NOTE: I have made an upgraded version of this part here: https://makerworld.com/en/models/65285#profileId-68544

Channels to guide the PTFE tube entry to the filament injector , reducing friction. Also to guide the cable away from the poop chute exit.

Lets face it, the Bambu P1 and X1 series printers with AMS are amazing machines. My P1S is certainly the best 3d printer I have ever owned. Fantastically engineered and designed on the inside. On the outside, however, especially at the back, the plumbing seems to have been a last minute afterthought; a job given to the office undergrad student. Lots of people have designed pieces to help PTFE tubes and cables track nicely, but I couldn't find anything that worked for the “injector tube” entry and cable. They seemed to flop around aimlessly, putting friction in the PTFE tube, and the cable seemed to be perpetually dangling right across the ‘poop chute’ exit.

I designed this small piece to route both the PTFE tube and cable more accurately. It is designed to be mounted without screws or magnets (though I have added three 8x3mm round inserts for the magnet addicted!). The part is held in place by the cable plug itself, which has a locking tab. The part also creates a very gentle dynamic tension between the cable port and the external spool holder. (If you have dismounted that, please use the aforementioned magnets ;-))

To fit, simply:

1. Power off your printer and unplug the cable plug below the spool holder.
2. Press fit the cable into the lower channel (there is a chamfer at one end to facilitate a firm press fit) and fit the plug into the cutout shaped for it.
3. Press fit the 4mm PTFE tube into the upper channel It should pop in with a gentle click, then be loose enough in the channel for the tube to move freely. This is really important as tube moves back and forth with the action of the injector.
4. Plug the cable back into your printer. Power on.

Now your PTFE tube runs straight and true from the injector, and the cable bypasses the poop chute exit. Simples!

Printed in DRAFT at .24mm layer height, 15% infill, standard print settings (no supports, no raft, no brim). I used Bambu Basic Yellow PLA so you could see the part more easily, but a darker colour might be more tasteful ;-)