Creality CR-10 V2 Filamentsensor PC4-M6 / PC4-M10 Pushfit Adapter

This is an adapter to be mounted on a Creatlity CR-10 V2 filament sensor, that takes a PC4-M6 or PC4-M10 pushfitting. It probably fits on filament sensors of other Creality printers too. It's mounted using the original screws.

With this adapter, you can feed the filament sensor by a PTFE tube. Use a short PTFE tube of about 3-5cm, to create a simple filament guide. The PTFE tube is flexible and takes the filament from wherever it comes. No other filament guide needed. If your filament spool is on the opposite side of the printer, just use a longer piece of PTFE tube, so that it can bend enough to give the filament a smooth path into the filament sensor. You could also use the adapter to couple a longer PTFE tube from some kind of filament feeder, which often use PTFE tubes.

Important: Use a wider PTFE and at least recalibrate your extrusion. For me, the extrusion of 100mm was only 97mm when I used the PTFE tube which I also use from the feeder to the hotend, which has 1.9-2.0mm inner diameter. Before, using no tube and no adapter at all, it was perfectly 100mm. So even this 5cm short PTFE tube would have caused under extrusion. You may only adjust your extrusion, but the longer the PTFE and the more curves it makes on it's way to the filament sensor, the more resistance occours inside. On this side of the extrusion, it's not that important if the filament has more room to wiggle inside the PTFE tube. Here it just needs to guide the filament to the printer. So I recommend to use something like a 2.5mm inner diameter tube. Just search for something like "ID 2.5 OD 4 PTFE" (2.5mm inner diameter, 4mm outer diameter). It's cheap and makes your extrusion more constant.

To find out if it could fit your filament sensor too, take a look at the FreeCAD FCStd files included in the source file ZIP, and check the dimensions of the sketches.