[TriEmbed] Need a simple actuator

[Collin Ladd]

I have some extra medium duty 12v solenoids from electronics goldmine if
you wanted to try one out and see if it serves your purpose well without
having to order one. I will be gone through tuesday, but I will leave them
in the office at ncsu.
On Aug 14, 2014 9:24 PM, "Bothari" <bothari at gmail.com> wrote:

> 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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>>
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>
>
>
> --
> "There are only two industries that refer to their customers as ‘users’."
> - Edward Tufte
>
>
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