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<div class="moz-cite-prefix">On 08/14/2014 04:20 PM, Bothari wrote:<br>
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cite="mid:CAMH6TZ7JVFMCTZ_7B8cXMG0yaoPh81aGrX-Z7q3bp_JrEgo3pw@mail.gmail.com"
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<div dir="ltr">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.<br clear="all">
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<div>Is there something else that is inexpensive, but
electronically activated for a hopping motion?</div>
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I would use a standard motor with a shaft that has a cam or two on
it. As the shaft turns, the cams move the hopper up and down. I
built something like this as a kid with my Erector set to create a
vibrating powered sifter (a hopper with a screen bottom -- yes
absconded from the kitchen). Looking back on it now I would have
done better to include a more circular motion as well like how you
handle a sifter by hand. But in your case, the vibrating
up-and-down motion sounds like what you want.<br>
<pre class="moz-signature" cols="80">--
Scott G. Hall
Raleigh, NC, USA
<a class="moz-txt-link-abbreviated" href="mailto:ScottGHall1@GMail.Com">ScottGHall1@GMail.Com</a>
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