TPU Archives

3d printing filaments, such as TPU, Thermoplastic Polyurethane materials. It’s flexible, heat resistant, has friction reducing properties and durability.

August 12, 2023September 27, 2024

TPU Update

TPU Upgrades and Updates

New Assembly and Drive Drive Extruder

Lab Work – Bolt On Upgrades

We are updating the extruder – TPU Update. Adding a bolt-on direct drive upgrade and replacing the Series 3 full assembly body.

The TPU update is a go. First, PLA is great. TPU is better for certain applications. However, we start with PLA. If you need flexibility over rigidity it is assumed that you want to test TPU filament. First, we will replace the existing assembly body on the MAX NEO and bolt on the new extruder to address the TPU issues*. TPU requires more force to drive the flexible filament through the assembly and out the nozzle. The direct drive will help with ‘refinement’ and focusing on pushing and pulling the filament more accurately and precisely.

Creality Accessories

Unboxing

Drive Motor

Assembly

Remove Extruder

Unscrew the Fans

Assembly

Again, in terms of next steps and the TPU Update, the update is not a *requirement,. However, after seeing enough test prints, it’s time to make the switch. Here is the bolt on solution from Creality for the Ender 3-Series, MAX NEO. Moreover, what do I mean by ‘requirement’ above? In my opinion, it would be extremely difficult to print TPU printables using a Bowden drive. I’ve tried, and it doesn’t work well. Finally, the Bowden drive doesn’t provide enough filament force and direct force to the filament through the hot end, hence the need for a direct drive motor. So, I want to emphasize that there’s no need to buy a new machine for TPU printing. Simply, do the swap and you can print both TPU and other high-temperature filaments as well.

Quick update: since this post was shared, we have received the parts for the TPU updates, allows us to begin the direct drive build. TPU filaments and prints can now be done without the necessary upgrades. Let’s get into the build and upgrade action! Side note, before we move off the direct drive action, I’d like to share other Halot updates including the Halot LCD fix and other break-fixes when adding a resin printer to your arsenal.

Stay tuned for additional photos and mini-clips covering the installation soon. In the meantime, here is a brief unboxing and assembly tear-down. Thanks!

June 27, 2023September 27, 2024

Ender Filament and Adhesion Issues

Filament Challenges and More

Print Plate Surface Adhesion and Heating Issues

3D Printer Adhesion Issues with PLA and TPU

Lab Work – Ender Issues Defined

A few more weeks of Ender issues…

Ender Filament and Adhesion Issues, are causing a delay in the TPU Neo Max upgrade progress. I will be sharing more Ender ‘lite’ issues, as we continue the TPU trial and face filament challenges. The filament change was primarily for lab work on bait designs and future locking mechanisms where TPU will be more appropriate. Despite this tangent, core printing has not ceased, I am still facing challenges with PLA.

Ender Filament and Adhesion Issues

There are countless issues that seem infinite at the moment. Everything from Creality Software to Ultimaker Cura, Sonic Pad issues, filament running temp, and new surface temperature problems… we have a lot of cover. I will break these down into 2 or 3 new posts over the next week. We will also revisit surface adhesion. Surface adhesion and surface temperature seem to be causing most of the issues on the Ender Max Neo. I must admit, tinkering doesn’t always result in perfect prints, even 60% to 80% of the time. I won’t argue, I’ll just focus on testing… the more runs, the better chance we have of increasing that 60% likelihood of successful prints.

Pictures will follow, as they say, a picture is worth a thousand words. The pictures will be shared to specifically cover thickness, fragility and test prints. Let’s get to printing!

June 12, 2023September 27, 2024

Ender 3 Max Neo Filament

Printer Base Stabilization, Adhesion and Print Heights

Ender 3 Max Neo Filament Solutions

Lab Work – TPU Speed and Cycle Times

For this article on the Ender 3 Max Neo Filament, a typical print cycle might run between 2-5 hours, possibly more. While the standard range has been 2-5 hours, we are now looking at 12 – 16 hours. Recently, we have extended the top maximum run times to just under 12 hours for our test models. Surprisingly, both print tests resulted in the a mess.

For the record, a paper towel holder caused this issue twice. Upon initial observation, as the prints moved vertically (up the y-axis), the printing quality deteriorated. Somewhere between the 4″ and 5″ mark, both test prints went awry.

I’m starting to think there is shaking issue with the table or even a stabilization issue where the printer. is located. Both issues might be addressed by printing the base slices, holder ends, screws, rods, and washers in a single print. These items should be printed separately to attach the towel roll and the rod. The rod that is slung between the holders can be printed in a secondary or tertiary step, This is mitigation issue number one, or we could address the stabilization directly. The printers are currently positioned where they stand, so there is not much I can do to move them around.

Once I received the new filament, we will print the rod. If it works, great. If not, then step two will be more tedious. The issue is mostly a space problem in the office. The filament should arrive later today, and I will post a quick summary once I finish printing the rod slice, assuming it is successful.

Ironically, a similar issue was occurring when I ran TPU through the machine. So we can conclude the Ender 3 Max Neo Filament post with this. Although I don’t think they are related, adhesion was the issue with TPU. Which we will address in a future post once we determine the correct nozzle temps, print speed, and adhesion setup. I have heard/read about using adhesion spray or glue stick. Another day, we will tackle those 3d printer issues/phantom printing phenomenon.