x what the one
Frickin Lasers (Score:2)
This reminded me of the newish Craftsman circular saws that shine a laser beam along the wood surface to be cut. I haven't been able to find technical details on how exactly it works, but if the laser is mounted to the saw, isn't this similar to being guided by your car's headlights?
Am I the only one... (Score:2)
Lawnmower (Score:2)
Works on cars also (Score:2)
*BEEEEEEP!*
"Hey! We just hit a.....ooops"
If they could get this system to work at a distance it would be a breakthrough in hitting on girls from your car.
Do we really want to stop these? (Score:2)
http://darwinawards.com/stupid/stupid2001-07.html
(blinks) what? (Score:2)
> emergency room due to deadly accidents.
That's odd. Guess you're Canadian. We send our fatalities to the morgue instead.