[Cyborg] motor specs

Mike Ashmore motomike at gmail.com
Mon Mar 23 23:00:49 PDT 2009


... though it occurs to me now, we might find it better to drive the  
motors with the full 3V they're rated for, and vary the duty cycle  
over which we drive 'em. PWM-style. That seems like it should handle  
the "start from stuck" issue we were seeing at low voltages. Might  
also make the design more adaptable to different types of motors  
(single sources bad, or so I hear), say if we were to make an  
instructable.

Just a thought.
-Mike



On Mar 23, 2009, at 9:52 PM, Mikolaj Habryn wrote:

> I'll bring a VPM2 tomorrow to add to the list. Rather frustratingly, I
> can't find my bag of them, so have only a couple that were rattling
> around loose. Because I'm lazy, I'd rather use these than build a hard
> shell around a pager motor with an exposed eccentric, so I'm inclined
> to buy another 10 or 20 from solarbotics (at $3.50 each, sigh - if
> people have already worked out how to convert one of the other motors
> into a form that can be embedded between two layers of fabric, I'd
> love to be talked out of this).
>
> m.
>
> On Sun, Mar 22, 2009 at 4:13 PM, Rachel McConnell  
> <rachel at xtreme.com> wrote:
>> Mike and I just spent some time testing out the specs for the 3  
>> kinds of
>> pager motors we currently have.  Here's a Google spreadsheet of the  
>> data
>> we got:
>>
>> http://spreadsheets.google.com/ccc?key=p--xq5BkJD5E_DTRwEdLcEA&hl=en
>>
>> There's a really nice power supply up here in the electronics lab  
>> that
>> we used to get these numbers.  Let's run each motor we get through it
>> just for comparison; it takes about 2 minutes per motor.
>>
>> I'll post this link plus pictures of the motors in question on the  
>> wiki
>> shortly.
>>
>> Rachel
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>>
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Mike Ashmore
motomike at gmail.com





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