A sturdy solution for stacking two AMS units one on top of the other, and permitting filament changes without moving AMS units or dismantling. An optional Magnetic Handle profile is supplied to allow the bottom AMS lid to be held open. Read on…

Update:

There is reportedly an alternative design now (Aug'25) for the AMS 2 Pro (V2), with a smaller number of support ribs on the sides. It looks to have a similar rib configuration to the current AMS (V3.) All available versions of the ‘Lambda’ Stacker support the AMS (V3), so all should also support the AMS 2 Pro (V2.) Users have reported that the AMS 2 Pro (V2) but I would welcome feedback from other users who have found success.

If needed, for the mag. handle use the version for AMS 2 Pro.

Update: V5
The V5 'Lambda' Stacker supports both the AMS 1 (V3) and the AMS 2 Pro!

Please use V5 profile is you don't have an older AMS (V1.)

Update: V6

The V6 ‘Lambda’ Stacker profile now added. It has the same dimensions as the V5 Stacker, but there is an additional slot to allow it to also support the older AMS 1 (v1.) I do not have an AMS 1 (v1) and so cannot test it. The slot profile is the same as the previously posted BETA V6 TEST profile, but obviously as a full stand now.

Please only use the V6 profile if you need to support at least one older AMS (V1.)

That's two AMS 1s, two AMS 2 Pros, or a mix of the two!

It's designed to support the AMS 1 (V3 - i.e. the current AMS model at time of publishing, Apr'25) and the new AMS 2 Pro.

Due to the dimensional differences I've had to slightly widen the span of the bracing to accommodate the AMS 2 Pro.

The V4 assembly instructions are applicable for the V5. There are more slots now, and so positioning the supported AMS types is less obvious / intuitive. I have therefore included some additional V5 assembly notes below - to help with correctly positioning the AMS types onto the V5 Stacker.

I don't have dimensions for the older AMS 1 (V2) and would welcome comments on whether the V6 Stacker happens to also (securely) supports the older AMS 1 (V2) unit. Print the V6 BETA profile to test.
 

UPDATE: A new profile has been added for a magnetic handle on the lid. A magnetic handle is clipped onto the lower AMS, and the upper AMS has a magnetic base is simply placed in the front void between filament slots 2 and 3. The lower lid is then able to latch, magnetically, onto the upper AMS, holding it open. It only works with the ‘Lambda’ stacker (original, or latest V4) - as it relies on the relative AMS positions to work.

UPDATE: New V4 design available with cross-bracing to significantly improve lateral stability. This version has screw holes to allow the stacker to be screwed to the bench. Assembly guide also provided now.

Dimensions of the Stacker: Excluding filament / cable entry the two units occupy around 410mm / 16" depth, and 550mm / 21 3/4" high.

It is proving to be strong and is well balanced in usage. The stand is positioned directly below the AMS's centre of gravity, and the 90mm / 3.5" top section - with alignment slot - does make it surprisingly stable. The V4 update - with lateral bracing arms - side-to-side stability looks to be good.

Warnings:
* Please use the stand at your own risk. I'm responsible only for breaking my own AMS units if the stand fails!

* The stacker is designed around the AMS with the centre of gravity directly below the filament reels. If the top AMS unit is empty that moves the centre of gravity forward, so please assess the stability based on a loaded AMS.
* If the lower AMS has to be removed then the top AMS must be taken off first, as the lower AMS provides stability.

UPDATE: * This works for the latest V3 AMS units. Older AMS versions are not currently supported.

To try to maximise strength, I printed the top arms horizontally with a large flat support section. I've also used PETG-CF. The lower triangle base should not be subject to the same stresses as the top arms, and so was printed in a more practical orientation.

(When preparing the print in latest Bambu Studio (v1.10.1.150) the supports did not slice. I don't know whether this is a known bug. I had to go into 'Support' tab and change the support to 'Type: Tree', slice it - where supports were then shown - and then went back and changed back to 'Type: normal(auto)', and sliced it again. This workaround then correctly slices, with supports shown.)