Filament Y-Adapter

Filament Y-Adapter
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### Introduction

Sometimes a simple task can take months. I had been looking for a way to create an adapter that would allow filament to be fed both from the AMS hub (AMS2 Pro and/or AMS-HT) and an external spool. The goal was to keep it compact, efficient, and reliable.



The AMS system is quite sensitive: even a slight resistance in the feed path can trigger an error. So it was critical to ensure a smooth channel for the filament. I tried several designs, kept postponing the project, coming back to it... And finally, the adapter turned out just as I had envisioned it: small, geometrically optimized, and fully functional.



### Material and Print Tips

The primary material is PETG. I recommend printing it with a fine nozzle (I used 0.2 mm) and minimal layer height. Why? Because every layer is essentially a step. The fewer the steps, the lower the resistance for the filament—especially when feeding from an external spool, where