The solution doesn’t always have to be complex.

As a new designer, I struggled to use Esun cardboard spool filaments with the AMS unit. The adapters that attach to the outer rim didn’t work well — they often got stuck inside the AMS, and I couldn’t use the RFID functionality. Eventually, I realized I had to find a way to transfer the filament onto an original Bambu spool.

So, I started researching. I looked into various respooler designs. While they technically worked, they were all quite cumbersome to use. That’s when I decided to focus on my own solution.

My first design was pretty complex — it even had blades to cut the spool. It actually worked, but the design was unnecessarily complicated. After many trials, I finally developed FS100 - Fast Spooler. Compared to where I started, it’s a much simpler tool, but incredibly functional.

Now, I use FSpool not only when I want to change spools but also to mount refill filaments once the original spools are empty. I even store refill filaments this way by vacuum-sealing them.

I know it may look simple, but there’s more engineering behind it than meets the eye. I hope it helps you as much as it helped me.

Note: Caution! Improper use may render your filament unusable. All responsibility lies with the user. While it’s not difficult to use, it does require some skill.