A new approach to multi-colour prints

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antiklesys
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A new approach to multi-colour prints

Post by antiklesys »

Have you seen this?
http://hackaday.com/2016/06/20/mosaic-p ... -printing/

It seems they were also running a kickstarter campaign which was successfull and they started shipping out the units:

My first thought is that's a bit pricey as of now...but it looks neat!
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Re: A new approach to multi-colour prints

Post by Amedee »

Yes, saw it last year with the kickstarter campaign...

Will be interesting to see how well they manage to synch the filament change with the print.
With 1.75mm filament and a 0.4mm nozzle the ratio is about 1:20, so a 1mm offset in the filament gives 2cm extrusion with the wrong color, and the error margin with a Bowden is definitely higher than that.
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antiklesys
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Re: A new approach to multi-colour prints

Post by antiklesys »

Well, that is untrue.
If you check the how-to-set-up videos you see they're using this with bowden setups and actually they're increasing the lenght of the bowden itself.
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Re: A new approach to multi-colour prints

Post by LePaul »

I recall posting about this on the Ultimaker forum a while back. Since it only does 1.75mm, that leaves the Ultimakers out
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antiklesys
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Re: A new approach to multi-colour prints

Post by antiklesys »

LePaul wrote:I recall posting about this on the Ultimaker forum a while back. Since it only does 1.75mm, that leaves the Ultimakers out
Well...those who are still using 2.85mm yes.
I still find the concept interesting regardless of the filament size.

By checking on the pictures this is using an Ulticontroller, an Arduino Mega, a Ramps 1.4 board, 5 steppers and probably 1 servo.
It's functioning is quite interesting.
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Re: A new approach to multi-colour prints

Post by LePaul »

As do I, the video on the kick starter is very, very impressive
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Re: A new approach to multi-colour prints

Post by Neotko »

The problem I see with this kind of stuff it's that there's little to zero users reviews/videos. For example if you search bcn sigma prints, they exist, but for this stuff? I would love a solution like this, but to jump a expensive boat one needs some users reviews or something.
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Re: A new approach to multi-colour prints

Post by LePaul »

I agree, I like to see a lot of reviews that highlight the good, bad and could-be-better points of view on something that expensive too
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Re: A new approach to multi-colour prints

Post by Amedee »

antiklesys wrote:Well, that is untrue.
If you check the how-to-set-up videos you see they're using this with bowden setups and actually they're increasing the lenght of the bowden itself.
What is untrue?

I haven't made any statement, I just said that precision is important and difficult to achieve with Bowden -- nothing less / nothing more ;)
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Re: A new approach to multi-colour prints

Post by antiklesys »

So to answer to you I watched the set-up videos.
What they do to compensate that is using what they call the "Scrollwheel" (I wonder if they used this name cause it's just the rotary encoder of a mouse scrollwheel or for some other reason).
This is a small device that they ship together with the main package and is attacched externally before the extruder motor.
They then run a calibration session to measure how much filament your specific printer feeds and that provides sort of an "ad-hoc" calibration.
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Re: A new approach to multi-colour prints

Post by Blizz »

Pretty awesome. Would probably consider pre-ordering it I the UM2 was 1.75mm
Don't really feel like converting it as I have tons of 2.85mm filament.
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Re: A new approach to multi-colour prints

Post by danilius »

I really like the idea of being able to print a steak, although I suppose the texture will be a little tough.
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Re: A new approach to multi-colour prints

Post by Izzy »

You could use NinjaFlex, but if you do use PLA it will biodegrade just like a normal steak, only slower, and without the maggots!
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