Filament Runout Sensor

I want to remind that the models were created for processing (grinding, sometimes repainting, etc.)

See the video for details:

I connected the sensor to the ZMAX axis as follows: from left to right: plus, minus, and signal. The button in the depressed state should close the "minus" and "signal" while unlocking the "plus", for this it was necessary to cut the "plus" track and connect the buttons that are closed to the button contacts.