Simple screw counter

(mitxela.com)

69 points | by jk_tech 2 days ago

10 comments

  • irjustin 15 minutes ago
    At scale, use weight and supply 1 or 2 extra.

    This is how pretty much every IKEA, LEGO, etc works with very small, cheap parts.

    End users benefit because it's easy to drop/lose/break one.

    • medi8r 2 minutes ago
      Or a vibrating seperator which can give perfect counts if needed.
    • kristianp 12 minutes ago
      So that explains why the smallest parts often have spares in ikea and lego builds. Is this done because of the error in weighing the smallest parts, so they have a margin for error by allowing for an extra 1 or 2?
  • bschwindHN 54 minutes ago
    > You can probably guess my opinions on it though, the software is very good but the cloud-based vendor lock-in is grating, and the free tier is hobbled beyond the point of usefulness. On the plus side, being browser-based, it works perfectly on Linux.

    > The 1.1 release of FreeCAD should be soon. I really want FreeCAD to succeed, but blimey they have a big hill to climb. My fingers are crossed.

    Since these parts mostly seem to be laser cut acrylic (so mostly 2D), it seems like solvespace would do a good job at cranking out the designs. I haven't used it for a larger project like this though, maybe it was already considered.

  • LiamPowell 19 minutes ago
    > the (OnShape) free tier is hobbled beyond the point of usefulness.

    The free tier is identical to the standard tier except you can not create private documents and it has a no commercial use clause. This has been the case for many years, so I'm not sure where "hobbled beyond the point of usefulness" is coming from.

  • kennywinker 1 hour ago
    I love this so much. Such simple machines, for human-scale problems. I often get pulled down rabbit holes of machines and automation - this is a nice reminder that you can solve a lot of problems without reaching for an arduino or a servo.
  • blorenz 1 hour ago
    Awesome solve!!! Lasers and 3d printing is my side hobby business and is what keeps my sanity intact. I love seeing the practical creations that are realized by them! One of my core tenets is being self-sufficient and achieving efficiencies. This post is exactly that. Well done.
  • sudo_cowsay 26 minutes ago
    a small scale problem = assisting device

    a medium scale problem = a better assisting device

    a large scale problem = hire people

  • earleybird 1 hour ago
  • chrsstrm 2 hours ago

      >> I have wasted a significant chunk of my life counting out small numbers of parts into bags and posting them to people.    
    
    So, small parts like this are always counted by weight, and I'm wondering why you would spend so much time on a counting solution when "buy a scale" is right there.
    • jstanley 2 hours ago
      He's counting out like 6 at a time. He needs a fast way to pick small quantities precisely, not a fast way to check large quantities. Once they're picked they're easily verified by eye.
    • bravoetch 53 minutes ago
      Yes it's by weight when you need exactly 20k tiny screws in a box. But when you need six that won't save you any time.
    • kamaal 2 hours ago
      Until counting machines got ubiquitous, banks in India would count notes/bills by weight as well.

      It wasn't very precise but you could move a lot of money in ball park with this method. Atleast internally across branches.

      • ghshephard 2 hours ago
        Up to roughly 100 bills it's pretty much bang on - even with a cheap $10 scale (American Weigh Scales Digital Pocket Scale has a bunch of different options). Each bill weights roughly 1 gram. So - accurate to within 1% - and presumably the banks have better scales.
        • eru 1 hour ago
          I suspect at scale (moving either a lot of batches or large batches), you also need to take variance into account more. Some bills might be dirty or have stuff stuck to them, some bills might be damaged and have bits missing? And other things that occur in practice that I can't think of from the comfort of my armchair in 30s.
  • nehal3m 28 minutes ago
    Push button, nut.
  • abstractspoon 2 days ago
    Insane!