A Simplified Electronic Edge Finder

[rgsparber]

While I documented my last Electronic Edge Finder (EEF) I was also thinking about the next version. This new iteration trades less sensitivity for fewer parts and gains an automatic defense against probe crashes. It is compatible with CNC systems and has the same mechanical accuracy as the rest of my EEFs.

Using six resistors, one capacitor, two transistors, an LED, and a dual comparator, this EEF detects touchdown when the spindle resistance is greater than 1 ohm.

If you are interested, please, click here.

Your comments are welcome. All of us are smarter than any one of us.

Thanks,

Rick