[Perry] was interested in adding a 4th axis to his CNC machine, but not very excited at the prospect of spending hundreds of dollars on the parts and electronics to make it work. There is a very ...

Suiting external step and direction full- or half-step drives, the HS-20USB 4-axis step-motor controller features a USB interface. The controller features encoder support for each axis, auxiliary ...

Advances in motor design have allowed different types of robots to both specialize for industrial functions and converge in precision.

Here’s a great CNC hack that adds a ton of functionality, a DIY rotary 4th axis! [Jim] had started this project over a year ago when he originally ordered the gearhead off eBay, but like many good ...