The most common reason an STL file may be not quite right is a mechanical connection where some piece isn’t quite as the designer expected, so the 3D model that interfaces with it no longer fits.

3D printing can be a fun and productive hobby and skill, but there can be a lot of confusion around the files involved. Here are some you should know about.

At New York's Toy Fair trade show over the weekend, Mattel unveiled its new, $300 3D Printer, the "ThingMaker," which will allow children to print their ...