Connect AMS 2 Pro to P2S

How to Connect AMS 2 Pro to P2S: A Complete Guide to Connection & Drying Settings

Written by: Model C

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Published on

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Time to read 3 min

If you're looking to expand your Bambu Lab P2S 3D printing setup with AMS 2 Pro, you’ve come to the right place. After successfully setting up two sets of AMS 2 Pro with my P2S, I’m sharing a step-by-step breakdown of the connection process, drying parameter configurations, and practical tips to optimize your workflow—all based on real-world testing and hands-on experience.

Simplified Connection: Less Wiring, More Efficiency for Connecting AMS to P2S

One of the biggest upgrades of AMS 2 Pro over the older P1S setup is how it connects to the P2S:

  • Plug-and-Play Simplicity: Unlike the P1S (which required a separate cable run to the printer), the P2S only needs a single cable to connect to AMS 2 Pro. This streamlined design eliminates unnecessary wiring and reduces the hassle of setup—kudos to Bambu Lab for prioritizing user experience.
How P1S connecting to the AMS
  • Smart Channel Optimization: A key hack for multi-AMS setups: the dual-channel port on filamanet buffer can be configured to use just one channel. This means you can connect up to 4 AMS units while only occupying a single channel, minimizing wear and tear on your hub and maximizing port efficiency.
use just one port on P2S filament buffer
  • Power Considerations:
    • A single AMS 2 Pro unit connects directly to the P2S without needing an external power supply.
    • For multiple units (e.g., my second AMS 2 Pro), an external power adapter is required. Budget-friendly options are widely available.

Setup Layout Tips

I added a riser to my AMS 2 Pro units to create storage space underneath, where I keep a bin for organizing filaments and cleaning supplies. This layout fits two AMS 2 Pro units perfectly; adding a third would be tight (though there’s minor space in the rear of the setup for future adjustments). I’ll share more about scaling to three AMS units once I test it!

2. Drying Settings: Temperature & Best Practices

After connecting AMS 2 Pro to P2S, the system automatically updates its firmware—once complete, you’ll see a “Heating” option in the interface (the core of the filament drying feature). Here’s what you need to know to avoid overheating or under-drying:

Two AMS in the Screen of P2S

Temperature Guidelines (Critical for Filament Health)

  • PLA: Never exceed 45°C! 40°C is ideal for thorough drying without risking localized overheating or warping of the filament spool.
  • PETG/PLA Universal: A constant 45°C (e.g., from a heated beverage cabinet) works for both materials—leave filaments for 24 hours, and PETG will dry completely.
  • Quick-Dry Mode: If you’re short on time, 50°C for 2–3 hours delivers solid results for most filaments (use this sparingly for PLA to avoid spool damage).

How AMS 2 Pro Drying Works (And What to Avoid)


AMS 2 Pro rotates the filament spool continuously during drying—this is Bambu Lab’s clever solution to prevent localized overheating and spool deformation. For this reason, Bambu Lab explicitly recommends against printing while drying: the rotating spool can interfere with print stability, so plan your workflow accordingly.
Monitor the humidity gauge during drying—you’ll see humidity drop visibly (in my tests, it fell from 60%+ to 45% in just a few hours). Patience pays off: slow, consistent drying ensures filament is moisture-free, which directly improves print quality (no more layer adhesion issues or popping sounds!).

3. Pro Tips for Multi-AMS Workflows

  • Alternate Drying/Printing: With two AMS units, use one for active printing and the other for drying—this maximizes uptime and keeps your filaments ready to go.
  • External Spool Compatibility: Note that external spool holders are temporarily unavailable when using two AMS units (I’m testing workarounds and will update this guide once I find a reliable fix).
  • TPU Printing Optimization: AMS 2 Pro has specialized GPU feeding optimizations to prevent TPU jams in the system—a game-changer for TPU users (my school doesn’t currently print TPU, so I haven’t tested this feature, but it’s worth exploring if you work with flexible filaments).

4. Next Steps & Future Testing

Now that my two AMS 2 Pro units are connected, I’m moving on to full platform calibration. Once complete, I’ll share my calibration workflow and tuning tips (only if they’re proven effective!). A huge thank you to the community for sharing insights that made this setup possible—this was my first time connecting two AMS units to a P2S, and the learning process was both challenging and rewarding.

Final Thoughts

Bambu Lab AMS 2 Pro elevates the P2S experience with simplified connectivity and robust drying capabilities. By following these connection hacks and temperature guidelines, you’ll streamline filament management and boost print consistency. If you have additional tips for AMS 2 Pro setup or drying, drop them in the comments—I’d love to keep the conversation going!

Disclaimer: All tips are based on personal testing with Bambu Lab P2S and AMS 2 Pro. Adjust settings based on your specific filament types and environmental conditions.