Saber 2 is a 3D-printed gear-and-cam saber-toothed tiger that can be motorized to show an excellent loping movement. It’s 14” long and 10” tall and consists of 108 components of which 34 are unique parts, and it all moves with the help of a 6 VDC 60 RPM gearmotor. With threaded PLA rods to keep it all together, and tapped holes to secure the rods, one imagines the printer would have to be pretty finely tuned and leveled for the parts to move as elegantly as you see in the video.
3D printers come in all shapes and sizes. Most widely known is the FDM (fused deposition modeling) style, which was the easiest to adapt to a consumer grade machine. We’re still waiting for widespread availability of some of the more advanced 3D printing technologies — so you can guess how excited we were when [Yvo de Haas] dropped us a line on his open-source powder based 3D printer!
Powder based 3D printing is one of the most economic and easy to use technologies in the commercial industry because of one wonderful thing — no support material required! They work by laying down fine layers of powder which can then be bonded together either by laser sintering, or by using a binding agent applied by something similar to an inkjet head. Because of this, the surrounding powder acts as a support for any complex geometry you might need — you can quite literally print anything on this style of machine.
[Yvo] has just finished his own version of this style of 3D printer, called the Plan B. Mechanically similar to a regular 3D printer, his is capable of laying down fine powders, and then binding them together using a hacked HP inkjet cartridge. Check it out after the break.