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

Ullrich Peter Peter.Ullrich at kapsch.net
Tue Nov 29 23:52:45 CET 2016


Hi Roman!

If you want to machine a prototype then a drawing would be helpful...
You can find it here:
http://www.mentor-bauelemente.de/produktpdf/?katalog=k&pdf=26.pdf&id=1045

Ciao
Peter

http://www.ullrich.at.tt


________________________________
Von: Synth-diy [synth-diy-bounces at synth-diy.org]" im Auftrag von "Roman [modular at go2.pl]
Gesendet: Dienstag, 29. November 2016 22:17
An: Matthias Herrmann
Cc: synth-diy at synth-diy.org
Betreff: [sdiy] Odp: Re: Incremental encoder to up / down counter or pots and an ADC

That's what I've been looking for! Thank you!
I was almost ready to machine those myself...
Although I'd rather have one for 1/8'' shaft or 4mm, have you seen them anywhere?

Roman

Dnia 29 listopada 2016 21:24 Matthias Herrmann <matthias.herrmann at fonik.de> napisał(a):

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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