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

[Ben Stuyts]

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 Something like an ADNS-3050 although that one is obsolete now.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 ?
> 
> 
> ________________________________________________________
> This is the Synth-diy mailing list
> Submit email to: Synth-diy at synth-diy.org
> View archive at: https://synth-diy.org/pipermail/synth-diy/
> Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org