Hanging chain clocks

Timing Chain [ponoko.com]


15 Responses to “Hanging chain clocks”

  1. EH says:

    Should have the numbers in the other direction, and I guess clock motion to match.

    • awjt says:

      Exactery what I was thinking.  It should be represented like a clock face and there could be a secondary chain with 00-59 in smaller numerals for the minutes.

  2. BrianOman says:

    I kind of the like the surreality of counter-clocks. I think the chain drive is just fine in the direction it is in.

  3. sockdoll says:

    “Handmade,” using laser-cut and industrial components which can’t be assembled by the end users.

    Curse my common hands.

    • phisrow says:

      Their particular offering appears to not be available in kit form; but(aside from the motor module, which I’m pretty sure they got right off the shelf, along with screws, bushings, the chain, etc.), I don’t see anything that couldn’t be duplicated with a jigsaw, a chain tool, and a modest collection of drill bits and screwdrivers…

      I’m assuming that the chain tool(especially if the chain is a different size than a common bicycle chain) is the presumed sticking point. 

  4. hohum says:

    It’s tricky… While the ‘numbers’ go in the wrong direction, the ‘thing that moves’ goes in the right direction. Since these are one and the same, a design choice must be made… I think I’d prefer it this way, but it’s difficult to say for certain without actually seeing it work, and whether my instinct would be to read quarter of or quarter past, when one comes up… I do wish there were more minute-less clocks out there, though…

  5. anderalert says:

    Dusting nightmare.

  6. Dewi Morgan says:

    One thing I’d be wary of when creating this is that 11 and 12 are heavier than most numbers. Unless all the numbers were close enough in weight that the motor’s torque makes it irrelevant, half the day will pass faster than expected, and half slower.

    • phisrow says:

      If the motor is under-spec, that would be an issue; but ‘synchronous’ motors, by design, run at a speed determined by the frequency of the drive current unless overloaded, when they stall.

      Given the plummeting cost of doing things with silicon, sensors, and a little feedback cleverness, you could probably make something like this work(particularly given how coarse the resolution of the ‘display’ is), with a normal brushless motor and a driver circuit that counted links as they passed and sped up or slowed down as needed; it might even be cheaper to do it that way.

      A synchronous motor, though, handles the compensation for changes in load, within its limits, purely by electromagnetic cleverness…

    • brainflakes says:

      It’s a synchronous A/C motor, so it’s synchronised to the mains frequency (50 or 60hz) and thus turns at a constant speed independent of torque.

  7. SamSam says:

    Man, I had plans to build something almost identical to this even before this idea was first published on BB two years ago, and I still havem’t done so now that it’s been posted a second time. Sigh… too many projects and too little time. I have, finally, bought a high-torque clock motor for it.

    At least these commercial versions have dropped in price — the one posted two years ago was over $2000. That said, that one was a lot prettier. This is perfect — the one I am going to make would probably have looked more like this, but now that I can see them side-by-side, I can decide whether I ought tocompress and hide my gearing.

  8. SparcMan says:

    This has been Tweeted by Adam Savage

  9. AA says:

    - You are late!
    - My clock got derailed!!!
    (Avoid such surprises with Shimano Chronographs…)

  10. Jim Sands says:

    Email from the maker:

    Due to overwhelming demand, I am temporarily out of the pre-built clocks.  I am in the process (yes, I’m a one-man shop, with a day job) of building more, but the building process takes about 10 business days, depending on how quickly ponoko can produce the laser-cut parts. 

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