What happens when you cross a 3D printer with a knitting needle? A new research project called FilaLoom is finding out, and the results look like nothing that comes off a normal print bed.
Printing plastic and thread together
Researcher Joram de Haas built FilaLoom around a simple idea. Knitting and 3D printing both stack material over and over until a finished object appears, so why not combine them? Instead of dropping threads into a print by hand, a dedicated thread tool does the placing automatically, working alongside the regular print head much like the tools on a multi-tool printer.
That automation matters because it lets the embedded material grow far larger and more complex than earlier hand-placed experiments. The team shows flat 2D weaves, full 3D knit-style shapes, and even small mechanisms with thread built right into them. Plastic gives the part its form, while the thread adds flexibility, texture and strength that plain filament struggles to match.
How to experiment with the idea at home
You do not need a research lab to try the basics. Design a shallow channel in your model, pause the print just before it closes over, lay in a length of thread, wire or thin cord, then resume. The next layers lock it in place. Start with a simple strap, a bracelet or a small hinge, and use a snug channel so the thread cannot wander.
Try it on your printer: grab a free beginner-friendly model and give mixed-material printing a go at flarelab.com, where we share models and guides for makers starting out.
Frequently asked questions
What is FilaLoom?
FilaLoom is a research project by Joram de Haas that combines 3D printing with thread. A dedicated tool places thread into the part while it prints, so yarn and plastic end up woven together.
Do I need a special printer to try this?
Not today. FilaLoom adds a separate thread-handling tool head, similar in spirit to a tool-changer printer, so it is still a research prototype rather than a bolt-on kit.
Why embed thread inside a printed part?
Thread can add flexibility, strength or texture that plain plastic cannot. It also opens the door to knit-like 2D and 3D structures and even small built-in mechanisms.
Can I get a similar effect on a normal printer?
You can experiment by pausing a print and laying thread or wire into a recess, then printing over it. It is fiddly, but it teaches the same core idea of mixing materials layer by layer.
Inspired by reporting from Hackaday. Rewritten by Flarelab for beginners.
