[Arm-netbook] EOMA68 Computing Devices Update: 500 Micro Desktop PCB Assemblies

[Richard Wilbur]

> On Mar 27, 2019, at 06:21, Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
> 
>> On Tue, Mar 26, 2019 at 11:52 PM David Niklas <doark at mail.com> wrote:
>> 
>> On Sat, 23 Mar 2019 16:56:25 +0000
>> Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:
>> <snip>
>>> 
>>> not a snowball in hell's chance.  resin is too brittle, 3D printing
>>> is far too inaccurate, and the plastic is extremely thin.  5 years ago
>>> the ones we had stamped out for prototypes (laser-cutting i believe)
>>> broke almost immediately.
>>> 
>> 
>> What material did you laser cut? I would have thought that laser cut
>> aluminum would be perfect.
> 
> ten prototypes of the mass-produced PCMCIA plastic surround from
> Litkconn had holes laser-cut to make space for the micro-sd,
> micro-hdmi and USB-OTG ports.
> 
> the result was plastic under 1mm deep that had only around 0.5mm
> height below e.g. the micro-sd card and it of course snapped
> immediately.

Sounds like a more flexible plastic is needed but that clearly impacts the manufacturing processes available and thus the cost.

> as a result we considered very thin metal sheet (thick foil in
> effect) that could be stamped (or laser cut) and was effectively a
> "metal sticker" that could go over the end and be bent round.
> probably even by hand.

Did you try the foil?  How well did it work?