[sdiy] Multi-voice architecture without CV parameters: mechanical replication of settings?

[cheater cheater]

Hi Tom,
that's pretty cool.

> I'd be worried about the pot at the near end to the
> knob turning more than the far one, though.

Hmm yeah, but I think a good rigid material such as aluminium or steel
could work (why should they really have to be non-conductive btw?)

> Possibly better to use a
> slider, mounted perpendicular to the rod axis, pushing and pulling on a
> harness that twists the rod from both ends -- and possibly the midpoint
> as well.  Not too complicated to build, mechanically, I'd think.

I'm having a problem visualizing this

Do you know the model of the potentiometers you've seen?

Thanks a lot
D.

On Sat, Apr 3, 2010 at 16:22, Tom Ivar Helbekkmo <tih at hamartun.priv.no> wrote:
> cheater cheater <cheater00 at gmail.com> writes:
>
>> Another way would be to make your own multi-gang potentiometers. I
>> guess in a typical potentiometer the shaft could go through a hole in
>> the resistive element and out the back. I guess you could make such
>> potentiometers without a shaft, but with a keyed hole for receiving
>> the shaft; then you could take one long shaft and just line up as many
>> potentiometers on it as you wanted. Sound like a good idea? I wonder
>> if any currently existing potentiometers could be modified for that.
>
> I have seen pots like this, made for mounting vertically on a PCB, and
> with an X-shaped hole in the middle for turning the slider (with a
> plastic screwdriver).  I've always assumed that this is what's inside a
> normal pot for control panel mounting.  A number of these behind each
> other on a PCB, with a stiff, non-conductive rod running through them,
> might do the trick.  I'd be worried about the pot at the near end to the
> knob turning more than the far one, though.  Possibly better to use a
> slider, mounted perpendicular to the rod axis, pushing and pulling on a
> harness that twists the rod from both ends -- and possibly the midpoint
> as well.  Not too complicated to build, mechanically, I'd think.
>
> -tih
> --
> Self documenting code isn't. User application constraints don't. --Ed Prochak
>