[sdiy] Question how to improve rotary encoder feel

[Julian Schmidt]

I found 2 pics of the ION parts
http://studiorepair.com/gallery/Alesis/Ion/slides/Alesis_Ion_Potentiometer__STUDIOREPAIR_04032501_1510157530.JPG
http://studiorepair.com/gallery/Alesis/Ion/slides/Alesis_Ion_Panel_PCB__STUDIOREPAIR_04032501_1510087626.JPG

julian

Am 09.06.2017 um 13:17 schrieb Julian Schmidt:
> I'm all ears if you know a part number or source for affordable 
> endless pots.
> All I can find are expensive industrial ones in the >10€/piece range 
> and although being 360° endless rotation parts, the resistive taper 
> spans only 340°
> The Ion pots look more like the normal, cheap 1-2€ pots but my 
> research turned nothing up, yet.
>
> julian
>
> Am 09.06.2017 um 12:53 schrieb rburnett at richieburnett.co.uk:
>> You could look at using continuous rotation pots like the Alesis Ion 
>> supposedly uses.
>>
>> -Richie,
>>
>>
>>
>> On 2017-06-09 11:30, Julian Schmidt wrote:
>>> Hello All,
>>>
>>> I have a current idea that could vastly benefit from using encoders
>>> instead of pots.
>>> My only gripe is that I never had an encoder where I liked the feel.
>>> With the standard 24PPR encoders you have to make way too many turns
>>> to get to a higher value.
>>> Rotationspeed based value speedups made the feeling even worse on the
>>> machines I tried. Also a lot of people complain about encoders on
>>> synths for the same reason.
>>> Best solution so far is something like on the midibox or AN1X where
>>> you push the encoder for fine resolution.
>>>
>>> The only one people seem to like are the Nord ones with the LED rings.
>>> I never had a nord machine in my hands, but Forum research suggests
>>> that they somehow managed to line up the LED movement on the ring with
>>> the encoder travel. So if you turn the encoder half a rotation, the
>>> value LED is at half, too.
>>>
>>> Any idea how they've done this? looking up the specs it seems like
>>> they are using Bourns ECW1D-C24-SE0049L encoders
>>> (http://electro-music.com/forum/topic-50251.html).
>>> 49L is not specified in the datasheet, but my guess would be 48L =>
>>> 48PPR which would still be too little resolution to even bring a 7 bit
>>> value up to full range in one revolution.
>>> Is the front panel resolution just reduced and interpolated on the
>>> nords?
>>>
>>> So if anybody has some hints how to give an encoder a more
>>> potentiometer like feeling I'm all ears. Especially if we talk 12 bit
>>> instead of 7 bit parameter resolution.
>>>
>>> For practical reasons encoders would be great for layered UIs to share
>>> a set of controls between multiple LFOs or preset saving. LED rings
>>> are sexy as hell, too. But whenever I use encoders for something other
>>> than menu diving and editing settings I wish for a pot in my hands ;)
>>>
>>> Cheers,
>>> Julian
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>
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