3D Printed Bumper

This is a simple 3d printed bumper for the Adafruit NeoTrellis M4 designed for flexible filaments. This provides protection and comfort to the acrylic case.

Flexible Filaments

The bumper features a cut out on the back side for cables. The design is optimized for 3D printing using flexible filaments, such as Cheetah Ninjaflex and does not require any support material. 

How to 3D Print Flexible Filament 

Our learn guide will walk you through some common practices for 3D printing with flexible filaments successfully. 




Slice Settings

Use these settings as reference. Values listed were used in Ultimaker's CURA 3.X slicing software. This was 3d printed using an Ultimaker S5 and 3.

  • Material Profile: TPU 95A
  • .2 layer height / .35 Line Width
  • 2 wall line count / 10% infill
  • 220C/60C printer temp
  • 8mm retraction distance /35mm/s retraction speed
  • 25mm/s print speed (150mm travel)

Parts, Tools, Supplies

All we need for this project is the Adafruit NeoTrellis M4 Kit, flexible filament and a 3D printer.

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Ninjaflex and similar TPU filaments come in a variety of different colors.

Edges & Triangles

Two versions, a simple bumper with clean edges and one with triangles (for grip?).

This guide was first published on Dec 04, 2018. It was last updated on Dec 04, 2018.

This page (3D Printing) was last updated on Sep 09, 2021.

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