PiBot rotary bed 3d printer with dual paste extruder

PiBot is polar movement 3d printer that can print with paste materials from dual syringe extruders. It is inspired by PiMaker polar 3d printer which has very detailed build instructions.

From project description:

As part of Francis Bitonti and Xuedi Chen's vertical studio at the architecture school of Rensselaer Polytechnic Institute, teams of 3 were given the task to design a paste extruding 3d printer. Our team initially put together a Printrbot Simple Maker's Edition, and using the basic concepts behind this printer, as well as inspiration drawn from the PiMaker, designed our own.

The main features of the PiBot are a flexible dual extruder system combined with a rotating polar bed. This grants us the ability to both print one object with a combination of materials from the two extruders, as well as print two of the same object at the same time, due to the rotating bed.

Team: Nicholas Nord, Hiroki Sawai, Lauren Famularo

All the files for making your own PiBot are here:

http://www.thingiverse.com/thing:536108

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Video updates on Theta polar 3d printer

Theta printer has unique design, you can check the first post about it here:

http://diy3dprinting.blogspot.com/2013/11/theta-printer-4-extruder-polar-3d.html

Here are some videos that show how the printer construction is progressing:




Simultaneous printing on Theta. The blue plastic is PLA and the yellow is ABS.



Two extruders printing on the same object at the same time.




Videos by Tyler Anderson

All files are at GitHub:

https://github.com/unlimitedbacon/Theta-Printer

Theta printer project blog:

http://csulbmae472group7.weebly.com/

First print results in PLA and ABS at the same time on same object

Update (12.1.2014.):

here is a new video and successful print of the iconic Octopus:

From video description:

Testing the new firmware by printing an octopus. This print took about 1.5 hours with a feedrate of 20 °/s. In this case, thats roughly 55 mm/s. This printer should be capable of at least 40 °/s.

Update (21.8.2014.):

Theta was submitted for Hackaday prize contest:

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Theta printer - 4 extruder polar 3d printer in development

Interesting looking polar 3d printer developed by RepRap forum user unlimitedbacon. He calls it "3d printing record player". The rotating circular build plate is called the ϴ ("theta") axis and the swinging arm is called the R axis. They replace the  X and Y coordinates in a standard 3d printer.

Features:

• 4 extruders for multiple colors and materials
• 320 mm print platter (meets or exceeds the area of current RepRaps)
• 80425 mm^2 print area
• 0.084 degrees/step angular resolution (ϴ Axis)
• 0.20 mm/step linear resolution (R Axis)
• it comes in two versions. The lasercut edition and the reprap edition (printed parts and threaded rods)

https://github.com/unlimitedbacon/Theta-Printer

Development process on RepRap forum:

http://forums.reprap.org/read.php?185,178379

Update (26/12/2913), Theta 3d printer is now moving and running:

http://diy3dprinting.blogspot.com/2013/12/video-updates-on-theta-polar-printer.html

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RepRap Lewis

Printer that was never developed to maturity, but has very interesting and unique design with SCARA arm and circular build platform. It does not need any bearings or non-printable linear systems.I hope someone will finish this project some day.

https://github.com/sjkelly/RepRap-Lewis

http://reprap.org/wiki/Lewis

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