Open RC F1 3D Printed TPU Tyre

So the rest of my open RC F1 car is printed and it was time to get onto the most tricky part the tyres. The rest of the car was printed in PLA but the Tyres need to be flexible so they are printed in TPU.

The TPU brand I purchased was Enotepad. It arrived in a box that looked plain apart from a logo that reminded me of good old word art. The filament felt flexible to touch so it was a good sign it was not PLA.

You can find my print settings at the end of the post.

MVIMG_20190205_225606983

My first print went horribly wrong because I forgot to adjust some of the settings. I still had retraction enabled and was printing a little too fast.

IMG_20190206_204926135

The second print was better but the layers were not sticking to each other and gaps were forming. On this print I disabled retraction and slowed down the print speed.

IMG_20190207_004650688

Third time luck I got the settings right. Again I slowed down the print speed to 20mm/s and set the extrusion rate to 115%. With these changes I got a great looking tyre that took just over 4 hours to print. Only another 12 hours of printing to go before I can test the car!

IMG_20190207_005239146

A side by side comparison of the different attempts.

A short video of the successful tyre.

Here’s what I used to print the TPU tyre

Printer: Ender 3 Pro

Software: Cura

Filament: Enotepad black TPU.

Print Settings:

Layer height: 0.2

Wall Thickness 0.8

Top layers : 3

Bottom layers: 3

Infill: 25%

Infill pattern: triangles

Printing Temperature 215 degrees

Build plate temp: 50 degrees

Flow: 115%

Initial Flow: 115%

Print speed: 25 mm/s

You can find most of the files I generated and used on my printer here https://github.com/kenjara/f1-3dp-project

The gcode for this tyre is CE3_Tire_V2.gcode and the Cura project file for the tyre is CE3_Tire_V2.3mf. There is also a TPU material and print profile in there but some small adjustments may have been made since I created those.

The Open RC project guide by Daniel Noree https://danielnoree.com/the-openrc-f1-build-guide/

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