Brendan Riuz is working on a project to allow a 16-station turret to be added to a CNC lathe. This requires a microcontroller to interface with the motion controller, stepper motors, and more, for which he chose a Teensy 3.5.

The solution is all-electric, with no compressor or hydraulics required, and features four different ways to interface with the CNC controller, with as few as three wires. Tool changes are possible in five seconds or less from eight 3/8″ and eight round stations.

A Pololu DRV8825 stepper motor driver carrier is included. A built-in voltage regulator can use up to 35V external DC power. See it in action in the video below.