April 3, 2013

Standard 3D printers require significant mechanical structure to provide movement on the three axes. But Jon Wise wants to build a machine in a new way. He is working on an alternative design for a 3D printer that uses radial arms with a minimum of mechanical engineering. The calculations is much more complicated than the conventional design, but it can be provided by the Raspberry Pi computer in real-time.

This is a 'proof of concept' implementation which I made without any prepared plans. A great thing about it is that you can put the two motors and the third pivot point in a rough triangle to suit the scale of your ideas and then put a suitable platform in the middle with three arms that are long enough to move the platform. Then measure what you have done and transfer the values into the code. The code is a bit messy at the moment but I could let you have a copy if it would help. - Jon Wise


Posted in 3D Printing Technology


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dlg wrote at 4/19/2013 11:30:32 PM:

take a look at this it is non-cartesian and it works http://reprap.harleystudio.co.za/?tag=3d-printer

Brian Schmalz wrote at 4/4/2013 6:23:35 PM:

Seems like a really good opportunity to use an EiBotBoard to control and drive the steppers. There are some folks who have put RaspberriPis right on their Egg-Bot robots and used the Pi to run Inkscape and send the movement commands to the EiBotBoard on the EggBot. Just an idea anyway.

JD90 wrote at 4/3/2013 10:54:53 PM:

I'll just say I don't see it. Non-Cartesian systems have been made before. If there was a merit for it, I'd think the niche would have been served before, especially given the Raspberry Pi having about the power of a desktop PC from a decade or so ago.

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