Searching Fader Knob

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

We are searching metallic fader knobs for a new mixing console design.
Do you know some knob manufacturer ?

Thanks and regards

Silvano

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

Silvano wrote:

> We are searching metallic fader knobs for a new mixing console design.
> Do you know some knob manufacturer ?

There's plenty who make plastic fader knobs.

Do you mean metal or 'metallic look' ? Neve had to have their own
extrusion made for *real* metal fader knobs.


Graham

 

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Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

Pooh Bear <rabbitsfriendsandrelations@hotmail.com> wrote:
>Silvano wrote:
>
>> We are searching metallic fader knobs for a new mixing console design.
>> Do you know some knob manufacturer ?
>
>There's plenty who make plastic fader knobs.
>
>Do you mean metal or 'metallic look' ? Neve had to have their own
>extrusion made for *real* metal fader knobs.

Kilo International in Provo, Utah do knobs and fader caps from anodized
aluminum. Reasonably priced, and they will do custom shapes in small
runs. They do most of the knobs on Collins avionics.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

We suppose to need metal knob because we need touch sensitive fader.
We haven't done experiment yet, but I suppose we need a conductive path
between man finger and the chip that does touch sense.
If you have some ideas, please let me know.

Many thanks and regards

Silvano

--


"Pooh Bear" <rabbitsfriendsandrelations@hotmail.com> ha scritto nel
messaggio news:414F39C2.FB21F39E@hotmail.com...
> Silvano wrote:
>
> > We are searching metallic fader knobs for a new mixing console design.
> > Do you know some knob manufacturer ?
>
> There's plenty who make plastic fader knobs.
>
> Do you mean metal or 'metallic look' ? Neve had to have their own
> extrusion made for *real* metal fader knobs.
>
>
> Graham
>

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

Silvano <test@diadix.it> wrote:
>We suppose to need metal knob because we need touch sensitive fader.
>We haven't done experiment yet, but I suppose we need a conductive path
>between man finger and the chip that does touch sense.
>If you have some ideas, please let me know.
>
>Many thanks and regards

I think the cheap "metal look" ones will work too. They are plastic with
a thin layer of chrome plating, but the plating should be conductive enough
to work a capacitive touch sense device.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

On Tue, 21 Sep 2004 08:32:02 GMT, "Silvano" <test@diadix.it> wrote:

>We suppose to need metal knob because we need touch sensitive fader.
>We haven't done experiment yet, but I suppose we need a conductive path
>between man finger and the chip that does touch sense.
>If you have some ideas, please let me know.

Does it need to respond to touch, or to first movement?

CubaseFAQ www.laurencepayne.co.uk/CubaseFAQ.htm
"Possibly the world's least impressive web site": George Perfect

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

The system does automation value punch-in (start overwriting automation
value) when the technician touch the knob.
It would be possible to compare the position of the knob with the previously
recorded value; if they are different, this means that some external force
(technician one's) is acting on the knob.
Suppose that the fader is flying; I need to oppose its running with force;
the system sense a difference between ideal and real position value and stop
the motor force and enter writing automation value.
But what about punch out ? How can I sense when the technician release the
knob to punch-out and glide to previously recorded value ?

Does somebody have technical experience with touch sense ?

Regards

Silvano



"Laurence Payne" <l@laurenceDELETEpayne.freeserve.co.uk> ha scritto nel
messaggio news:2ovvk05ormrlqsbptnjbrahspntnpc95b4@4ax.com...
> On Tue, 21 Sep 2004 08:32:02 GMT, "Silvano" <test@diadix.it> wrote:
>
> >We suppose to need metal knob because we need touch sensitive fader.
> >We haven't done experiment yet, but I suppose we need a conductive path
> >between man finger and the chip that does touch sense.
> >If you have some ideas, please let me know.
>
> Does it need to respond to touch, or to first movement?
>
> CubaseFAQ www.laurencepayne.co.uk/CubaseFAQ.htm
> "Possibly the world's least impressive web site": George Perfect

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

"Silvano" <test@diadix.it> wrote in message news:<qxU3d.369$H11.3523@twister1.libero.it>...
> The system does automation value punch-in (start overwriting automation
> value) when the technician touch the knob.
> It would be possible to compare the position of the knob with the previously
> recorded value; if they are different, this means that some external force
> (technician one's) is acting on the knob.
> Suppose that the fader is flying; I need to oppose its running with force;
> the system sense a difference between ideal and real position value and stop
> the motor force and enter writing automation value.
> But what about punch out ? How can I sense when the technician release the
> knob to punch-out and glide to previously recorded value ?
>
> Does somebody have technical experience with touch sense ?
>
> Regards
>
> Silvano
>
>

I think touch sense is based on changing capacitance in some way when
the knob is touched. To be honest, I can't remember.

The MXR Pitch Transposer uses this to select between presets. Some of
the old analog synths had touch keyboards. EMS and Buchla come to
mind.

Electronotes newsletter has some information on building touch
keyboards... both mechanical and electrical aspects. I think "Getting
Started in Electronics" book written by Forest Mims for Radio Shack
might have a circuit for a touch activated lamp.

Peter

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

In article <6GR3d.13955$zF3.400407@twister2.libero.it> test@diadix.it writes:

> We suppose to need metal knob because we need touch sensitive fader.
> We haven't done experiment yet, but I suppose we need a conductive path
> between man finger and the chip that does touch sense.

Check with a Penny & Giles distributor. Dale Manquen
(http/www.manquen.net) handles them in the US and would be a good
place to start if you can't find a distributor closer to you. He's
mentioned that he carries some metal fader knobs.

--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

Silvano wrote:

> We suppose to need metal knob because we need touch sensitive fader.
> We haven't done experiment yet, but I suppose we need a conductive path
> between man finger and the chip that does touch sense.

OK, I understand - that's why Neve used metal knobs too for Necam etc...

>
> If you have some ideas, please let me know.

You could use a metal plated plastic knob. I think there are some maufacturers
doing this.

In the UK the obvious suppliers are Re-An and Sifam.


Graham

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

Silvano wrote:

> The system does automation value punch-in (start overwriting automation
> value) when the technician touch the knob.
> It would be possible to compare the position of the knob with the previously
> recorded value; if they are different, this means that some external force
> (technician one's) is acting on the knob.
> Suppose that the fader is flying; I need to oppose its running with force;
> the system sense a difference between ideal and real position value and stop
> the motor force and enter writing automation value.
> But what about punch out ? How can I sense when the technician release the
> knob to punch-out and glide to previously recorded value ?
>
> Does somebody have technical experience with touch sense ?

A little bit - yes. I know the theory and have worked on touch sensitive faders
but never had to design one from scratch.


Graham

 

[Guest]

Archived from groups: rec.audio.pro,rec.audio.tech (More info?)

In rec.audio.pro,rec.audio.tech, On 21 Sep 2004 11:48:58 -0700,
thecatspjamas@aol.com (Peter B.) wrote:


>I think touch sense is based on changing capacitance in some way when
>the knob is touched. To be honest, I can't remember.

There's info and circuit diagrams with descriptions of touch-sense
circuitry somewhere on paia.com. In short, it uses standard CMOS 4000
series circuitry and a few caps, diodes and resistors to make an
oscillator in the 100kHz range, and sends that through a resistance to
the touch pad to sense the increase in capacitance when a finger
connected to a human body (about 100pF) touches it. There are probably
a couple of variations on how it's done.

>The MXR Pitch Transposer uses this to select between presets. Some of
>the old analog synths had touch keyboards. EMS and Buchla come to
>mind.

Touch-sense must have been the "in" thing at the time...

>Electronotes newsletter has some information on building touch
>keyboards... both mechanical and electrical aspects. I think "Getting
>Started in Electronics" book written by Forest Mims for Radio Shack
>might have a circuit for a touch activated lamp.
>
>Peter

-----
http/mindspring.com/~benbradley