Is the original Bambu AMS a filament dryer?

No. It is an automatic material storage and feeding system. Desiccant helps storage, but the original AMS does not actively heat and dry a wet spool.

Does SUNLU S1 Plus replace AMS?

No. S1 Plus actively heats one spool and can feed while drying, but it does not automate colour or material changes.

Can SUNLU filament work in Bambu AMS?

Some SUNLU spools and materials can, but compatibility depends on spool dimensions, edge shape, material flexibility and abrasiveness, and the specific AMS generation. Check current Bambu spool requirements and do not force a poor fit.

Do you need both systems?

Only when automatic changes and active drying are separate recurring needs. Otherwise buy the system that solves the actual bottleneck, or consider AMS 2 Pro after pricing its required accessories.

Bambu AMS vs SUNLU S1 Plus: Automation or Filament Drying?

Original Bambu AMS automates feeding and material changes but does not actively dry filament. SUNLU S1 Plus dries one spool up to 55 C but does not automate colour changes. AMS 2 Pro combines the jobs at higher cost.

Exact dryer option: SUNLU S1 Plus Filament Dryer Black. Confirm the exact model, configuration, seller, and return terms before ordering.

Check SUNLU S1 Plus on Amazon

The two products solve different problems

Choose original Bambu AMS for automatic spool selection and material changes on a compatible Bambu printer. Choose SUNLU FilaDryer S1 Plus when one wet spool needs active drying and brand-independent feed-through storage. Neither replaces the other.

Job	Original Bambu AMS	SUNLU S1 Plus	AMS 2 Pro
Automatic material changes	Yes	No	Yes
Active heated drying	No	Yes, 35–55 °C stated	Yes, up to 65 °C stated
Capacity	Four feed slots	One spool	Four feed slots
Brand independence	Limited to compatible Bambu workflow	Works as a standalone dryer	Limited to compatible Bambu workflow
Main hidden cost	Hub/buffer and connection path	Bench space and single-spool throughput	Connection kit and drying power adapter on X1/P1

Original AMS: buy it for automation

The original AMS stores and selects compatible spools, reads Bambu RFID data, and automates colour or material changes. Its sealed enclosure and desiccant support storage, but there is no active heater. Calling it a dryer gives buyers the wrong expectation.

Use Bambu’s current AMS compatibility guidance before buying or loading a third-party spool. Spool width, diameter, cardboard edges, soft filament, abrasive material, and friction through the feed path can change the result.

SUNLU S1 Plus: buy it for one-spool drying

SUNLU specifies a built-in circulation fan, a 35–55 °C range, a 24-hour timer, one-spool capacity, and support for 1.75, 2.85, and 3.0 mm filament. It can feed filament while heating.

Check the current SUNLU FilaDryer S1 Plus

That temperature ceiling is the decision boundary. Follow the exact filament maker’s drying instructions; do not assume one preset or duration applies across PLA, PETG, TPU, PA, PC, or filled materials.

AMS 2 Pro: integrated but not automatically cheaper

The AMS 2 Pro combines automatic feeding, sealed storage, spool rotation, and drying up to 65 °C. X1/P1 owners need the correct buffer or hub and connection parts, plus an external power adapter to use drying. Price the complete kit.

The correct buying sequence

If failed prints point to moisture, confirm that diagnosis and buy a dryer with the required temperature and spool capacity.
If manual spool changes consume time, buy compatible automation.
If both are frequent, compare AMS 2 Pro’s complete installed cost with an original AMS plus standalone dryer.
If neither is frequent, use dry storage and keep the setup simple.

Final recommendation

Buy AMS for automatic material handling and SUNLU S1 Plus for active single-spool drying. Do not buy one expecting it to perform the other’s job. Choose AMS 2 Pro only when the integrated workflow repays its adapters, compatibility limits, and higher total cost.