Top Mount Filament Runout Sensor for Voron V2/Trident

Top Mount Filament Runout Sensor 

Designed this for my Voron 2.4.  I use a top mount spool holder feeding down the back of the machine.  See my other designs for the spool holder.

Designed for a Roller Microswitch / generic Omron SS-5GL2
- https://www.amazon.com/gp/product/B00MFRMFS6 (this is the one I used)
- https://www.digikey.com/en/products/detail/omron-electronics-inc-emc-div/SS-5GL2/137204
- https://www.aliexpress.us/item/2255800292331336.html (Search result, seller not validated)

4MM OD PTFE Interference fit

You may need to slightly bend the roller switch arm.  It should not be triggered when empty.

Wiring:
I use the 'NO' (normal open) contact setup on an endstop pin
My wiring runs on the outside back panel of the machine with some adhesive wire clips
I use a microfit connecter roughly 3" or 75mm from the roller switch
Any AWG wire suitable for the connectors is fine.

My Klipper Config:

[filament_switch_sensor my_sensor]
pause_on_runout: True
event_delay: 3.0
pause_delay: 0.5
switch_pin: !PG12 #Adjust this for your board

Yes - there is no cover

I use the included PAUSE / RESUME macros for mainsail

BOM
(1) ~25mm PTFE top guide tube length
(1) SS-5GL2 Micro roller switch
(2) M2x10 self tapping screws
(2) M3x8 SHCS for mounting
(2) M3 20x20 T Nuts for mounting
Appropriate wire length and connectors for your setup.
Available Endstop port on the controller board
Zip ties and wire management