[sdiy] rack enclosures

[Andre Majorel]

On 2007-03-05 23:17 +0100, Hallvard Tangeraas wrote:
> On 5/3/07 21:39, Andre Majorel wrote:
>
> The lettering on commercially sold 19" rack module synths (Yamaha, 
> Roland, Korg etc.) is done by silk-screen printing, isn't it?

I think it's typically silk-screening on anodised aluminium.

> >It might not be strong enough for a very deep unit. Short and deep
> >units like 2U high, 60-cm deep servers are to be put in 19" racks
> >that have a second pair of rails in the back. Otherwise, the
> >torque would twist the front panel. And possibly the rails.
> >  
> You've definitely got a point there.
> So you're saying that there should be a 19" rack front panel on both 
> ends? That would mean that the 19" rack cabinet/shelf/flight-case or 
> whatever would have to have the exact depth of the distance between 
> these two panels.

No, the back rails are at 90° of the front rails, so the exact
distance from the front rails does not matter, as long as it does
not exceed the depth of the unit.

        ----------------
     _ |                | _
      ||                ||
      #|                |#  <--- Back rail
     _||                ||_
       |                |
       |                |
       |                |
       |                |
       |                |
       |                |
     | |                | |
   #_| |                | |_# <--- Front rail
   ----+----------------+----

(The #'s show where the rail nuts go (insert joke here)).

On the racks I've seen, the back rails were about 60 cm behind the
front rails. The unit is not screwed directly to the back rails.
On each side, a horizontal rail (given with the unit) is screwed
to the front and back rack rail. That's what supports the unit.
The thumb screws that you see at the front of the unit do not
support any weight ; they're just there to lock the unit in place.

You can think of it as a drawer.

The 19" racks you find in server rooms are different from the ones
you find in studios. They're around 80 cm deep.

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
Do not use this account for regular correspondence.
See the URL above for contact information.