[sdiy] PCB size for euro-rack format

[Laurie Biddulph]

Basically confirming what I said earlier. I would still make the maximum 
height be 100mm giving total universal fitting in to ANY 3U Eurorack i.e. 
even those that use card guides.

The depth is a bummer thing. 85mm is definitely the initial maximum length 
to maintain that overall universitality (!) but that will seriously 
compromise some of the more complex designs out there. The slightly longer 
length of 105mm is more useable and is probably worth adopting and will just 
mean that small area in Doepfer units will be reserved for other modules. Of 
course, Seb should be aiming for the shortest length he can get for each 
individual design to help reduce the cost.

I have a `generic' board outline which I start off with when doing my 
Panther modules and, after placing the components on the board, simply move 
the `length' edge as close to the front as the component layout will allow. 
That way I know my boards will fit consistently in the space I have planned.

The 3U and 6U racks I sell are 160mm deep so will take the standard 
Euroboard of 160mm (just) but I still keep the modules as shallow as 
possible even if that means a module has to have more than 1 main board

Best Regards

(Mr) Laurie Biddulph
Phone: +61 (0)2 4340 0938
Mobile: 0400 257 645

Elby Designs
ABN: 70 022 727 605
http://www.elby-designs.com

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----- Original Message ----- 
From: "Cary Roberts" <cary.roberts at retrosynth.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, November 30, 2008 9:01 AM
Subject: Re: [sdiy] PCB size for euro-rack format


> >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!)
>
> If you make the board that size it won't fit in a Doepfer and will
> barely fit in a Blacet rack.  As someone else stated the maximum depth
> of a Doepfer compatible module is 105mm.  It's limited to 85mm in depth
> if in front of the power supply.  Height of the board should not exceed
> 110mm for Doepfer, and cannot exceed 107mm for Blacet.
>
> That makes the lowest common denominator size 107mm tall and 105mm deep.
> This of course assumes the PCB is touching the rear of the front panel.
>
> The largest official MOTM PCBs I have are 109mm deep and 139mm tall.
> There is a few mm gap between the front panel and the PCB.
>
> Depending on the case Modcan/Cyndustries modules can be up to 140mm deep
> and not interfere with the power buss.
>
> There is some information at the following URL but it does not cover PCB
> dimensions:
>
> http://www.modularsynth.com/chart.html
>
>
> -Cary
>
>
>
>
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