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Using lego and a few custom components a 3D printer for chocolate is possible. I did this project a long time ago so the documentation is incomplet...
These were my first rough plans for a chocolate extruder. Powdered chocolate into a heated barrel, lego worm screws as the slurry pump through an eje...
bandsaw - 1" x 1" x 3" aluminum extrusion
I can't remember the diameter, but it was a close tolerance fit for the lego worm gear (close to 1/2in) Nice thing about lego is that it is super high...
4 x 5W bar heaters to supply the heat to melt the chocolate. I think there are cheaper solutions, but there were convenient and fit nicely in 1/8in h...
I put an interchangeable nozzle and set screw in the end of the chocolate extruder. the idea was this would make it easier to change the diameter of ...
i placed the cartridge heaters around the extrusion chamber like so. I need a jobbers drill bit to drill the 1/8in holes deep enough.
again, in theory the lego thermometer and programmable brick should be enough to do the chocolate control, but i used the PID and thermocouple because...
Here i am testing the extrusion chamber.
I can't remember all the details, but it's pretty simple. i used rack and pinions for the X and Y axis gantries. there are lots of ways to do this. ...
Here's the finished (well, you know, in a rough prototype kind of way) printer. there are only 3 controllable ports on the rcx brick i used, so one f...
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