Key Advantages

• Only 7g of filament per ring.
• Compatible spool brand name impressed.
• Rounded contour helps with traction, avoids pullback errors and stabilizes the spool inside the AMS.
• Rounded contour lowers the chance of damaging plastic storage bags.
• Flat variant for full AMS compatibility (see tolerance and compatibility section)

Update

25.03.2024: Corrected wrong brand label on 199mm flat variant. Added 199mm STLs and 3MF files to RAW files download

Description

This isn't merely a typical cardboard spool adapter. By decreasing its contact area by approximately 50-60% compared to standard adapters, it significantly enhances contact pressure. Consider it akin to winter tires on a car, which generally require higher pressure to minimize their contact area with the ground. Additionally, its rounded edges help stablizing the Spool inside the AMS and minimize the likelihood of damaging plastic vacuum bags. The adapter is not only lightweight, weighing a mere 7 grams of filament, but it is also reusable and easily attaches in the same manner as conventional adapters.

This adapter has proven to be a game-changer, eliminating the need for other AMS modifications that claim to address retraction and entanglement issues. Remarkably, I’ve found that spool weights are no longer necessary. However, as with any solution, individual results may vary. Happy printing!

Tolerances

Compared to plastic spools, cardboard spools are more vulnerable to various external factors, such as moisture, temperature fluctuations, and variations in the production process (up to +/-2mm). Consequently, you may encounter slight variations in the fit, which can range from slightly looser to tighter. In extreme cases, the spool adapter may not fit at all. In these scenarios, you can make the necessary adjustments to the model's scale using the Bambu Slicer for both the X and Y axes. Ensure that you uncheck the "uniform scale" option before proceeding. If your spool's diameter exceeds the default setting, consider increasing the scale by 1%. Conversely, if your spool's diameter is smaller, reduce the scale by 1%, and your setup should be ready for use.

Compatibilty

Elegoo Cardboard Spools tend to be on the larger side of the spectrum. While they can fit without an adapter, when paired with the rounded adapter, the 200mm variant surpasses Bambu Labs’ specifications. The rounded 199mm variant is within the specs but it comes down the the individual spool as the adapter might get strechted past the specs. Consequently, users have a couple of options to address this:

• AMS Lid Spacer: Utilizing a spacer for the lid can accommodate the larger spools effectively.
• Custom Backside Rollers: Consider implementing custom backside rollers specifically designed to support larger rolls.
• For a straightforward solution, leaving the lid open (or at least not locking it) provides ample room for the spool.

For individuals who prefer not to alter their AMS and wish to close the lid, I have incorporated a nearly flat variant that aligns with Bambu Labs’ specifications.

Printing

When it comes to printing, you should produce two adapters for each cardboard spool. It is advisable to steer clear of materials that exhibit low friction, such as Silk-PLA, to ensure optimal performance. Most of the time I use Standard PLA.

Other Filament Brands

This adapter is available for other brand's cardboard spools (Link to Collection):

• 3DHojor
• Aceaddity
• ANYCUBIC
• ATA
• Comgrow
• Creality
• Duramic 3D
• Elegoo
• ENISINA
• Eryone
• eSun
• Filafarm
• FormFutura
• GratKit
• Grauts
• JAMG HE Conjure
• Jayo
• Kexcelled
• Meltbro
• Ninetec
• OEM Mika3D
• Overture
• OVV3D
• Polymaker
• R3D
• Raise3D
• Redline Filament
• Reprapper
• Prindano
• SainSmart
• Sovol
• Spectrum
• Sunlu Elite Series
• Tinmorry
• Tronxy
• TTYT3D
• Two Trees
• Yousu
• YOYI YOYI