[Lab] human powered art

Wed Jan 26 11:41:56 EST 2011

On Wed, Jan 26, 2011 at 11:12:50AM -0500, Darcy Whyte wrote:
> Sorry I was up to my eyeballs for a few days there...
> 
> It's looking like it will be mail order to get a go-kart motor or two. Let
> me know if you want one or two and I'll up the order.

What models are you getting and how many?

> Your right, a bicycle configuration is probably the easiest. I was thinking
> of the size though. I'll try a few different things and see what emerges.

Hmmm, making it easily adjustable is an important point.

> On Tue, Jan 25, 2011 at 12:25 AM, Richard Guy Briggs <rgb at tricolour.net>wrote:
> > On Mon, Jan 17, 2011 at 12:20:02PM -0500, Darcy Whyte wrote:
> > > Hi Richard,
> >
> > Hi Darcy,
> >
> > > What it looks like though is that those go-kart motors are attractive.
> > Also
> > > the home made generators (parts from volvo and such) look good but I
> > think
> > > the go-kart is a little more accessible to me at the moment so I will
> > > probably look at that.
> > >
> > > Plus if I ever get the urge to make a motorized scooter I'd have the
> > motor
> > > on hand.
> > >
> > > I'm pretty sure the steppers are too small (and the go-kart industry is
> > > price friendly as it's also a scaled up industry).
> > >
> > > Not only that you get DC out of the go-kart motors which might be more
> > > handy.
> > >
> > >  I was at Princes Auto yesterday and they didn't have anything like it
> > > floating around.
> >
> > Hmmm, I had wondered if they might have anything like it...
> >
> > > So I will start a prototype using one of those motors.
> > >
> > > I guess once I get one or two of those motors I can start to look at
> > > different ways to drive it with human power.
> >
> > So do you have a local source for them yet?  Or are you going to mail
> > order them?  I'd be curious to grab a couple if you do.
> >
> > > -user pushes a wheel around
> > > -user rows
> > > -user pedals
> > > -user wears a harness and pulls cable off a spool to create rotary motion
> > > -user wears a harness and does squats to pull row spool. (two people
> > could
> > > do a teeter totter action like that
> > > -user hand cranks
> > > -user pulls a rope like a tug-a-war
> > >
> > > Obviously to get the big power we're going to need the legs in on this.
> >
> > I suspect that something recumbent with pedals is going to be the most
> > efficient and comfortable.
> >
> > > On Sun, Jan 16, 2011 at 8:38 PM, Richard Guy Briggs <rgb at tricolour.net
> > >wrote:
> > > > On Sat, Jan 15, 2011 at 06:12:24PM -0500, Richard Guy Briggs wrote:
> > > > > On Fri, Jan 14, 2011 at 07:14:29AM -0500, Darcy Whyte wrote:
> > > > > > I would like to make a human powered generator for an art project.
> > > >
> > > > > > I am curious if a couple of NEMA 34 motors is large enough to
> > capture
> > > > all
> > > > > > the power that a human can generate.
> > > >
> > > > > Do you have a link for your NEMA 34 motor specs?  I've seen anywhere
> > > > > from 50W up to 500, so it sounds like those might work!
> > > >
> > > > > > I'm suspecting that a stepper motor is a good candidate to make the
> > > > > > electricity. I think the first part of the project is to make up
> > some
> > > > BOMs
> > > > > > that show what motor to use, the RPM that it would require and
> > parts
> > > > for a
> > > > > > rectifier and whatever else is necessary to operate in these
> > > > applications.
> > > > >
> > > > > I've got lots of small ones, so I can try some tests and see.  I
> > > > > wouldn't have thought they would work because the rotor I thought was
> > > > > unmagnetized steel.
> > > >
> > > > I now understand that NEMA 34 is a mounting plate standard.
> > > >
> > > > So, looking through my box, I have one NEMA 34 motor and four NEMA 23,
> > > > plus about eight NEMA 17 or smaller as well as a bunch of other smaller
> > > > assorted steppers.
> > > >
> > > > The NEMA 34 is a Matsushita 1HHS-486CS, 6V, 2.2ohm, 1.8 deg/step 6-wire
> > > > unipolar.  I can't find any info about it on the net.  My guess is it
> > > > its max rating is around 36W, maybe double that depending on how they
> > > > rate them.
> > > >
> > > > Hooking up a bridge rectifier across each coil, using a cordless drill,
> > > > I was able to get .5A short circuit and beyond 12v out of it open
> > > > circuit.  Using various loads, I think I was able to get as much as 12W
> > > > out of it.  It wasn't exhaustive, but I think that was somewhere near
> > > > the peak.  I may have been able to get more with a higher speed.
> > > >
> > > > One of the NEMA 23 motors is a Matsushita 1HHS-457CH 24V, 26ohm,
> > > > 1.8deg/step 6-wire unipolar.  Didn't find anything on it either.  Again
> > > > my guess is 48 or maybe 96W.
> > > >
> > > > Short: 0.16A, Open: 170V  Most I was able to get was about 8 Watts out
> > > > of it.
> > > >
> > > > These motors look pretty underpowered compared with some of the specs
> > > > I've seen on the net...  This isn't surprising since I think these are
> > > > 20 years old.
> > > >
> > > > Darcy, do you have any part numbers or specs for your steppers?
> > > >
> > > > >       slainte mhath, RGB
> > > >
> > > >        slainte mhath, RGB
> >
> >        slainte mhath, RGB

	slainte mhath, RGB

--
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