Hotend Fan RPM Monitoring?

[EddyMI3D]

@gil80

If I use a 4-pin PWM fan, can I use the +/- on the fan header and the other two wires on the 2-pin Z-endstop?

Nope.

4 wire fan is

• Vcc
• GND
• PCM
• Tacho

Fan header is

• Vcc
• GND

Z-Endstop is

• Sig in
• GND or Vcc depending on used logic