For cheap and accurate linear motion, we couldn’t come up with a build that does better than [Raul]’s.

Novel bi-phase piezo motor enables accurate linear motion in an extremely compact package. (Nanowerk News) PI, a global leader in nanopositioning, precision motion control systems, and air bearing ...

A perpetual motion machine is (as the name implies) a machine that moves perpetually; it never stops. Ever. So if you created one today and set it going, it would keep on going until the Big Freeze.

Every degree of linear or rotary motion on a machine is called an axis. Each axis may operate independently, or many axes may need to be closely coordinated. Think of a robotic arm with four rotary ...