[Arm-netbook] microdesktop casework as DXF files for laser-cutting

[Normand Chamberland]

Hello Luke,

On 2017-03-20 at 02:04, Luke Kenneth Casson Leighton wrote :
> the new USB connector is 6mm high
>
> the VGA connector and PJ-045 (DC jack) i believe are both 9mm
>
> the micro-sd card slot (on the bottom, other end) is 2mm
>
> the EOMA68 (PCMCIA) is 6mm.
Could you confirm that your microdesktop_prog2.scad file (used to 
generated microdesktop_model2.stl) is _not_ up-to-date with these 
dimensions? Taking measurements from Mark's FreeCAD file converted from 
your stl:

- USB connectors are 6.65mm high rather than 6
- PJ-045 (thin tall one at rear extreme left?) is 11mm high rather than 9
- VGA is 9mm
- microSD slot (at the front under the board I presume) is 1.8mm rather 
than 2

Mark, I imported the scad file directly into FreeCAD, import wasn't 
perfect but I fixed the issues, all shapes are separate primitive cubes 
that can be re-sized through their properties. I left the EOMA-68 card 
separate as a mesh to bring the file size down to <160KB.

https://drive.google.com/file/d/0B8EXnjMkh8zVNXFvRjA5Qm0tSlU/view?usp=sharing 
(apologies for the Google hosting...)

Edit --> Project info reports license as GPLv3 (it's saved into the 
document).

On the manufacturing side, I wonder if it may be a good idea to check 
the real thickness of the 3mm plywood boards. Due to manufacturing 
tolerances, materials provided in sheets are often thinner than their 
nominal thickness be it for plywood, plastics etc.

As for the screws, difficult to evaluate from a couple of pictures but 
they seem to be M3 socket head, black oxide, with hex nuts at the bottom 
(possibly 2 per screw) with some kind of either plastic or vinyl cap. 
Nickel plated screws would be better IMHO (considering the hex nuts are 
either nickel or zinc) and not prone to rust like black oxyde screws, 
but they might be difficult to source and more expensive.

Cheers,

Normand