[TriEmbed] Need a simple actuator

Bothari bothari at gmail.com
Thu Aug 14 20:24:01 CDT 2014


I'm thinking it will be in the soccer-to- football size, and not much
smarter than it takes to keep bouncing.  Less than a pound or so.

After thinking about it, I like the idea of a rotary motion that translates
into linear motion.  I was trying to picture an actuator with the motor to
one side, which would make it tough to balance.  But your description made
me realize there's no reason it couldn't be directly over the center, which
would make it easier to keep in sync.

Solenoid was the word that I was thinking of, but couldn't remember.

Thanks, guys!
Joe


On Thu, Aug 14, 2014 at 6:24 PM, Jon Wolfe <jonjwolfe at anibit.com> wrote:

> You ought to be able to find generic solenoids for a decent price too.
> That would be phyically simpler and faster, but I believe solenoids have a
> lot of inductance  and high current that might require extra care in the
> electronic side.
>
> Electronics Goldmine used to have some cheap solenoids, they might still.
>
>
> -------- Original message --------
> From: Jeff Highsmith
> Date:08/14/2014 5:45 PM (GMT-05:00)
> To: Bothari
> Cc: triembed at triembed.org
> Subject: Re: [TriEmbed] Need a simple actuator
>
> Joe,
>
> About how big will the 'bot be?
>
> You might consider converting the rotary motion of a motor into a linear
> motion using a crankshaft or similar linkage. Like a car's engine in
> reverse, with the crankshaft spinning but the pistons going up and down.
> Depending on your desired hopping rate, it might be possible to store the
> energy of a single rotation in a rubber band or torsion rod, using a cam,
> notch or catch to release it at the end of each rotation.
>
> Jeff :)
>
>
> > On Aug 14, 2014, at 16:20, Bothari <bothari at gmail.com> wrote:
> >
> > Group,
> >
> > I'm interested in learning more about hardware.  We use servos to move
> things in a circle, but what about linearly?  I'd like to make a hopper
> that bounces instead of rolls.  Googling shows electronic door locks are
> about what I'm thinking of, at 10 times the price.
> >
> > Is there something else that is inexpensive, but electronically
> activated for a hopping motion?
> >
> > Thx,
> > Joe
> > --
> > "There are only two industries that refer to their customers as
> ‘users’." - Edward Tufte
> >
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-- 
"There are only two industries that refer to their customers as ‘users’." -
Edward Tufte
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