[Arm-netbook] libre laptop 3d print run 90% done

[Luke Kenneth Casson Leighton]

---
crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68


On Mon, Jan 18, 2016 at 8:24 PM, Troy Benjegerdes <hozer at hozed.org> wrote:
> On Mon, Jan 18, 2016 at 02:54:52AM +0000, Luke Kenneth Casson Leighton wrote:
>> ---
>> crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
>>
>>
>> On Mon, Jan 18, 2016 at 2:38 AM, Alexander .S.T. Ross
>> <maillist_arm-netbook at aross.me> wrote:
>> > Looking forward to seeing how this turns out.
>> >
>> > I’ve been considering having a go at printing it my self, at a hacker
>> > space... I see how you get on. For whats i be letting my self in for ;)
>>
>>  you'll need about... 10 metres of ABS @ 3.0mm and about 15 metres of
>> PLAY @ 3.0mm.  if using 1.75mm adjust accordingly.
>>
>
> What would you need to make it entirely out of PLA?

 high-temperature PLA, such as this:
 http://www.proto-pasta.com/pages/high-temp-pla

 the reason is, as i discovered by leaving the first prototype in
direct sunlight, that the standard temperature PLA will melt.  that
means a number of things:

 (1) the screen left and right edges bend
 (2) the screen hinge parts start to deform
 (3) the friction-hinge softens enough (it's under quite a lot of
pressure) so that it deforms and no longer does its job
 (4) the base back part, which has a circular tube that the friction
hinge is in, will crack.

 so there is a lot that goes wrong just by having the temperature
reach the glass point (60C) of standard temperature PLA.

 high-temperature PLA such as that made by proto-pasta is crystalline
and has a glass point around 85C.

> I would buy a truckload of PLA from the Ingeo plant in Nebraska if
> I can start making laptops from corn...

 cool!