Tefifon Replacement Part: Mat

The original mats of Tefifions were made of a material that unfortunately has not survived the decades well:

So I designed a 3D printable replacement part that mimics the design of the original as closely as possible:

The key to the design was:

• to get the color right. But nobody knows the exact color. So I suspect it is a mixture of bronze and the darkened color of the degenerate remains (see photo above).
• to have a soft, cushioning surface on which the cassette rests.

I achieved this by:

• Printing the part with a color change from black PETG to bronze PETG, so that the bronze is a bit darkened by the black layers below.
• Coating the surface with matte, transparent spray rubber (available in car accessories stores).

Printing

I have printed the part using these PETG filaments:

• PrimaSelect Bronze
• dasfilament black

There are two color changes: Start with bronze, switch to black and then go back to bronze.

The settings in the 3MF file and the part orientation are optimized in a lot of ways to achieve the best result possible. So I recommend using the provided 3MF file to start from.  If you want to use a different slicer, then here are the key settings:

• 0.15mm layer height (first layer 0.2mm)
• Filament changes at:
  • 0.65mm from bronze to black PETG
  • 0.95 mm from black to bronze PETG
• Fill angle 135°
• Avoid crossing perimeters, detect thin walls, seam position rear
• Ironing on all top surfaces
• Add a height modifier for 0.9 to 2.0 mm  to turn ironing off for the topmost layers

Post-Processing

The surface of the printed part is to hard and does not provide any grip. So I recommend coating with matte, transparent spray rubber:

Before coating, I removed all fingerprints and dust with isopropanol. The part should be slightly elevated for coating.

I then applied a total of 6 coats, 15 minutes apart. To get an even application, i sprayed over the part from all four sides for each coat. Let the part dry for at least a day.

Attaching

I have attached the mat to my tefifon using Marabu Fixogum elastic adhesive:

This way, you can easily pull off the mat again later, for example, if you want to access the screws underneath.

Result

I am now very happy with the result:

Design and Source Code

The part has been designed using OpenSCAD. I have provided the source code for download.

Happy printing!

If you like this design, then please leave a like and also post a photo in the comments.

Looking for more Tefifon related stuff? Have a look at my Tefifion collection. 

You might also want to check out my other designs.