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/diy/ - Do It Yourself

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769080 No.769080 [Reply] [Original]

http://www.startribune.com/local/west/273410261.html

Does anybody have any resources I could use to build a 3D printer similar in size to the one this guy used?

The bigger the printer the better.

>> No.769085

>>769080
No.

>> No.769087

No!

>> No.769102
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769102

>> No.769169
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769169

>>769102

>> No.769201

The tech is mostly the simple, reliable 3d extrusion method. In some of the images of the castle you can see some rails or tracks on the ground to either side and that is all you need to see for the big picture.

So a large/modular frame with X/Y/Z. Maybe it moves on the tracks as one axis, maybe he just likes rolling the machine in and out of the way. Some of the most clever part is probably the cement mixture extrusion head, his blend and the calibration of speed. I'd like to see some kind of reinforcement between layers, like a #2 head that embeds reinforcing wire in a layer/between layers.

You could probably do something clever and similar with a system that laid down dense foam with a very well understood/controlled expansion. Create a two-wall structure with solid foam windows or maybe blue paint spritzed in the places where you drop in rebar/wire panels. Extrude, cure/implant, fill the void space with concrete, Drop on a roof (or make a second pass for roof structure) cut out the windows and finish with stucco inside and out?

>> No.769203

>>769201
oh, and the different colors suggest that he is working batch at a time. Either pausing the machine manually to refill or being ready to mix up more when it beeps and returns to LOAD ME position. You might be able to automate this to some degree, like some kind of automatic dump/mix/dump-in-hopper but complexity will get dumb eventually.

>> No.769206

>>769203
>>769201
https://www.youtube.com/watch?v=DQ5Elbvvr1M
and an action video.

>> No.769232
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769232

>>769080

You need concrete pump and a fucking huge cartesian robot. As far as concrete composition goes look up contour crafting.
Here's some stuff on contour crafting, the best concrete 3d printing method out there.
http://contourcrafting.org/wp-content/uploads/2013/04/mega1.pdf

But for your case, you should keep it simple getting the settings tuned and writing software to control it should be the fun part.