The 4 Axis digital display (DRO) from Ditron, I installed on my milling machine (Chinese F * 45 class) enables the RPM to be displayed during machining. Unfortunately it is a little tricky to attach the Hall sensor used for this to the spindle in such a way that it can pick up the signals from the magnet, which functions as a transmitter, without disturbing the work.
I also like to use anLED ring lightto illuminate the work area of the tool. So it made sense for me to combine both and cobble together an adapter flange. Maybe someone else can use the part. I printed withSpectrum PLA Proon myAnyCubic I3 Mega.
Available at thingiverse and prusaprinters.org
Initial Version 2.1