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

[Gerry Murray]

Hi JP

You could maybe try a resolver. The resolution of them can be very high 
: up to 16 bit.
https://www.mouser.co.uk/applications/resolver-encoder-motor-control/
https://www.instructables.com/Arduino-Resolver-Module/

I always like it when you put an inquiry on the list because, usually 6 
months later on, a really cool project emerges. :-)

Best wishes

Gerry


On 11/12/2024 15:09, Jean-Pierre Desrochers via Synth-diy 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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