3Doodler 2.0 Create A 3D Object With A Pen
The 3Doodler 2.0 device has been shown at CES 2015; it's a unique way to do "3D printing". Take a look at the explanatory video below.
(3Doodler 2.0 pen, a free-hand 3D printer)
The new device supports ABS and PLA plastics and has two extruding speeds. You can also lock the extruder so it squirts out plastic constantly. Although my early efforts with this thing weren’t very good (I was able to make a wobbly box), with a little practice, I found that this thing can be a really fun way to make 3D projects.
The earliest sf reference that I know of for creating a 3D object with a penlike device is from Things Pass By, a 1945 story by Murray Leinster:
It makes drawings in the air following drawings it scans with photo-cells. But plastic comes out of the end of the drawing arm and hardens as it comes. This thing will start at one end of a ship or a house and build it complete to the other end, following drawings only.
(Read more about Leinster's Plastic Constructor)
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