Sunlu AMS lite Adapter Ultimate Version

Thank you for users comments. It looks SUNLU is changing their spool size from time to time.  Please check the overall external wall-to-wall width of your SUNLU filament spool and pick the correct print profile in the list 😊. All print profiles in this model page are for spool center hole diameter at about ø63, but with different length for different width (56, 59, 66.5 mm ,etc) of the spool.

If your SUNLU spool has larger center hole diamger at ø74mm and wall-to-wall thickness of ~62 mm, please use the adapter designed for JAYO branded filament spool in this link:  Jayo Filament AMS lite Adapter Ultimate Version by 3D-Dreamer - MakerWorld. 😉

This spool adapter is specially designed for the A1 & A1 mini with the AMS lite system. It's meant for non-Bambu Lab branded filaments with too large internal diameter (ID) spools. When loading those filament spools as-is onto the Rotary Spool Holder of AMS lite, the 'auto rotate' function of the AMS won't work properly. The auto rotation of the Rotary Spool Holder ensures the filament rolls on the spool are tightened and maintains tension. It also helps to retract filaments to the right position during auto filament changes while printing.

Rotary Spool Holder:

I modeled this Ultimate Spool Adapter to solve many problems I've experienced with other adapter models in the market. If you've encountered the issues listed below, you won't be disappointed with this design.

Problems with other adaptors:

1. Adapter outer diameter (OD) is too small to generate friction between the Rotary Spool Holder and the ID of the filament spool, bypassing one of the key functions of the AMS lite.

2. Adapter is too stiff, making it difficult to install into the filament spool. Some adapters' hooks get damaged during installation or removal.

   

3. Adapters are hard to align with the 3 'arms' of AMS Rotary Spool Holder, causing one of the arms fall into a slot on adapters, preventing the spool from sitting perpendicularly to the rotate shaft of the Holder.

   

4. Adapters are hard to be pushed onto the Rotary Spool Holders, especially past the grey rubber pads on the arms. Those pads are meant to increase friction to maintain good bonding between the filament spools and AMS for auto rotation. Poor adapter edge quality can prematurely wear out these pads during frequent filament changes.
5. Adapter gets pushed out of the spool when trying to load it onto the AMS, or when removing a spool, the adapter doesn't come off with the spool but gets stuck halfway on the AMS.

This Ultimate Spool Adaptor solves all the above problems:

1. It's flexible. I've printed with PLA, PLA Matte, PLA+, PLA Silk, PETG.  All are very flex as shown in the photos.
2. It's easy to install into and remove from a filament spool at will.
3. It slips onto the AMS Rotary Spool Holder smoothly with groove and gradual chamfer design.
4. Large outer and inner rims ensure the adapter stays in place until you remove it. The spool can rotate perpendicularly to the holder's axis to prevent unintended wear of AMS.

Hope you like this design! Feel free to drop me comments if more improvements can be added to this design. Thank you.

How to use it:

1. Slide the adapter smoothly into your filament spool's center hole. It's a loose fit, the beauty of this design.

   

2. Load the filament onto the AMS Rotary Spool Holder by aligning the chamfered groove to the “Arms” of the Rotary Spool Holder like the photo below.

   

   3. After proper loading, the full ring side of the adapter should facing outward.

   

Update 2024-11-05:

Thank you for TheBags's inspired comment about using this adaptor on modified SUNLU spool. I've added a new print profile by adjusting the adaptor a bit longer. This is for user who converts their empty SUNLU spools (Convert link can be found here) so that Bambu Lab filament refills can fit into the wider converted spools. Users do not need to adjust the length in the slicer on their own. 

Desiccant Jars designed to perfectly match with this Adapter!

High Quality Desiccant Jars fit in Spool Adapter by 3D-Dreamer - MakerWorld

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