[OpenTRV-dev] 3D OpenTRV case design

[Bo Herrmannsen]

yea.... i would have used some kind of grease....

regarding oil remember to use what we in DK call acid free oil... mostly 
used for sewing machines etc...

for threaded rod i would use the grease as it tends to stick to the moving 
parts and does not run off etc

but yes.. also calibration is one area you should spend time on... the more 
precise you can get the better.... and if your eyes are playing tricks ask 
jean or one of the oldest ones for help :-D



-----Oprindelig meddelelse----- 
From: Damon Hart-Davis
Sent: Saturday, October 12, 2013 6:00 PM
To: Bo Herrmannsen
Cc: Damon Hart-Davis ; Closed list for developer discussions
Subject: Re: 3D OpenTRV case design

Hi,

It has survived about 1h so far on this current spacer-collar print.  There 
are moments when I think it might fail, but maybe even my getting 
calibration better and adding a little oil may have helped.

Pics to follow soon!

Rgds

Damon


On 12 Oct 2013, at 16:48, Bo Herrmannsen wrote:

> btw.... did you figure why maplin printer is unstable?
>
> -----Oprindelig meddelelse----- From: Damon Hart-Davis
> Sent: Saturday, October 12, 2013 5:23 PM
> To: Closed list for developer discussions
> Cc: Damon Hart-Davis
> Subject: 3D OpenTRV case design
>
> Hi,
>
> Bruno came round today and we worked on the case design: initially 
> something for DD1 given that I want to have some eye-candy this coming 
> Friday for the Dynamic Demand Challenge Hackathon, but actually to think 
> about a standardised OpenTRV design.
>
> Given the work that Bo has done to make the OpenTRV REV1 board match the 
> footprint of the DD1 board, the aim is that what we have done today should 
> cover a whole family of OpenTRV (and DD1) boards with a standardised base 
> and lid and only a collar above and below the board needing adjustment for 
> each board revision for positioning of connector cutouts and so on.
>
> Basic layered design from top might be:
>
> 1) Lid with holes for buttons, sensors, etc.
> 2) Spacer collar (~3cm).
> 3) Thin upper collar for cutouts above the PCB.
> 4) Base and under-collar for cutouts below the PCB.  Includes screw slots 
> for wall mounting if desired.  This could be two layers.
>
> Collars/cutouts can be selected by board revision, eg V0.2-REV1 would 
> flick various switches to customise the basic design in OpenSCAD and then 
> the STL goes to the 3D printing process as usual.
>
> (I think that much of this should be immediately convertible to 
> injection-moulding were we to want to go beyond a run of say 100, eg top 
> two layers as one half and bottom two as the other.)
>
> I'll post a link when I've put up the STL, SCAD and some photos; just 
> letting the spacer collar print run at the moment...
>
> Also, given constraints of our thinking and printing time, etc, I propose 
> that we have this housing enclose only the OpenTRV (/DD1) board itself, 
> with separate battery packs for the first run, on flying leads, and 
> containment for the SSR for boiler control units.  Bruno suggests that we 
> could make these mechanically mate in some way, though be separate items.
>
> Possibly Bo could do the SSR containment boxes separately via his 
> mechanism and send them to me: we'll only need a small number and it would 
> be good to make use of the time he has already put in on that side.
>
> Rgds
>
> Damon