Filament detection switch for Voron Nightwatch extruder Filametrix

Using this as a belay extruder to feed my G2E/SB.  My filament path to the filament rack is 3+ meters so reliable extrusion was an issue. This solved that. I also wanted a filament runout sensor at my entry point.   

BOM

• Omron D2F-L3-D3 simulated roller lever microswitch

• (2) M2x10 self tapping screws

• PC4-M6 pneumatic connector - smaller style with 8mm hex

If using alternative mount:

• (2) M3 5x4 heatset inserts

• (2) M3 x 35 SHCS

• (2) T-nuts

• (2) M3 X 12 SHCS

Print with standard Voron settings.

Midbody has designed in supports for switch cavity.  Tolerances are close in the area of switch and filament path.  A well tuned profile is a must. Printed with Polymaker ASA.

After removing supports, make sure the wall facing switch lever is clean of any seam pips etc. Scraping with a pocket screwdriver should do.  

Install switch with 2 M2 x 10 self-tapping screws.  Check operation.  Solder wires to outer terminals and route wiring out provided wire path.

Modified cover is required for screw clearance and added height to midbody.

M6 PTFE connector optional.  If using, cut PTFE to length using printed guide and chamfer ID.  Connector flats should be parallel to body faces. Must use clearanced latch.

If not using PTFE connector, use standard latch and just insert tubing into body as usual.  All other assembly as per the Nightwatch manual located here: https://github.com/VoronDesign/Pocket-Watch/blob/main/Manuals/Assembly_Manual_Nightwatch.pdf

Alternate mount and spacer included for mounting horizontally to extrusion.  Use hardware listed in BOM, spacer gets 2 M3 heatsets inserted.