[sdiy] Using a stepper motor as an data entry wheel

[Andre Majorel]

On 2006-09-13 10:30 -0700, John Speth wrote:

> A few years ago somebody on SDIY noted a web site that
> presented a DIY design for using a stepper motor as an
> input device for a data entry wheel.  I've since lost
> the link.

This one ?

| Date: Tue, 10 Sep 2002 17:18:19 -0700
| From: Tom Arnold <moscowxyzzy at sysabend.org>
| To: Seb Francis <napoliseb at is-uk.com>
| Subject: Re: [sdiy] Call for opinions: Walsh Module
| Message-ID: <20020910171819.B94198 at moo.sysabend.org>
|
| On Tue, Sep 10, 2002 at 10:38:48PM +0100, Seb Francis wrote:
| > Tim Ressel wrote:
| > 
| > > Ouch! I just looked at the prices of digital pots. Oy!
| > 
| > ALPS STEC16B 16mm rotary enoders 24 sine pulse per revolution
| > CPC 87p each for 5+ (SW01640 / SW01641 / SW01642 / SW01643)
| > 
| > Just get a PIC + Mux to read them and your away ...
|
| Try using a Stepper motor unstead.
| http://www.4qdtec.com/stpen.html
| http://members.iinet.net.au/~richardh/Rotenc.htm
|
| Very cheap, have to build some interface circuitry, but the 
| tactile feel is I think amazingly better.  I've been picking up
| surplus diskdrive ones for $1.

(The second URL is 404 now).

Another one :

| Date: Fri, 11 Jan 2002 13:00:44 -0800
| From: GothGeek Sysadmin <belgradexyzzy at sysabend.org>
| To: Sowa Roman <ankaraRoman.Sowa at upc.com.pl>
| Subject: Re: [sdiy] Rotary Encoder Question
| Message-ID: <20020111130043.G56961 at moo.sysabend.org>
|
| On Thu, Jan 10, 2002 at 03:24:44PM +0100, Sowa Roman wrote:
| > Many years searching for device able to produce more than
| > 40 pulses per rotation and not costing a fortune made me
| > give up on using them at all.
|
| I came to the same conclusion after noting that anything over about 16ppr
| cost $50+, until I found :
| http://members.iinet.net.au/~richardh/Rotenc.htm
|
| Sure, stepper motors are a little bulky, but the extra mass makes them
| feel *awesome* and 100ppr is easily achievable with cheap ( $3 ) surplus
| units that panel mount fine and fit 1/4" shaft knobs.
|
| Got my stepper motors from Herbach&Rademan for $2.95.  Really being able
| to give the old knob a good hard spin and have it zoom off like an old
| Tempest controller is nice.  This plus acceleration makes controlling
| 15bits of controller data total cake.  And you wont have to pull a
| Roland and add any wieght to the unit to make it feel like theres
| something inside the box...

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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