If you’ve ever had a multi-material print ruined by moisture, you know the pain. Stringing, under-extrusion, failed layers—it’s the stuff of 3D printing nightmares. Even with Bambu Lab’s AMS (Automatic Material System), humidity can sneak in over time. That’s where the Sunlu AMS Heater comes in, and today, we’re taking a hands-on look.
What Is the Sunlu AMS Heater?
The Sunlu AMS Heater is a plug-and-play upgrade designed specifically for Bambu Lab’s AMS. It sits neatly on top of the existing AMS enclosure and works to dry filament in real time as you print—no more pre-drying in a separate dryer and hoping for the best.
We tested a demo unit provided by Sunlu, which is currently available for pre-order on their website. The final product will have a transparent lid and some additional refinements, but this sneak peek already has us excited.
Why Dry Filament Matters—Even in AMS
Here’s the deal: even though the AMS is sealed, it’s not airtight. Over time—especially in humid environments—your filament will absorb moisture, leading to:
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Stringing
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Popping noises
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Under-extrusion
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Layer separation
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Complete print failure
Moisture doesn’t just mess with aesthetics—it can ruin functional prints too.
Key Features of the Sunlu AMS Heater
Let’s break down why this heater matters:
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Real-Time Drying
Instead of drying filament beforehand, this unit dries it while printing, streamlining your workflow.
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Independent Power Supply
The heater runs even when your printer is powered off, keeping your spools dry 24/7.
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Onboard Controls
You can set your material type, target temperature, and run time. The system automatically toggles the heater to maintain safe levels—no cooking your filament.
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Stackable Design
It stacks cleanly on top of the AMS and includes a sliding vent cover to release moisture and prevent reabsorption.
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Space-Saving Workflow
By integrating directly into your existing setup, you get powerful drying without adding a separate filament dryer or cluttering your workspace.
Final Thoughts: Is It Worth It?
If you already dry your filament religiously, you’ll appreciate this tool for simplifying that process. But if you’re like most makers—juggling multiple filaments and chasing clean prints—this might be a game-changer.
Especially if:
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You print in multi-material mode frequently
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You live in a humid climate
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You hate babysitting filament
Then yes—this upgrade is definitely worth considering.
Where to Get It
👉 Pre-Order the Sunlu AMS Heater here: https://www.sunlu.com/s/AMSHeater-TKCOMMENT