[sdiy] PCB size for euro-rack format

[Julian]

Seb,

All the euro modules ive seen support the pcb by the pannel components.  In the case of smaller boards, this is somtimes just cliff 
sockets, but larger with alpha pots, and pot 'brackets'

Ive actually never seen any dedicated brackets on any euro module (except the pot brackets just mentioned)

Julian

----- Original Message ----- 
From: "Seb Francis" <seb at burnit.co.uk>
To: "Synth DIY" <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, November 29, 2008 10:09 AM
Subject: Re: [sdiy] PCB size for euro-rack format


Hi,

Thanks for the helpful replies about this (and ignoring the troll ;)

I will make the PCB 100mm x <160mm then.  Should be no problem to get <
160mm - a quick try last night with the auto-placer on a 105x120mm board
fitted all the components with lots of space to spare (the joys of SMD!)

Presumably mounting hole positioning is not critical as a bracket can be
made up as necessary.  Or are there standards for this kind of thing?  I
plan to have 6x M3 mounting holes - 1 in each corner, and a further 2 on
the long edges, 40mm down from the panel end.  So the panel could be
mounted either 'deep' or 'wide' using the appropriate 4 holes.


By the way, regarding this comment of Laurie's:
>
>
> PS when referring to panel space I am actually referring to the space
> on the back of the panel where the components will be mounted. Items
> such as pots require more panel space than switches and a pot cannot
> extend in to the rail area or beyond the edge of the panel. In
> principle, Frackrack and eurorack have almost the same amount of
> `printable' panel space on the front but differing `working' space
> behind.


Not quite the same 'printable' panel space - the Doepfer docs say their
front panels are actually 128.5mm high as they fit within a rim of the
mounting rails.  The Blacet modules I have here have panels exactly 3U
(133.4mm) high.

Seb



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