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Tuesday, July 28, 2009

The RepRap Clock


We needed a clock in the RepRap Lab at Bath University. So, of course, we made one.

It's shown mounted on the MDF build platform from ARNIE - the very first prototype RepRap that we made. See RepRap history at:

blog.reprap.org/2007/02/arnie-gives-it-shot.html

Naturally the hours are in binary...

Full build details and all files are here on Thingiverse.
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8 comments:

  1. tell leo onceJuly 28, 2009 3:58 PM

    7 through 12 appear reversed. If you're going to use binary why not make a music box design with bump patterns to actuate the binary indicators.seedge

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  2. tell leo onceJuly 28, 2009 4:00 PM

    This comment has been removed by the author.

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  3. Adrian BowyerJuly 28, 2009 5:17 PM

    "7 through 12 appear reversed"

    No - the numbers simply run round the circle, as they would on a clock with Roman numerals. (Clocks with Arabic numerals always have the numbers vertical regardless of their position round the circle; this would obviously not fit with a bit string.) Google Image "clock face" to see what I mean.

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  4. James Mastros (theorbtwo)July 28, 2009 7:58 PM

    Why'd you build this in so many separate sections?

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  5. Forrest HiggsJuly 29, 2009 12:03 AM

    I love the binary. :-)

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  6. False DataJuly 29, 2009 1:21 AM

    I love the simple elegance of the clock face. Would the whole clock, including a (gravity-driven, pendulum-regulated) movement and back-plate to mount the gears, be within the current state of the art of reprapping?

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  7. Adrian BowyerJuly 29, 2009 2:52 PM

    "Why'd you build this in so many separate sections?"

    It's quite big, so the whole thing won't fit on the RepRap bed as one. I could have built it in 4 quarters, but 12 hour segments seemed more natural. And printing time is proportional to volume, so _how_ you split an object doesn't affect the efficiency from that perspective.

    "gravity-driven, pendulum-regulated"

    If one was prepared to make the clock quite chunky, then I think this would be possible. We can certainly do gears - I've just done some for an experimental extruder I'm working on. I think that the axles/shafts would probably have to be brass. There might be a problem with wear - particularly on the escapement. That would probably have to be made out of something quite hard (ceramic paste, then fired, anyone?).

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  8. JoelJuly 31, 2009 12:50 AM

    Any plans to make one that snaps together, so as not to require glue?

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