AMS Buffer Quick Internal Guide

During my search for a removal of the “pull back filament error” and in the quest of an improvement of the PTFE tubes routing, I have made a small Internal Guide which goes inside the AMS Buffer.

Compared to the other solutions I saw, it guides the PTFE tube as close as possible to the Buffer system, independently of any outside movement that could occur on the tube :

• Situation “as is”, without any additionnal guide : any outside misalignment of the PTFE tube will have an effet inside the Buffer system. So the sliding mechanism can rub, wear quickly and give you a printing error

• Situation with the Internal Guide : the orientation of the PTFE tube inside the Buffer is completely independent of any outside curving/movement etc…

Please note that the AMS Buffer is empty on the picture as I have already moved its components to my buffer re-design (see this model : https://makerworld.com/en/models/784757#profileId-722362), but it does not need any disassembling.

Installation is in fact straightforward :

1. remove the outgoing PTFE tube which goes toward the toolhead
2. unscrew the 2 fixations of the AMS Buffer on the rear panel with the 2mm screw (no need to unplug the electrical cables)
3. push in the Internal Guide, no glue needed as the fitting is tight. Just check that you have push it all the way in : the holes will be perfectly aligned as in my last picture
4. finished, you can put back the 2 screws and the PTFE tube