Post Processing


Step 1: Removing Protrusions from Dots

Due to the nature of FDM 3D printing, it is likely that there will be roughness or protrusions on the top of the braille dots that may make them less comfortable to scan with a finger. These protrusions can be removed by placing the braille sign dot side down on a sheet of fine grit sandpaper and moving it back and forth while gently applying pressure.

It should not require a lot of sanding to make the dots more comfortable to scan. No more than 5 to 10 gentle strokes should be sufficient if your 3D printer settings are set properly (see note below). Be sure to hold the sign level during sanding so that material is removed evenly from the dots.

Sanding protrusions

A Note About Additional Methods

Before relying on the additional methods below to finish braille signs, be sure that your filament is free of excess moisture and experiment with your 3D printer's settings, including the following, to try to reduce or remove stringing.

String removal can greatly increase the time it takes to produce a sign, and can lead to deformation of dots and/or the sign's base plate. It is worth spending some time to try to dial in your 3D printer settings to avoid stringing.

Step 2: Clipping Strings (Optional)

Removing strings with sidecuts

Step 3: Heat Gun Method (Optional)

Removing strings with heat gun

Braille sign warped from too much heat

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