Circular Saw Kickback Killer (We used science to make tools safer) - Smarter Every Day 209

  • Published: 17 February 2019
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    Technical details about what we're doing:
    We're working on a time-series problem called a Sequence Classification. Recurrent Neural Networks called Long Short-Term Memory (LSTM) networks are good for that. It’s what they use for natural language processing because it can remember context from the sentence you’ve just spoken. In this case its used to analyze not just the current timestamp of data, but what has been happening for the last 20 - 250 ms, which helps to reject false alarms.

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Comments • 6 327

  • Chad Green
    Chad Green  9 months back

    Also, #gonadularregion is safe!

    • Scruffster
      Scruffster  2 months back

      @Chad Green keep consumer costs down and it's a great idea. Don't just jack up the price and say "Isn't your life worth the cost". Of course it is but as you say a riving knife is likely just as good and what $2.00 maybe ?

    • Brian Landers
      Brian Landers  5 months back

      ramzekeleviathan : You're right about using a wedge, but I would never use metal near a spinning circular saw blade, because that metal will go through safety glasses like a hot knife through butter. I really enjoy my eyes. Since you're working with wood, use a wooden wedge or plastic, since it's so abundant. I'm just saying.

    • Antonio Claudio Michael
      Antonio Claudio Michael  6 months back

      @ramzekeleviathan knots in wood can cause kickback

    • jay dellinger
      jay dellinger  6 months back

      @Schwurbel kickback is the result of the saw flinging wood or the saw it's self back or forward. 🤦

  • auto_chris420
    auto_chris420  15 hours back

    But would the gyroscope and computer work in in no gravity or air

    • auto_chris420
      auto_chris420  15 hours back

      Perfect if you're in a spacesuit and you don't want to rip your suit by mistake

      • riffrocker
        riffrocker  3 days back

        I see why they dont call it a "skillsaw" anymore

        • A Man of Dust
          A Man of Dust  5 days back

          How would you use this on a table saw. Table saws dont move, and their are many more fingers lost with a table vs. circular saw. Only thing is since it doesn't move, The gyro, and acc. willl not work, correct?

          • Frank Mcchesney
            Frank Mcchesney  5 days back

            hmmm, two guys with NO shop experience. If you put downward weight on the saw while pushing it forward you will have way more response time to kickback. No one ever uses a saw in the fashion that you just tested.

            • Lucas Smith
              Lucas Smith  6 days back

              Omg this is amazing!!! I have had this happen many times. Thank God I haven't lost any fingers, or skin at all, but great idea, and this should be mandatory!

              • alexander rasmussen
                alexander rasmussen  1 weeks back

                This is sorta like Sawstop for circular saws

                • Vincenzo M
                  Vincenzo M  2 weeks back

                  High Four Everbody!

                  • Jace Harris
                    Jace Harris  3 weeks back

                    My name is Jace, I’m 16 years old. Saturday, October 19 I cut off my thumb with a circular saw

                    • minnsminns
                      minnsminns  3 weeks back

                      Next week: we set a car driving with no driver and it crashed!!! :O
                      What a stupid experiment, of course it kicked up, it had no-one holding it and absolutely no weight on it. They are literally designed to be as light as possible.

                      • Seth Warner
                        Seth Warner  4 weeks back

                        Ahem!!This is not a hand saw! It is a circular saw! OK, back to the video.

                        • Juskallmedaddy
                          Juskallmedaddy  4 weeks back

                          Ive actually cut my leg open pretty bad bc of kickback so this would be great

                          • Mitch Waters
                            Mitch Waters  1 months back

                            Take into acct that you're holding the saw, whether you let the trigger go or not.

                            • Man4Concrete
                              Man4Concrete  1 months back

                              Good work. We always have new guys and try to teach them the dangers but they get comfortable and an accident can happen. I’d definitely use this to keep the newer guys safe. Absolutely

                              • brettburrington
                                brettburrington  1 months back

                                Dewalt got that kick back

                                • Christopher Thompson
                                  Christopher Thompson  1 months back

                                  K, firstly if you work construction you know to avoid this by placing wood properly, secondly you feel the tension on the blade, telling you if your in danger of a kickback

                                  • Kenneth Gradin
                                    Kenneth Gradin  1 months back

                                    No 1 security, never pull anything dangerous against you

                                    This saw spins in the wrong direction if you want a saw to pull
                                    And I have never seen a saw where you use it in drag factor

                                    The only pushback I have is from the saw table when I'm almost done.
                                    And that pushback can't be fixed with an AI and gyro sensor when the machine has much more weight than the material.

                                    • Payshie H
                                      Payshie H  1 months back

                                      8:00 Remnants of the Alabama circular saw massacre?

                                      • William Danko
                                        William Danko  1 months back

                                        Please make this for ROUTERS!

                                        • Arab Thanos
                                          Arab Thanos  2 months back

                                          my father lost his finger due to circular saw kickback

                                          • James Olsen
                                            James Olsen  2 months back

                                            I have used these a lot i always hold them very tight

                                            • Ivan Zubov
                                              Ivan Zubov  2 months back

                                              Wouldn't it be cheaper easier and more reliable just to put a limit switch or some proximity sensor on the base plate?

                                              • Commenter
                                                Commenter  2 months back

                                                You should do something cool instead.

                                                • Sebastiaan Rijkens
                                                  Sebastiaan Rijkens  2 months back

                                                  Indeed, 👍🏻👍🏻👍🏻what an incredible invention

                                                  • Track Thismotherfuckers
                                                    Track Thismotherfuckers  2 months back

                                                    How about just be a MAN? (Or women Or LGBT H J QRZ 😂) Be competent with your tools!

                                                    • Matt Silcott
                                                      Matt Silcott  2 months back

                                                      Construction workers worse nightmare=extra safety's we already have to remove trigger safety that prevents you from comfortably using a saw with both hands we remove the blade guard because you cant start cutting mid board without also holding the guard @smartereveryday please leave my tools alone.... if you put all these sensors how can I throw my saw in the toolbox in a trailer that jostles it around as construction workers often do without having to buy a new 1 or have it repaired constantly. I love the channel I too live in Huntsville Alabama

                                                      • 420drwilldo
                                                        420drwilldo  2 months back

                                                        Thats cool and I understand what your trying to accomplish but laying out good lines and making sure your work is probably supported makes this a non issue knock on wood ive been a carpenter for 15 years and ive never really had this happen except wen I was a Apprentice and even then not that much because we had to lean the fundamentals with hand saws first before they would let us touch power tools and saw stop was the invention of patent trolls

                                                        • Thewicked
                                                          Thewicked  2 months back

                                                          most of this can be avoided by letting the blade guard do its thing and not have it pinned back

                                                          • lord long march.
                                                            lord long march.  2 months back

                                                            I don't know if you thought about the zombies on this but kick - back is scary.

                                                            • Shawn Lewis
                                                              Shawn Lewis  2 months back

                                                              Since it's software it will only be a 5 year patent. If you can figure out how to make an outlet that will improve the safety of the saw (or perhaps a battery compartment with the electronics in it), then I think you can get a 20 year utility patent.

                                                              • Dima Visozki
                                                                Dima Visozki  2 months back

                                                                I dont know, quick search on google shows that this stuff already excite, how is your different from those ?

                                                                • relikvija relikvija3
                                                                  relikvija relikvija3  2 months back

                                                                  It snapped in the middle while I was using it.

                                                                  be careful!!

                                                                  • dana kovacevich
                                                                    dana kovacevich  2 months back

                                                                    Don’t let go. Experience. Experience. This is a video for nontradesmen.

                                                                    • Tanner Houston
                                                                      Tanner Houston  2 months back

                                                                      or when you are pushing the saw and feel resistance you back off a few inches and let the blade cut all of the material instead of forcefully pushing it forward while its being pinched. its pretty simple but what do i know im only a carpenter that uses a circular saw for a living.

                                                                    • BimBamBop Gazoiks
                                                                      BimBamBop Gazoiks  2 months back

                                                                      would be more worried about tablesaw kickback than skillsaw kickback, seen ribs get broken on multiple occasions

                                                                      • Nick Carver
                                                                        Nick Carver  2 months back

                                                                        Should we learn to brace our work properly, keep our body out of the path of the saw, as well as cutting straight first? Very cool though.

                                                                        • Donald Trump Mexicano
                                                                          Donald Trump Mexicano  2 months back

                                                                          Hi I'm impressed on this prototype because it's amazing that only 2 guys can do that and an entire brand can't. I hope they do, my dad once was cutting a pice of wood and the saw came back and cut his thumb off

                                                                          He it's ok he was lucky and the doctors could put his finger back now he has reduced mobility but he has his finger back Also, I have to see that all the episode the saw going back the finger hanging from his hand and everything

                                                                          I hope that this will be introduced in all countries and that it can be bought as an accessory or something like that.

                                                                          Greetings from Argentina

                                                                          Sorry for my English but it's not my native language

                                                                          • jay t
                                                                            jay t  2 months back

                                                                            Hate using those... Rather take it into work and use my band saw.

                                                                            • Mike LaBarge
                                                                              Mike LaBarge  2 months back

                                                                              I know about this their was an entire pink panther episode with this

                                                                              • Landa Roon
                                                                                Landa Roon  2 months back

                                                                                Reply to Brad not Landa
                                                                                Having done remodeling and homebuilding for 30 plus years, I've had a few kickbacks. None were really hairy. Know how your wood will move and you can prevent binding. Set your wood and area up so you're balanced, comfortable and safe.

                                                                                I much prefer saws without any brake. That way when you have to make a long rip cut and let the saw stop to adjust your footing, grip,, etc, it doesn't torque and make a sloppy cut.

                                                                                • NAWW
                                                                                  NAWW  2 months back

                                                                                  Why don’t they just reverse the spinning direction of the blade so it doesn’t go toward the user

                                                                                  • Ethan
                                                                                    Ethan  2 months back

                                                                                    Because it is not designed to cut that way.and if that were the case it would want to leap forward,and in that case it would ruin some cuts.

                                                                                • Richard Lewis
                                                                                  Richard Lewis  2 months back

                                                                                  Your time would be off just buy the simple fact there's no downward pressure From the user . In wood workers already have a solution to kick back put a chisel in your cut for long reps

                                                                                  • THE ACES
                                                                                    THE ACES  2 months back

                                                                                    1:47 this is how nightmares are made

                                                                                    • ericdirtbiker
                                                                                      ericdirtbiker  2 months back

                                                                                      I'm a carpenter and this is legitimately useless. The kick back doesn't even happen like that with force applied the blade just stays in the wood

                                                                                      • Ron Micjan
                                                                                        Ron Micjan  2 months back

                                                                                        This could be adapted to a table saw, the transients would just be smaller and different, still the same parts, just different custom software for the larger mass. If a VW and Semi get in collision, both vehicles change speed and vectors, just different amounts.

                                                                                        • Teddy Woodburn
                                                                                          Teddy Woodburn  2 months back

                                                                                          Why didn't this get recommended to me earlier!?

                                                                                          • irlrp
                                                                                            irlrp  2 months back

                                                                                            Er ok, i've had a piece of steel that is standing behind the blade to keep the spacing after the cut from "colapsing" and doing this, so idk...
                                                                                            (excuse me if it's not super clear, i'm not a native english speaker lol)