Add an Arduino-based tachometer to your CNC router

In order to get a good cut with a CNC router, the cutting tool speed needs to be properly set. Since his CNC didn’t come with RPM feedback, Troy Barbour came up with his own solution using an Arduino Nano along with an IR emitter/sensor pair. The spindle was set up with a single reflective surface, … Continue reading Add an Arduino-based tachometer to your CNC router