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

[Matthias Herrmann]

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

 

 

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..





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
degradation. Try to imagine.. when you need to pull their knobs for repair
you fear of ripping these shaft out of the device..


JP

 

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?
 
Thanks,
Tom
 
 

 
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