A Complete Guide to 3D Printing Bambu TPU: Tips and Key Considerations for Successful Prints
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Time to read 6 min
Hi there, I'm Big Bro. Today, we're going to dive deep into how to print TPU90A & 95A with the H2D printer successfully, sharing all the critical steps and practical tips to make your TPU print journey smooth.
Table of contents
1. Drying: The Critical First Step Four Recommended Drying Methods and Parameters Important Note for Bambu TPU drying 2. Filament Feeding Methods: Minimize Resistance for Bambu TPU print Method 1: Top Direct Feeding (Highest Success Rate) Method 2: External Mount Feeding for Bambu TPU setup Method 3: Sealed Box Feeding (For Post-Drying Moisture Control ) Universal Principle for Bambu TPU guide 3. Practical Tips: Easy Removal of TPU Prints and Supports Alcohol Spray Method 4. Bambu TPU Print Settings: Focus on the Essentials Final Thoughts on Bambu TPU print
The Author : Big Bro
Big Bro is a renowned content creator and technical blogger in China’s 3D printing sector. He is primarily active on short-video platforms, focusing on practical 3D printing tutorials, equipment modifications, consumable reviews, and peripheral product development—with particular expertise in Bambu Lab printer-related technologies. He has garnered a strong following among 3D printing enthusiasts and users alike.
1. Drying: The Critical First Step
First, let’s start with the basics of Bambu TPU setup. Take a look at these examples: this is what TPU looks like before drying—you can see significant stringing, and in more severe cases, the printed parts are completely unusable due to dimensional inaccuracies. In contrast, this is TPU parts after proper drying: it’s neat, with none of the issues we saw earlier, proving that drying is foundational for Bambu TPU printing. As moisture is the main culprit behind printing flaws. Let’s break down the best drying methods for H2D Bambu Lab TPU setup:
TPU parts without drying
Four Recommended Drying Methods and Parameters
Important Note for Bambu TPU drying
Regardless of the drying method, always check the heat resistance temperature of your spool (consult the manufacturer). If the spool isn’t heat-resistant enough, it may soften and deform when drying TPU at high temperatures—ruining the spool and potentially damaging your printer
2. Filament Feeding Methods: Minimize Resistance for Bambu TPU print
TPU used in every printers is extremely sensitive to feeding resistance; even slight resistance can cause extrusion failure or filament stretching during TPU print. Here are three feeding methods (ranked by resistance from lowest to highest) optimized for Bambu TPU setup:
Method 1: Top Direct Feeding (Highest Success Rate)
- If you have an H2D printer (or A1/P1P), set up a spool rack on top of the H2D printer. Feed TPU directly from the top to the print head—this eliminates unnecessary bends and keeps resistance to a minimum, making it the most reliable method for Bambu Lab TPU print. This approach is especially effective for softer grades of TPU in H2D TPU setup, where low resistance is critical.
Method 2: External Mount Feeding for Bambu TPU setup
- Mount the TPU spool externally on the side of the Bambu Lab printer with the filament facing downward.
- Use the specific tube designed for TPU printers and route the tube from the back of the 3D printer—this is a key step for smooth TPU feeding.
- Key note for H2D TPU print: Always use the RIGHT not right😂 print head of the H2D printer (the left one is not suitable for TPU printing). Pull the black feeding tube of the H2D printer out, secure it externally (e.g., with tape), and never leave it loose inside the H2D printer—loose tubes can fall and get jammed, causing TPU extrusion failure during TPU print.
- Additional tip for Bambu TPU setup: Keep the Bambu Lab printer’s chamber door open as much as possible during printing. Excessively high chamber temperatures increase the risk of Bambu TPU print failure.
Method 3: Sealed Box Feeding (For Post-Drying Moisture Control )
Many users store dried TPU in sealed boxes to keep it dry, but there’s a right way to feed TPU from these boxes:
Option 0: The Ultimate Solution with a Filament Buffer (For Pursuing Speed & Softness)
If you’ve tried the methods above but still battle feeding resistance—especially when trying to push print speeds beyond 50mm/s or when attempting to print ultra-soft materials like 85A or even 80A TPU—the bottleneck you’re hitting likely demands a hardware-level solution.
This is precisely the purpose of a professional-grade TPU filament buffer. It’s not just a passive guide; it’s an active feeding assist system:
Active Synced Feeding: Its motor detects the extruder‘s pull and synchronizes a push, virtually eliminating friction and compression within the Bowden tube. This is the foundation for achieving 2-3X the standard TPU printing speeds.
Supports Ultra-Soft Filaments: It provides a fully supported, guided path for soft TPU, effectively preventing it from buckling or getting crushed inside the tube, making printing with 80A-85A materials a reliable possibility.
Electric Control & Break Detection: Combined with its electric feed/retract and filament break detection, it offers the most reliable end-to-end management for flexible materials.
For users pursuing ultimate success rates and material limits, adding a buffer like this is the key step from “getting it to print” to stable, high-speed, high-quality printing.
Universal Principle for Bambu TPU guide
The logic applies to H2D or H2C as well as A1/P1P and similar FDM printes (only the routing position differs for H2D). The softer the TPU like 75A or 70A used in H2D, the more critical it is to minimize feeding resistance—and top-mounted spool feeding is always the safest option.
Remove PTFE tube for TPU print
3. Practical Tips: Easy Removal of TPU Prints and Supports
Removing TPU prints and supports from the Bambu Lab printer can be extremely difficult, but this simple trick makes it much easier for Bambu Lab TPU setup:
Alcohol Spray Method
Critical Warning for Bambu TPU guide: Only use alcohol on PEI plates when handling Bambu TPU print parts. Check compatibility with other build plate materials first to avoid damage, which could impact future Bambu TPU setup projects.
4. Bambu TPU Print Settings: Focus on the Essentials
You don’t need to tweak most TPU print parameters for the H2D printer—just focus on these key points :
- Flow rate: Never set it too low for TPU printing with the Bambu Lab printer. It’s better to have a slightly higher flow rate than a lower one—too little flow reduces interlayer adhesion, leading to cracked TPU prints from the printer.
Final Thoughts on Bambu TPU print
The core logic for successful is simple:
- First, dry TPU thoroughly to remove moisture;
- second, minimize feeding resistance find a Bambu TPU Print aid Spool Holder from Makeworld or try well-engineered filament buffer (You will love it).
- finally, use small tricks like alcohol spray to simplify TPU print removal from the Bambu Lab printer.
Once you master these steps, TPU printing with the Bambu Lab printer will no longer be a "frustrating" task—instead, you’ll be able to print flexible, durable parts like elastic accessories, shoe soles, and protective covers. If you still encounter issues with setup, start by checking if the TPU was dried properly and if there’s any blockage in the printer’s feeding path—these are the most common causes of failure. We hope these tips help you master TPU print and unlock more creative possibilities with the Bambu printer and TPU material!
