Mellow Tangle Guard Automatic Filament Cutter for Air Printing Issues
Mellow Tangle Guard Automatic Filament Cutter for Air Printing Issues
9 in stock
ETA:

Tangle Guard Filament Cutter Module Overview
Product Description
Mellow Tangle Guard helps prevent air printing issues by trimming deformed filament tail-ends before they stall feeding into your PTFE path. The passive, tension‑activated design means no sensors, wiring, or power, while a CNC‑machined aluminum body and replaceable SK5 blade deliver clean, reliable cuts. Best for spool-end problems like bends, tangles, or tape/glue residue; performance depends on your setup. Exclude TPU.
Why I Need the Filament Cutter
When a spool tangle, snag, or uneven filament diameter creates abnormal resistance, the extruder may keep pulling without feeding properly. This cutter intentionally cuts the filament under high tension so the printer’s runout sensor detects “no filament” and pauses the print, triggering the normal out-of-filament alert (app/notification) so you can reload and resume instead of air-printing for hours.
Key Features & Requirements
- Passive, tension‑activated mechanical cutting
- CNC aluminum body
- Replaceable SK5 blade
- Red/black finish
- Filaments: PLA/ABS/PETG etc. (exclude TPU)
- Installation: mounting-dependent; adaptable to many setup
Product Specification
- Cutting method: passive, tension‑activated mechanical cutting
- Body material: CNC‑machined aluminum
- Blade: SK5 high‑carbon steel (replaceable)
- Color: red & black
- Filament: 1.75 mm class FDM filaments such as PLA / ABS / PETG (see limits; exclude TPU)
- Installation: mounting-dependent; adaptable to direct-to-extruder, reloaders, and AMS/MMU‑style setups
Compared with DIY Printed Cutters
Compared with many DIY plastic cutter designs, this CNC metal cutter is built for better long-term durability and dimensional stability. The replaceable SK5 blade (HRC 60+) offers strong edge retention and good toughness for cleaner cuts over time.
Package Includes
- 1× Mellow Tangle Guard CNC metal cutter module (Blade installed)
Installation Guide
Explore Precision Upgrades for Your Bambu Lab
Explore Precision Upgrades for Your Bambu Lab
Explore Precision Upgrades for Your Bambu Lab
Explore Precision Upgrades for Your Bambu Lab
FAQs about Mellow Tangle Guard Automatic Filament Cutter for Air Printing Issues
What problems does it solve?
It’s designed to prevent air printing issues and reload failures caused by bent/tangled/taped/glued or misshapen filament tail-ends that can’t feed smoothly into the tube/path.
How does it trigger without sensors, and what about TPU?
It’s purely mechanical—resistance + filament tension routes the filament into the blade for a cut. Exclude TPU (not recommended).
How can I make sure this product fits my printer?
A: You can check the compatibility information in our product filters or in the Features section of each item. If you’re still unsure which part is right for your printer model, feel free to contact our support team for confirmation.
How can I track my order?
You will receive a YunExpress order number immediately after your order ships.Use this number to track the package from our warehouse to your destination country.
For the following countries, you will also receive a corresponding local tracking number.Please use the official website of the local carrier for real-time delivery updates:
- United States: USPS
- Germany & Netherlands: DHL
- United Kingdom: Evri
- Spain: CTT
- France: Colis Privé
For all other regions: Only a YunExpress tracking number will be provided (no local carrier tracking available).
What if the tool I purchased doesn’t meet my expectations?
If you’re not satisfied with your purchase, we offer a hassle-free return policy. Just contact our customer support team within 30 days, and we'll help you with the return or exchange process.
Customer reviews
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Placed my order on February 3rd and received it on February 12th —only 7 business days! Shopping was easy, communication was great, and delivery times were really decent. Very happy with my purchase!
Brad BrockwayEngineering -
Found this shop on Reddit, chatted with a real person about the P2S filter I needed. Asked if they could ship to SG, they checked and made it happen! Super happy because this filter is basically impossible to find locally and always out of stock everywhere else. Fast, friendly, and solved my problem perfectly. Will buy again!
Ok_Government_1125Hobbyist in Singapore -
Bought a ventilation system but changed my mind last minute. I thought returns would be a huge hassle, but they told me there’s a return warehouse in Houston only about a 10-minute drive from where I live in Missouri City. Drove over and returned it super easily. Super convenient return process, great experience overall!
RayRobertProject manager
The Mellw Buffer is a very useful device for long 3D prints. It automatically switches filament between spools without stopping the printer, allowing for nearly continuous printing. The system works with many printers and also supports large 5 kg spools.Another big advantage is the support — the call3d does not leave users alone with problems and actively helps to resolve any issues.It’s a great solution for users printing large models or running small 3D printing farms.
Works great, has already saved me from wasting filament. Setup is quick and easy, it has two tension settings. Glad i purchased
This is a really useful little tool. In my case my extruder has plenty of pulling force, so it still feeds fine, but having this in the setup is still a nice improvement and makes things more reliable.
This happens sometimes with the AMS—if it gets jammed and the machine doesn’t detect it in time, the print is basically done. Voron builds have had modules like this for a while, so it would be great to see at least a simple filament runout detection switch added. For more advanced setups, pairing it with some of the refill/continuation ideas people share on Reddit would be awesome.
Honestly, Bambu’s own packaging can be kind of brutal sometimes. I had a spool where the filament was taped down inside, and that tape ended up going straight into the PTFE tube and jammed everything hard. Super frustrating.
Mellow Tangle Guard Automatic Filament Cutter for Air Printing Issues