Inline Filament Sensor for Qidi Printers

prusaprinters

The Qidi limit switch for the X-series printers (not including the X-CF Pro) comes in a rather large case that mounts on the top/back of the printer housing. This configuration does not play well with the internal spool filament flow.  This build uses the Qidi limit switch and cable, but the case is much more compact and can be installed inline anywhere along an existing filament path.It also addresses a design defect in the Qidi case that catches the filament and makes it difficult to thread.If you would like to use the Qidi provided mount, but want to address the design defect, you can use this: https://www.printables.com/model/140361-qidi-x-cf-pro-filament-sensor-case-easy-to-useThis case also accepts 4mm PFTE tubing such as a connection to a dry box.If you are using an X or Y Axis limit switch as a filament sensor, not that they come in Left and Right Hand versions. Choose the base that works.Requires two 3mm x 6mm button or truss head sheet metal screws. The Hex Head Cap screws are too tall.