[Lab] Lab Digest, Vol 55, Issue 37
darcy at siteware.com
Tue Sep 30 12:49:11 EDT 2014
Or just do something really simple like this:
On Tue, Sep 30, 2014 at 12:30 PM, Darcy Whyte <darcy at siteware.com> wrote:
> I can't think of anything better than concentric brass tubing...
> You may be able to drive them with gears instead of a belt as they can be
> thinner.. or a combination. I suppose if there were four different sized
> gears, then each could mate a pinion and they could be al l/4 inch apart so
> the gears are just 1" deep. Even less... belts are all kinda fat I find...
> and more parts.
> Hey wait, you could drive two from the front and two from the back. You'd
> wind up with stuff on the face but it might be interesting....
> Or drive two from the front and at the back have a gear and the centre
> shaft direct drive...
> Or drive them with some sort of magnets... if each of the hands/rotors has
> a magnet at a different radius perhaps there's a way of driving it that
> way.. could be getting more complicated but might be worth thinking about...
> You can drive the face too... Oh, and lights can animate freely without
> any mechanical (as you already know as I can see that in one of your
> Oh here's one.. a two axis arm could move all the hands like a pick and
> place. Catch is it'd have to be on the front (I think). Imagine a servo
> that rotates an arm in front of the arms. an appendage reaches down to
> adjust the arms just as a human would. Would make for some interesting
> patterns as it resolves conflicts (such as passing an arm near the face
> underneath an arm further from the face).
> Oh, if you want to go three axis, then the mover could be off the axis
> (could retract off to the side). Or even a gantry.
> With that you can have as many arms as you want...
> Rather than replicating this thing, just have it large enough to reach all
> the faces...
> Getting crazy... but this is all thought. :)
> Darcy Whyte
> Software Since '88 siteware.com | Contact: darcy at siteware.com |
> 613-563-3634 by appointment
> Canada N 45° 25'03.1" W 75° 42'21.4"
> Art+ inventorArtist.com <http://inventorartist.com/> | Aviation
> On Tue, Sep 30, 2014 at 12:12 PM, Adrian Jones <adrian at woodsgood.ca>
>> I've also been thinking about making some sort of concentric shaft system
>> handling up to 4 shafts for a piece of art that I have in mind. I would
>> 6 separate shaft systems and hence 24 steppers but hey, art does not come
>> easy (tee hee)!
>> The best idea I've come up with so far is to use a set of incrementally
>> larger brass sleeves (as brass is self lubricating) with similarly toothed
>> cogs soldered/glued to each one. Carefully sized nylon spacers would be
>> to keep everything aligned and spaced. A toothed belt would connect each
>> (and sleeve) to its own stepper motor.
>> Just thinking...
>> .... Adrian_the_Canadian
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