Post by thread:Need sources: Sub-Miniature motors

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_OUTNAMIKIPATakeThisOuTMCIMAIL.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 <.....PICLISTKILLspam@spam@MITVMA.MIT.EDU> >From: Craig Webb <lucidKILLspamMAGNET.CA> >Subject: Need sources: Sub-Miniature motors >To: .....PICLISTKILLspam.....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 > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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

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

>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}>At 15:22 1998-01-25 -0500, you 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 >> >> > >Morgan Olsson, MORGANS REGLERTEKNIK, Sweden, ph: +46 (0)414 70741; fax 70331 >============================================================================ > >

>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.

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.

> 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_OUTTakeThisOuTinterport.net http://www.interport.net/~carlott/ -------------------------------------------------------- Any sufficiently advanced technology is indistinguishable from a rigged demo.

>>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

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.

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 <PICLISTspam_OUTMITVMA.MIT.EDU> {Quote hidden}>From: Craig Webb <@spam@lucidKILLspamMAGNET.CA> >Subject: Re: Need sources: Sub-Miniature motors >To: KILLspamPICLISTKILLspamMITVMA.MIT.EDU > >>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 {Quote hidden}>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. > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

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