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:
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
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
