[Swansea Hackspace] Diamond RGB Hotend

[Justin Mitchell]

Yeah the kickstarter blurb seems quite clear on it just being a single
nozzled multi-extruder, not any kind of full-colour attempt.

There is an interesting report on the problems of trying to make a full
colour extruder on the reprap website, istr the conclusion was that you
need some kind of active stirrer in there to get any kind of uniformity.
http://reprap.org/wiki/Mixer_extruder

Also three colours of filament would not give you a very good range of
colours. its a subtractive process like paint and you would need to at
least also have a white filament.

Curiously apple have just filed for a patent on a full colour 3d
printer, their design uses one nozzle for the plastic, and a separate
'colouring' nozzle. how thats meant to work is anyones guess.




On Fri, 2015-12-04 at 10:20 +0000, Gerrit Niezen wrote:
> Sorry guys, I tend to disagree. In none of the prints shown are there
> more than three colours used. I have difficulty imagining how filament
> can be mixed to produce accurate colours. Even in their Kickstarter
> campaign, they call it “multi-color” printing. I’ll be happy to be
> proved wrong though! ;)
> 
> 
> The “mixing chamber” is specifically called “small" so that it can
> switch quickly from one colour to another:
> https://www.kickstarter.com/projects/wr3d/the-diamond-hotend-single-nozzle-multi-color-3d-pr/description
> 
> > On 4 Dec 2015, at 10:05, Richard Morgan
> > <richard.morgan at avocation.co.uk> wrote:
> > 
> > Yes, it does print in full colour - it will mix the filament from
> > three reels so you could do 10% Red, 50% Blue and 20% Green etc....
> > 
> > 
> > Not sure how you G-code it to feed the filament though using Slic3r
> > and if there's more RAMPS wiring needed....
> > 
> > 
> > P.S. Emyr - you're such a hoot ;-)
> > 
> > On 4 December 2015 at 09:54, Gerrit Niezen <gerrit.niezen at gmail.com>
> > wrote:
> >         For a moment I thought “RGB full colour” meant it mixes and
> >         actually prints in full colour, but on closer inspection it
> >         looks like you can just print in three colours at once?
> >         
> >         > On 4 Dec 2015, at 09:41, Richard Morgan
> >         > <richard.morgan at avocation.co.uk> wrote:
> >         > 
> >         > 
> >         > Anyone got any views or experience with the RGB full
> >         > colour hotend?
> >         > 
> >         > 
> >         > http://reprap.org/wiki/Diamond_Hotend
> >         > 
> >         > 
> >         > Christmas is coming and I was wondering if it's any
> >         > good...
> >         > 
> >         > 
> >         > Cheers,
> >         > 
> >         > Richard
> >         > _______________________________________________
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> >         > Hackspace at swansea.hackspace.org.uk
> >         > http://swansea.hackspace.org.uk/mailman/listinfo/hackspace
> >         > 
> >         
> >         
> >         
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> >         
> > 
> > 
> > 
> > 
> > -- 
> > Kind regards,
> > 
> > Richard
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> 
> 
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