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PICList Thread
'Need sources: Sub-Miniature motors'
1998\01\25@151700 by Craig Webb

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face
Does anyone have leads to very small, inexpensive motors, both ultrasonic
ones (like the one in Seiko's new "Ultrasonic" watch) and regular magnetic
ones. I'm looking for something like a cheap pager motor, small and weighted
to produce vibration.

Thanks all.

C. Webb

1998\01\25@162529 by Charles Laforge

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Hi Craig

Probably the cheapest place to get pager motors is
http://solarbotics.com.  They have steppers there for $10 CND in
quantity 1.  The cheapest I've seen so far.  Here are more places that
make these motors but I did contact one place which said the minimum
quantity was 50 motors and that at $15 US each.

Here are those links:

http://www.micromo.com

http://www.hankscraft-motors.com/oem-main.html

Robert Wassmer <ROBERT%spam_OUTNAMIKIPATakeThisOuTspamMCIMAIL.COM>  (North American contact
for Namiki motors)

http://www.dmicrotek.com/  (I don't know about pager motors but they
have beautiful stepper motors)

Good luck.

Charles



>Date:         Sun, 25 Jan 1998 15:22:14 -0500
>Reply-To:     pic microcontroller discussion list
<.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
>From:         Craig Webb <lucidspamKILLspamMAGNET.CA>
>Subject:      Need sources: Sub-Miniature motors
>To:           .....PICLISTKILLspamspam.....MITVMA.MIT.EDU
>
>Does anyone have leads to very small, inexpensive motors, both
ultrasonic
>ones (like the one in Seiko's new "Ultrasonic" watch) and regular
magnetic
>ones. I'm looking for something like a cheap pager motor, small and
weighted
>to produce vibration.
>
>Thanks all.
>
>C. Webb
>


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1998\01\25@170212 by Morgan Olsson

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Try Japan Servo, Sony, Mitshubishi etc.
But i think maybe they only make expemsive ones.
Mabuchi make a lot of inexpensive motors for toys and hobby.
The cheapest is probably a motor designed-in into the chassis of the pager,
like a motor in a drilling machine. But that requires high production
volume...

Maybe a cheap vibrator can me made with a coil and a permanent magnet: The
magnet monted on a spring plate so it swings without friction and noise,
and driving the coil with resonant frequency? *very* cheap at high volume,
but time, consuming to build in small production?

At 15:22 1998-01-25 -0500, you wrote:
{Quote hidden}

Morgan Olsson, MORGANS REGLERTEKNIK, Sweden, ph: +46 (0)414 70741; fax 70331
============================================================================

1998\01\25@174354 by Joel A. Kunze

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Several months ago (maybe a year) I bought a few pager motors directly
from Motorola's spare part group/dept. I don't have a number or contact
info available right now. The motors are DC brush type, they are about
as big around as a AAA battery and half as long. I think they were about
$15 a piece.

I will try to post the part number and a phone number later.

Joel A. Kunze


Craig Webb wrote:
>
> Does anyone have leads to very small, inexpensive motors, both ultrasonic
> ones (like the one in Seiko's new "Ultrasonic" watch) and regular magnetic
> ones. I'm looking for something like a cheap pager motor, small and weighted
> to produce vibration.
>
> Thanks all.
>
> C. Webb

1998\01\26@143741 by Craig Webb
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>Maybe a cheap vibrator can me made with a coil and a permanent magnet: The
>magnet monted on a spring plate so it swings without friction and noise,
>and driving the coil with resonant frequency? *very* cheap at high volume,
>but time, consuming to build in small production?

Yes, this sounds like it might work, but I'm not looking to design the
thing. Does anyone know of sources for such?

C. Webb

{Quote hidden}

1998\01\26@143746 by Craig Webb

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>Probably the cheapest place to get pager motors is
>http://solarbotics.com.  They have steppers there for $10 CND in
>quantity 1.  The cheapest I've seen so far.  Here are more places that
>make these motors but I did contact one place which said the minimum
>quantity was 50 motors and that at $15 US each.

Thanks for the response Charles. I'm looking for something smaller (no
steppers) and cheaper (<$5). Or maybe there's some solenoid that will do the
vibration trick???

C. Webb

>>Does anyone have leads to very small, inexpensive motors, both
>ultrasonic
>>ones (like the one in Seiko's new "Ultrasonic" watch) and regular
>magnetic
>>ones. I'm looking for something like a cheap pager motor, small and
>weighted
>>to produce vibration.

1998\01\26@145740 by Conor O'Rourke

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Craig Webb said:

> >Maybe a cheap vibrator can me made with a coil and a permanent magnet: The
> >magnet monted on a spring plate so it swings without friction and noise,
> >and driving the coil with resonant frequency? *very* cheap at high volume,
> >but time, consuming to build in small production?

> Yes, this sounds like it might work, but I'm not looking to design the
> thing. Does anyone know of sources for such?

Yeah, an Adult store. Although they definately aren't $5.

I'm really sorry. I just couldn't resist :-)

Conor.

1998\01\26@151539 by carlott

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> Does anyone have leads to very small, inexpensive motors, both ultrasonic
> ones (like the one in Seiko's new "Ultrasonic" watch) and regular magnetic
> ones. I'm looking for something like a cheap pager motor, small and weighted
> to produce vibration.
>

       For small quantities of pager motors,  try the following:

       http://www.starpluscomm.com/spci03.htm

       I think you can get them in the $3.00 (US) range. They might
however be pulls.

hope this helps.....


carl

--------------------------------------------------------
Henry Carl Ott   N2RVQ    EraseMEcarlottspam_OUTspamTakeThisOuTinterport.net
http://www.interport.net/~carlott/
--------------------------------------------------------
Any sufficiently advanced technology is
indistinguishable from a rigged demo.

1998\01\26@171655 by Reginald Neale

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>>Maybe a cheap vibrator can me made with a coil and a permanent magnet: The
>>magnet monted on a spring plate so it swings without friction and noise,
>>and driving the coil with resonant frequency? *very* cheap at high volume,
>>but time, consuming to build in small production?
>
>Yes, this sounds like it might work, but I'm not looking to design the
>thing. Does anyone know of sources for such?
>
>C. Webb


The description fits the Star Micronics buzzers, series YMB et al. But they
draw dozens of mils, too much to drive with a PIC output directly.

Reg Neale

1998\01\26@182725 by Morgan Olsson

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At 17:18 1998-01-26 -0500, you wrote:
>>>Maybe a cheap vibrator can me made with a coil and a permanent magnet: The
>>>magnet monted on a spring plate so it swings without friction and noise,
>>>and driving the coil with resonant frequency? *very* cheap at high volume,
>>>but time, consuming to build in small production?
>>
>>Yes, this sounds like it might work, but I'm not looking to design the
>>thing. Does anyone know of sources for such?
>>
>>C. Webb
>
>
>The description fits the Star Micronics buzzers, series YMB et al. But they
>draw dozens of mils, too much to drive with a PIC output directly.
>
>Reg Neale
>
Yes, some kind of power stage must be needed in any case. There are a lot
to choose from. To optimize the drive for most output to least input power,
an H-bridge drive is the best. (When one end of the winding is to + the
other is to - ,and the shifting) To reduce a lot of power, but only a
little output, insert pauses in the shift: ++0--0++0-- and so on.
/Morgan O.

1998\01\26@192320 by Charles Laforge

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OOPS!

I appologize, it looks like I read the message too fast.  I see others
have done the same... kinda makes me feel a little better.  :)

Charles

>Date:         Mon, 26 Jan 1998 14:43:13 -0500
>Reply-To:     pic microcontroller discussion list
<PICLISTspamspam_OUTMITVMA.MIT.EDU>
{Quote hidden}

do the
{Quote hidden}

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1998\01\27@045433 by Morgan Olsson

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At 00:19 1998-01-27 +0100, you wrote:
{Quote hidden}

I want to add to the above, that the resonance frequency will vary
depending on  the ambient where the vibrator is used; if the pocket is
stiff or soft. (Beware also manufacturing variation, and the PIC osc will
vary too)

The optimum drive is to have the coil with two windings; one little sense
winding which is used for feedback. The function of the drive electronics
should be like that for driving a crystal; the vibrator will be driven at
it«s resonance frequency.

Maybe you have to limit the amplitude to avoid mechanical damage; when the
vibrator is laying on a table the mechanical output power is zero, so it
will swing with much higher amplitude than in a pocket.
Morgan Olsson, MORGANS REGLERTEKNIK, Sweden, ph: +46 (0)414 70741; fax 70331
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