Bambu Lab AMS Helper

This is my second design trying to come up with a solution for the “Jumping Spool” issues.
I shared my first design “AMS SPOOL GUARD”, but after that… I tried to document and learn a bit more to understand why do the spools jumps in the first place.
I shared some slow-mo video on facebook groups and got so many feedbacks (and mockings)
I think understanding the cause would help come up with a better solutions…

I think up to 3 things contributes to the spool jumps
1. When the filaments are low, the angle becomes sharper / steep.. so the extruder makes a more forward pull instead of downward…
2. Extruder speed is faster than the Front Roller, so it was holding it back (plus sharper angle too)
3. Tangled filament

so for Tangled filament, it's probably for someone smarter than me to solve lol
I am attempting to eliminate or at least reduce cause number 1, which is height differences.

First try, I tried to modify the first design, and move the “bar” from the back to the front, using the same mount (which was a nice secure spot mount it)
The problem with that idea I don't have a place for the mount for the left and right side of the AMS…

I also tried the suggestion using the AMS Button + a longer PTFE attached
This helped to reduce the wear and tear but it the ptfe tube is so flexible so it will still bend and the spool jumps too. Some one also suggested putting a battery to wedge the spool so it does not wobble, I tried that too (using the same mount as my previous design) with removable “wedges” of various thickness




So instead I looked at the possibility of mounting it on the First Stage Feeder, so I took my spare one and measured the openings…

Went through several iterations until I come up with the latest one.
No… it was NOT modelled after the Iron Throne :)

1 issue I found that, the filament will scar the Helper… This is just after 1 print…

So I added a 4x25mm SS rod on top, you can get them on amazon it should sit flush in the cavity provided.

and here's the finished project… at least for now…

This is by no means it will fix all… but at least it “should” make the angle less steep… and the filament will go more straight down to the first stage feeder.
I am still studying but at least this is for now one solution that might reduce the issues… I would love you to try and give me feedback…


I included the 3MF for Bambu Studio, comes in 2 plates… if you want to use the metal rod and logo, you can print plate 1, if you don't then you can print Plate 2.

0.3 mm first layer , the rest 0.2 mm Layers - Adaptive Layer
Gyroid infill at 30% to make it stiffer.

Step files are also uploaded if you like to tinker / remix… please do. Any suggestion / comments please hit the reply :)





Thank You!

NOTE: this was designed for the original AMS, I have not tested with Hydra Mods…