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Awsome CNC videos

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  • Awsome CNC videos

    got bored so i found these amazing cnc videos on the net

    1. http://video.google.ca/videoplay?doc...08454075&q=cnc

    how is it possible for the stock to move like that while the collet is turning? doesnt it have to be tight?

    2. http://video.google.ca/videoplay?doc...79259387&q=cnc

    3. http://video.google.ca/videoplay?doc...34738044&q=cnc

    watch the first 10 seconds of this video, this has got to be fake, or is it?

    4. http://video.google.ca/videoplay?doc...65630790&q=cnc

    This is one serious machine alright. Jaw-dropping!

    5. http://video.google.ca/videoplay?doc...08456566&q=cnc

    Close up of the stock moving during machinning in the collect, doesnt the stock have to be pre-machined for this to work?

    6. http://video.google.ca/videoplay?doc...36784411&q=cnc

    U-axis machining, pretty cool!
    Last edited by Elninio; 08-06-2006, 01:49 AM.

  • #2
    In number 1 calling that Tsugami BS26B-III Swiss type CNC lathe a "lathe" is like calling Bruce Lee a scrapper. That thing has more tricks up it's sleeve than a circus monkey.
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    • #3
      You think that's impressive? You should some of the high end Citizens - they actually have whirling attachments(primary users are medical - bone screws) as accessories.

      There are actually 2 collets in the machine, the guide one, which is set just loose enough to for the stock to slide through(this takes a real touch - I've heard of guys still not getting it right after a year)yet not deflect, and a second one in the sliding headstock that clamps and rotates the part. The key to this working well is stock diameter variance - the less the better.

      It gets better. I've run Citizens at 11K rpm with fixed(non rotating) collets.

      The niftiest thing to come along for these machines is something some guy in germany invented - it's air pressure set collet - even with variance in size, it gives the same amount of pressure on the working collet. Citizen has been trying to buy the rights to it for years, but the inventor refuses to sell. If you want one though, be prepared to wait. German Tool and Die makers operate in their own little worlds.


      HTRN
      EGO partum , proinde EGO sum

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      • #4
        Ah, yes. Took me a while to get my head around the idea of sliding the stock through the collet, but then think of it as a collet-mounted, rotating steady rest. Wouldn't it be possible to have a constant-pressure collet that holds the part as securely as desired, yet doesn't require such finesse by the operator or programmer?

        I thought it was pretty clever to cut the demo parts in free-machining brass, too - no coolant flying around, so you can better see what's going on.

        Also, in homage to the old thread in the archives about the TV show "Hot Dog" that ran in the early '70s: When I see parts like that and watch them being made, I can never help thinking "I wonder what that is, and what is it used for?"

        I always like watching parts being "profile milled", where they mill something that really should be cast. Yeah, I know it's not the strongest way to make a part, and it's a terrible waste of material, but machines that can hog out nearly any shape from a chunk of nearly any material are fun to watch. If I were as rich as Mr Gates, I'm sure I'd have one or two...
        The curse of having precise measuring tools is being able to actually see how imperfect everything is.

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        • #5
          I love CNC videos and have collected quite a few. This is a nice list.

          BTW, you wouldn't have to be Bill Gates to do 3D profiling. Lots of it going on using converted Asian tools and stepper motors driven by Mach 3 on PC's. The total cost is probably in the 2000-3000 range. People are converting lathes, mills, and building machines from scratch to serve as 4' x 8' router tables or plasma tables. It's pretty amazing stuff.

          Is the swarf in #2 red hot or is that just a lighting artifact? That thing is cooking, but I would have thought they want to run even faster to break up the long strings. Perhaps this is better for the fine finish.

          Dang, I had to smoke a cigarette after all the Tsugami videos. They show how CNC killed the manual machines, as well as the need for very many machinists. You can see why. It would be tough to keep up with one on a South Bend.

          All the shots are dry machined, with no coolant. I understand this is a common practice if you are machining fast enough (HSM).

          Best,

          BW
          ---------------------------------------------------

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