SpindleMeter

Simple true-spindle rpm measurement with emc

Hardware

The measurement is done via 2 ir reflex couplers residing in one common case.

the sensor was harvested from a old kemo kit which apparently wanted to be a 'security' card reader. in reality it was reading a hardwired (as in pcb-layout) 'code' consisting of 4 fields in the right white-black combination. go figure ;)

to amplify and clean up the signals they are fed through 3 74HCT14 schmitt-trigger gates each which gives nice, clean edges.

Schematic

Software

the software is emc2 config again:

Hal config

PyVCP config

add something like this to your custompanel.xml