[sdiy] Looking for a mini rotary encoder with very low torque (servo type)

[Jean-Pierre Desrochers]

The surface I'm reading the moving speed of is paper.

Yes, a mouse optical sensor could be Ok.
I will have to find a way to read the actual X-Y 'steps' on the inner micro though..
Just want one of these.
But I don't want to get into the USB protocol to find these X-Y values..
Your suggestion is very promissing..
Thanks.

> -----Message d'origine-----
> De : Ben Stuyts <ben at stuyts.nl>
> Envoyé : 11 décembre 2024 10:30
> À : Jean-Pierre Desrochers <jpdesroc at oricom.ca>
> Cc : synth-diy at synth-diy.org
> Objet : Re: [sdiy] Looking for a mini rotary encoder with very low torque (servo
> type)
> 
> I can’t help you with the encoder, but just an idea: can’t you use the sensor of
> an optical mouse? -> zero torque. Something like an ADNS-3050 although that
> one is obsolete now.
> 
> Ben
> 
> 
> > On 11 Dec 2024, at 16:09, Jean-Pierre Desrochers via Synth-diy <synth-
> diy at synth-diy.org> wrote:
> >
> > I'm looking for a very small (20mm or less body diameter) rotary
> > encoder with very low torque (servo type).
> > The low torque shaft is needed because it will turn by means of a
> > small wheel with rubber sides that will be put against a moving surface, turn
> and 'follow'
> > the moving surface.. no slipping allowed !
> >
> > The precision of steps/turn is not important.
> > But the higher will be best..
> >
> > I was thinking of using a dismantled PC mouse (rubber ball type) and
> > use one of the two  X/Y optical rotary encoders, but these PC mice
> > nowadays are hard to find.. So.
> >
> > I checked Digikey and Mouser but they have encoder too big for my
> > uses..
> > The smaller I found has 20mm in diameter..
> > https://www.digikey.ca/en/products/detail/nidec-components-corporation
> > /RES20D-50-201-1/6469509
> >
> > Any suggestions ?
> >
> >
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