SUNBU LAB LITE - AMS Lite on Sunlu S4 (Remix)
Print Profile(4)
Bill of Materials
Description
This model is a remix of the original design by MrX.3D, tailored to optimize the integration of AMS Lite functionality into the Sunlu S4 dryer. The design replaces the original lid of the S4, enabling a sealed environment for filament storage and drying, protecting the filaments from humidity while maintaining full drying capabilities.
Key improvements and features of the design:
• Reuse of AMS Lite spare parts: Only a few components from AMS Lite are required, such as 2 feeders, the motherboard, and the cable. This means the model can hypothetically be created without owning an AMS Lite.
• Material efficiency: Reduced material usage with only 4 larger parts to print, making it faster and more cost-effective to produce.
• Simplified installation: The design uses a few printed clips and some screws, for an easy assembly process.
• No RFID readers or spool hubs: The model eliminates the need for RFID readers and spool hubs, allowing the use of oversized spools and significantly reducing weight. Despite these changes, the AMS functionality remains fully intact, during filament changes the retraction required is only a few centimeters, so there is no the need to rewind the spool.
• No handles: The lid is designed to be lightweight and easy to lift for filament changes. An optional accessory is available to keep the lid open during such operations.
Optional add-ons:
- A rod to hold the lid open.
- Adapter for an internal hygrometer.
- New numbered markers for feeders.
- PTFE tube holders, for those who prefer using tubes between the lid and feeder inputs (3cm long)
Printing recommendations:
The model was printed in Bambu ABS, though ASA is also a suitable choice to prevent warping during filament drying, PLA and PETG are not recommended. The parts for securing the feeder tower and all clips are printed in PETG, these parts are not exposed to heat and are more flexible than PLA.
For best results, use my optimized print profile, specifically designed to ensure ease of assembly and high-quality prints. This profile guarantees precise tolerances and easy to remove supports.
If you like my work and want to give me a support for other models, you can buy me a coffee here: https://buymeacoffee.com/roket_one
Assembly:
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 | • Join the two parts of the lid together. • Use the smallest H-clip for the central connection and the larger H-clips for the sides. • The clips are intentionally tight to ensure a firm hold. To attach them, press them into place using the back of a screwdriver or a similar tool for better leverage. |
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 | • Insert the two poles into the lateral slots on the lid. • Push them fully into place using a screwdriver for assistance. • Once the poles are seated, secure them by attaching the two dedicated inserts to lock them in position.
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• Insert the feeder cables through the designated slots in the lid (the slots are directional, ensuring correct insertion). • Route the connectors and cables behind the motherboard housing, as shown in the reference image. • Attach the cap to join the two parts of the tower, ensuring a tight fit. • Insert and tighten the two M3x16 screws on the sides of the tower to create a solid structure. • Place the feeders into their positions on the tower and secure them using the screws provided with the feeders. • Attach the connectors to the motherboard, following the correct numbering and orientation as shown in the reference image to avoid inversion. • Secure the motherboard to the base of the tower using three M2x4 screws. • (Optional) If you plan to use PTFE tubes, attach the tube guides to the feeders at this stage. | |
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 | • Place the entire tower with feeders onto the base, ensuring the connector cable aligns properly with the designated slot on the base. • Slide the two tower supports into position: • The smaller support goes on the side where the cable exits. • The larger support goes on the opposite side, as shown in the reference image. |
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• Connect the AMS cable to the motherboard. • Replace the original lid of the S4 with the newly assembled one. The stock lids are easily removable. • (Optional) If you want to use PTFE tubes, insert them from below and connect them to the fittings under the feeders. • Note: If using the black PTFE tubes from Bambu Lab, slightly enlarge the holes as these tubes are slightly larger than the standard white ones. | |
Additional features:
To enhance insulation, I applied an adhesive gasket around the lid, ensuring better sealing and protection from external humidity. I used this: https://it.aliexpress.com/item/1005005338595522.html
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An optional rod can be printed to hold the lid open during filament changes. As shown in the reference image, the design comfortably accommodates 2kg spools inside the dryer and seamlessly integrates them with the AMS functionality. |
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You can also add an internal hygrometer using the dedicated holder included in the design, for precise monitoring of humidity levels.
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And thats all folks!! Now Enjoy your Sunlu S4 Mod, aka Sunbu S4 AMS Lite!!
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License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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