7 ms·

AFAIK all sawstop catridges are one time use only and also destroys the disk. This is not really a bug.

• lazide 2y ago
  Yeah, reliably stopping a heavy very fast spinning object in just a few degrees of rotation is necessarily violent.
  • DannyBee 2y ago
    Actually not. My handguard saw will do as well as the sawstop non-destructively (independently tested and verified, so you don't have to take their word for it). They do it (basically) by predicting whether your hand will touch the blade, rather than waiting until it does touch the blade. If you wait until someone actually touches the blade, then yes, you have to operate very very fast. That is unavoidable due to physics, as you say. But if you can gain 100ms or 250ms by proving a 100% probability that the hand will touch the blade before the person can stop it, you now have a lot more time to stop the blade.
    • lazide 2y ago
      How is that going to work reliably with sawdust and the like everywhere? Some kind of radar?
      • Snoozus 2y ago
        two cameras
        • DannyBee 2y ago
          also, the saws do not produce dust everywhere. these are European saws. Dust extraction is not only required on the saw, It’s required by law in the workplace. This saw will not operate unless the safety + extraction hood is in the proper position and dust extraction is hooked up I can show you a video of an air quality meter sitting between the cameras and the saw hood if you want. The amount of particle change is minimal
    • Fraterkes 2y ago
      Ive looked at the saw you mention in another comment, and in all honesty Id much rather have a safety precaution that works based on very simple physics (like sawstop) than some black-box ai hand detection algorithm.
      • DannyBee 2y ago
        To each their own. Computer vision of this kind is not like cutting edge ai. This is pretty standard fare and has been for decades
        • kevin_thibedeau 2y ago
          Optical mice fail with too much dust on the lens. It's risky to depend on a vision system in a machine that is generating dust.
          • DannyBee 2y ago
            Have you considered that they've thought of this? Seriously. This is company producing high end sliding table saws that cost tens of thousands. They've been at it for over half a century. This is not someone producing a 299 saw as cheaply as possible. They are a German company (ie regulated heavily) and have a ridiculous number of safety standard certifications that test things like "what happens when there is dust" do you really think they haven’t thought of the obvious basic issues and figure out what to do about them? if so, what evidence do you have that this is true? (Also I think you don't understand European requirements on dust extraction and allowed exposure to wood dust. This saw does not produce a meaningful anount of dust)
            • beepboopboop 2y ago
              I’ve seen more bugs in software rather than hardware, I’ll tell you that.
    • stavros 2y ago
      But what can happen that will mean that your finger will touch the blade in a quarter of a second? I can't think of anything, short of dropping a person on the saw.
      • danielheath 2y ago
        Holding a piece of wood and sliding it along a table saw (to cut it) is the canonical method for losing a finger, and you could definitely pick that out with a relatively simple bit of computer vision.
        • stavros 2y ago
          Yes but there's no way for me to not be able to pull my hand back in a quarter of a second for that.
          • DannyBee 2y ago
            Are you saying you tink you will notice and react? Because that's what doesn't happen and people lose fingers.
          • danielheath 2y ago
            The world has a _lot_ of guys with seven fingers who used to believe they would never be so careless.
            • DannyBee 2y ago
              I used to have a house that backed up to a county park in Maryland. My shop was out back. I was working carefully at my sawstop (that is what I had back then), standing properly to the left of the kickback path and using a push stick and roller guides. I was just finishing a cut A hawk decided to throw a dead animal at the window behind me hard enough to shatter it. I was startled and my hand moved enough for my palm to cross the top of the blade. I would not have lost fingers most likely but it would have been very bad. To your point accidents are not always foreseeable. Yeah some people work stupidly but plenty of times, It’s just random unexpected events.
  • bradly 2y ago
    The blade doesn't have to stop. Some saws have the entire blade assembly lower. If you walk the table saws at AWFS you'll see all types of different safety systems.