[sdiy] Incremental encoder to up / down counter or pots and an ADC

Vladimir Pantelic vladoman at gmail.com
Tue Nov 29 21:53:22 CET 2016


but that's twice as much as the pots! :)

On 29.11.2016 21:20, Matthias Herrmann wrote:
> Anybody used axle bushings like these? they should keep some stress from the
> encoder:
> http://www.reichelt.de/Potiknoepfe/P6-SCREW-ACHSE/3/index.html?ACTION=3&LA=2&ARTICLE=42129&GROUPID=3139&artnr=P6+SCREW+ACHSE&SEARCH=%252A
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> *Von:*Synth-diy [mailto:synth-diy-bounces at synth-diy.org] *Im Auftrag von
> *Jean-Pierre Desrochers
> *Gesendet:* Dienstag, 29. November 2016 21:00
> *An:* Tom Wiltshire
> *Cc:* synth-diy at synth-diy.org
> *Betreff:* Re: [sdiy] Incremental encoder to up / down counter or pots and an ADC
>
>
>
> Hi Tom,
>
>> A non-threaded shaft is never going to be tight in the first place, is it?
>
>> _As long as the hole that that the encoder goes through is a nice tight fit_..
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> That's exactly the problem with MANY cheapo mixers that have too large holes
>
> for the pot's shaft and these shafts are rocked in all the way
>
> with no secure mecanical provision.. Even with a brand new console
>
> you can 'feel' the loose the shafts have in their non supporting holes.
>
> Sometimes companies like Fender (to name one) use small plastic
>
> washers to fill the holes circular gaps for tightening the shafts in place.
>
> These pots or encoders are too often used with too much of their shaft
>
> going outside the metal front panel causing the premature mecanical
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> degradation. Try to imagine.. when you need to pull their knobs for repair
>
> you fear of ripping these shaft out of the device..
>
>
> JP
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>
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> Le 2016-11-29 14:09, Tom Wiltshire a écrit :
>
>     +1 agree. This is a classic microcontroller job.
>
>
>
>     JP, what do you mean that these non-threaded shafts "get loose over time"? A non-threaded shaft is never going to be tight in the first place, is it? As long as the hole that that the encoder goes through is a nice tight fit, I don't see a particular problem (assuming the PCB is well supported). So what am I missing?
>
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>     Thanks,
>
>     Tom
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