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TPU Filament Buffer – Synchronized Feeding for Flexible 3D Printing

TPU Filament Buffer – Synchronized Feeding for Flexible 3D Printing

$43.99
$43.99
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15 Jun | Estimated Delivery
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TPU Filament Buffer Overview

Printing with two TPU filaments using Mellow TPU Filament Buffer

Why Upgrade to This Filament Buffer Unit?

Printing flexible materials like TPU demands stable, low-friction feeding. This electric buffer unit provides guided active feed/retraction, synchronized filament delivery, and built-in break detection to drastically reduce Bowden tube resistance and slipping. It lets you print faster and more reliably with soft TPU (80A–85A) and other flexible filaments while avoiding jams, layer shifts, and failed prints.

Key Features & Requirements

  • Active electric feed & retraction with manual control buttons
  • Synchronized feeding for faster speeds and reduced filament compression
  • Built-in filament break / runout detection (auto print pause)
  • Quiet motor & durable structure for extended printing
  • Ideal for soft flexible filaments: 80A–85A TPU
  • Reduces Bowden tube resistance, jams, and layer defects

Product Description

Printing flexible materials such as TPU requires high precision. This buffer unit features electric feed and retraction, synchronized feeding to reduce Bowden tube resistance, and filament break detection for stable, reliable printing with soft TPU 80A–85A. It includes manual control buttons, a quiet motor, and durable construction. Fully compatible with Klipper boards; works with Bambu Lab printers but without filament detection. Signal wiring and firmware setup are required.

Product Specification

  • Function: Electric filament buffer + runout sensor
  • Filament Compatibility: TPU 80A–85A & flexible materials
  • Control: Automatic sync + manual feed/retract buttons
  • Motor: Quiet, long-life design
  • Board Support: Klipper-based mainboards (full function)
  • Bambu Lab Compatibility: Works normally, but filament detection NOT supported
  • Setup: Signal wire connection + firmware configuration required

Better Than Basic Passive Buffers

Standard passive buffer units only reduce slack—they do not assist feeding, eliminate friction, or detect breaks. This electric buffer unit actively pushes and retracts filament to match your printer’s speed, drastically lowering resistance for soft TPU. It also adds reliable runout detection that passive buffers lack, preventing costly failed prints and delivering consistent high-speed performance basic units cannot match.

Package Includes

1 × Electric Filament Buffer Unit
1 × Set of connection cables & accessories
1 × User & setup guide

Installation Guide

LLL Plus Buffer Test: Auto Load & Unload for TPU Filament Printing

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 TPU Filament Buffer – Synchronized Feeding for Flexible 3D Printing

How difficult is the firmware configuration for Klipper mainboards?

Firmware configuration for Klipper is beginner-friendly with basic technical knowledge. The unit requires simple parameter adjustments (e.g., feed/retraction speeds, sensor triggers) in the Klipper config file—most users complete setup in 15–30 minutes. We recommend following our step-by-step guide (included with the product) or referencing Klipper’s official flexible filament documentation for best results.

Why isn’t filament break/runout detection supported on Bambu Lab printers?

Bambu Lab printers use a proprietary filament detection system that is not compatible with third-party sensor hardware. The core functions of the buffer unit (electric synchronized feeding, reduced Bowden resistance) still work seamlessly with Bambu systems—only the auto-pause feature for filament failures is unavailable.

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

  • 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!
    testimonial author avatar
    Brad Brockway
    Engineering
  • 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!
    testimonial author avatar
    Ok_Government_1125
    Hobbyist 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!
    testimonial author avatar
    RayRobert
    Project manager
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TPU Filament Buffer – Synchronized Feeding for Flexible 3D Printing

$43.99
$43.99