Re: DC Motor Selection - Where to begin?

On Wed, 14 May 2008 20:52:26 -0700, Gadi wrote:

Greetings,
I am stepping into my first self designed, open ended project beyond the
ivory walls of school and the grey walls the cubicle, and I have
realized I don't know where to begin! If I have found the wrong forum
any redirection would be much appreciated.

I am looking to create, for all intents and purposes a low power haptic
device. I want to use a PWM controlled DC motor powered from a
rechargeable battery to create a wide range of vibrations to indicate
information to the user. From this I think I need a motor that has the
following features:

1) Relatively small profile
2) Powerful enough to create a wide range of vibrations, even very
intense ones
3) High quality, long life, no cheap motors! 4) DC, Single direction is
fine
5) As low a power consumption as possible

My issue is I don't know how to go from my list of specifications to a
concerted motor search. Any help would be appreciated, from specific
recommendations to (perhaps the more helpful over time) help with
resources to learn how to conduct this kind of search on my own.

Thanks for much for your help!

-Gadi

Item 3 points you to Maxon, Faulhauber or Pittmon -- unfortunately the
'not cheap' applies to the cost as well.

If you find those prices too high, Johnson and Mabuchi are the big
Japanese motor suppliers, and may have something good enough yet
affordable.

For experimenting check the surplus houses -- they all seem to have lots
of motors, and many have pager motors with weights already attached.

--
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html
.

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