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Stein Robert [StoneTime]

Filament dryers for AMS systems - EIBOS X TETRAS

24. Juni 2025

Source: EIBOS

The EIBOS Series X TETRAS filament dryer was specially developed for the Bambu Lab AMS system and enables the simultaneous drying of up to four filaments. Thanks to its independent control, automatic humidity regulation and continuous operating capability, the device is ideal for demanding, long-term 3D printing processes.

A YouTube video with more information.



The EIBOS Series X TETRAS is an advanced filament dryer with four independent drying chambers, engineered for professional use alongside the Bambu Lab AMS system. It enables efficient, simultaneous drying of multiple filament types ideal for multi material printing or preparing several spools at once.


The two stage drying process starts with active dehumidification, where absorbed moisture is quickly and thoroughly removed from the filament. This is followed by a stable preheating phase that keeps the material dry during printing, improving print quality and adhesion. Once drying is complete, the system automatically switches to a climate neutral storage mode that continues to regulate humidity without requiring further user input.


A key feature of the TETRAS is its full independence: it runs autonomously with its own control system and does not interfere with the AMS firmware or the 3D printer. This makes the setup modular, flexible, and easy to operate perfect for demanding makers, small batch production, and research environments.


Thanks to unlimited runtime, the TETRAS is particularly well-suited for continuous operation and for working with highly hygroscopic materials such as nylon, PVA, or TPU. With plug-and-play integration into the Bambu Lab AMS 1, setup is quick and easy spools remain in the TETRAS and are seamlessly fed into the printing process.


Technical Specifications at a Glance:


  • Chambers: Four independently controlled drying chambers

  • Temperature range: 20–65 °C

  • Humidity range: RH 10 %–99 %

  • Heating power: 60 W per chamber, approx. 240 W total

  • Voltage: 110 V / 230 V (depending on region)

  • Dimensions: approx. 360×290×135 mm (closed), approx. 440 mm height (open)

  • Weight: net approx. 4 kg, gross approx. 5 kg



The TETRAS is built for high-performance environments and offers a durable, powerful solution for anyone looking to maximize print quality and reduce material waste due to moisture. Whether for personal use, educational institutions, or professional printing setups the EIBOS Series X TETRAS delivers reliable filament care at the highest level.

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