Ender 3 Filament Runout Sensor Mount

Update 11/14/2022: The model has been updated to print in two halves. Rather than the previous version that printed as a single large body and a small press-fit cover, the new split design is much easier to print and assemble, and looks much cleaner, due to removing the cutout for the cover.

Update 12/06/2021: The model has been updated to improve reliability as the lever arm of the switch relaxes over time. It is highly recommended that you print the updated version if you are currently using the original model. Also included in this update are a version with a clip to hold a JST XH-2 male connector for wiring the switch, and a press-fit plate that will cover the cutout in the front. It comes with multiple tolerance variants. Start by printing the -0 version. If it's too tight, try the -1, if it's too loose, try the +1.

This model replaces the original X-axis motor mount/belt cover with one that adds a filament runout sensor. The switch used for this build is a [HiLetgo K