Filament Cleaning Filter Duo

This filament cleaning filter is a new iteration of the Filament Cleaning Filter model that I discussed in a previous publication. That article provides detailed descriptions of materials, manufacturing features, and the assembly process, as well as a video with step-by-step instructions. The new model features fittings on both ends, allowing it to be directly connected to a filament dryer — a device that not only removes moisture but also feeds filament into the printer through a PTFE tube.

Clean filament is a critical factor for successful 3D printing, especially when working on high-precision projects. Dust and small particles that accumulate on the surface of the filament can cause clogs in the nozzle, extruder gears, leading to feeding slippage, artifacts on the model, and even printing stoppages. The new filament filter is the perfect solution for those using dryers to feed filament, ensuring its cleanliness before it enters the extruder via the PTFE tube.

Design Features

• Dual Fittings: The filter is equipped with fittings for securely connecting PTFE tubes with a 4 mm diameter. This makes it easy to integrate into the filament feeding chain.
• Filter Element: Made from fine-grained packaging foam, effectively capturing dust and small particles.
• Compact Design: The filter takes up minimal space, which is convenient for limited installation areas.
• Versatility: Suitable for any 3D printer with PTFE feeding, regardless of the manufacturer.

Materials and Tools

1. PTFE Tube Fittings with a 4 mm diameter (2 pcs).
2. Foam with fine granules for filtration.
3. Filter Housing: Printed from PETG to minimize friction and ensure reliability.
4. Lubricant (Teflon-based) to simplify assembly and prevent misalignment.
5. Vise or Press for securing the fittings in the housing.

Filter Assembly

1. Preparing the Filter Element: Use a 9 mm punch to cut a cylinder out of the foam. Make a cut to create a "booklet."
2. Installing the Foam: Place the filter element in the central part of the housing.
3. Securing the Fittings: Use a vise or press to insert the fittings into the housing holes, lubricating them beforehand to prevent damage.
4. Assembling the Housing: Ensure all components are tightly and securely installed.

Usage

The filter is ideal for connecting to a filament dryer, preventing dust and other contaminants from entering the extruder. Connect PTFE tubes to the filter, position it conveniently near the dryer, and ensure the filament passes through the filter element smoothly.

Conclusion

This compact and efficient accessory ensures the highest quality for your 3D prints, eliminating issues with filament contamination. Thanks to its well-thought-out design with fittings, it can be easily integrated into any filament feeding system. Whether you’re working on large projects or high-precision details, this filter will become an indispensable tool for achieving perfect results. Happy printing adventures and flawless layers free of dust!

If you haven’t watched the video created for the previous publication, make sure to check it out. The video shows all the operations for manufacturing the previous filter. For the new model, the process will be almost identical, except that fittings will be installed on both sides.

The model in 3MF format can be downloaded via this link .

See the video for details:

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Parts links below:

• Pneumatic Fittings AKS PU4
• ESUN Filament PETG

Links to used tools:

• NOGA deburring tool and Blades
• Welding Torch
• Punch Tools
• Utility mini knife
• Vise for CNC Small

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