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Mellow LLL Filament Buffer


Mellow LLL Filament Buffer


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LLL Filament Buffer: Optimized Remote Feeding Device for 3D Printers

The LLL Filament Buffer is designed specifically for remote filament feeding in 3D printers, aiming to simplify the loading and unloading of filament. This buffer is equipped with two buttons for electric feeding and retracting operations.

Buffer Function:

When the 3D printer’s extruder feeds filament and pulls on the distant filament spool, the buffer detects this action and automatically sends a segment of filament towards the hot end. Each time this pulling occurs, the buffer repeats the feeding operation. This effectively reduces the pulling force on the filament by the extruder, maintaining stable pushing force and thereby enhancing the stability of print quality.

Filament Break Detection Function:

The buffer has a built-in filament break detector. When it detects that there is no filament inside the buffer, it sends a signal to the 3D printer to pause printing. To use this function, it is necessary to connect signal pins and modify the 3D printer’s configuration. However, the buffer function can be used directly without any configuration changes.

With these design features, the LLL Filament Buffer not only simplifies filament handling but also improves the stability and quality of the 3D printing process.

STL files and configuration information:



1*LLL Filament Buffer Parts(Not including Printing Parts)


1*LLL Filament Buffer (Print Random Color Petg)


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Satisfied Customers Let’s Look Reviews

Raven3DTech went above and beyond, they were onsite to assist with any issues and solved immediately. They sent the item out that afternoon to ensure I get the package without delay. Highly recommended site with genuine customer care. Thanks guys

Stephen Lucas Australia
Really good cusomter service and quality products!

Raven3d is literally your one-stop shop for any 3d printing-related needs. The owner is very knowledgeable about the things that you might need for your setup because he also occasionally builds printers for customers and you can also ask him if you want a finished printer. Shipping is also very fast. I am extremely happy with their service. Don't hesitate to buy from them especially if you're in Australia of course. Which I am not but still I buy my parts from them. 😉

Lance Reyes Romero Philippines

Outstanding customer service and support and the prices are comparable with overseas vendors.
I'll buy from Raven over others due to the past and continued service I receive.

Jim Pizzey Australia

“As described and better than expected regarding packing/shipping and product presentation. Highly recommended.”


“The quality is super. I have been waiting for the Goliath to come out for a long time. the packaging is also at the level.


“Exactly as described. Reached me a full week ahead of the delivery estimate. Super fast shipping!”