Neptune 4 Filament Runout Sensor Mounting Stud
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Repair part for broken stud on Neptune 4 / Pro / Plus / Max filament runout sensor.
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Model information
- Source
- Printables
- Category
- Other Printer Parts & Upgrades
- License
- Creative Commons — Attribution
If your Neptune 4 filament runout sensor stud is broken, you can replace it with this piece. Requires an M3 heat set insert. This does not replace the innermost plastic piece, just the metal stud holding piece.
I don't know if this breaking is common. I didn't break the one photographed, it came to me this way :)
I made this instead of designing an entirely new studless mounting bracket as there are several nice brackets that expect this stud. It took less time to make this than an entirely new bracket.
While slightly thicker than the stock metal piece, this part should work with stock screws. The filament sensor will sit roughly 1mm deeper than with the original plate.
Installation: Press a M3 heat set insert, 5mm diameter, 3mm to 5mm long from the bottom. Thread bolt from bottom to clear out plastic, then remove. Mount stud piece to original filament runout sensor with 2x screws. You can use standard 2x M3x8 or M3x10 bolts if you are missing the stock screws.
To mount the sensor, you can use the original stud bolt or another M3 bolt ~12-20mm long. Do not overtighten the stud screw through the sensor plastic housing as nothing is stopping you. Use a nut and washer on the M3 bolt to fix the bolt into place. To do this, see the photo.