3 Body Problem Coasters

These drink coasters are based on the 3 circles logo from the "3 Body Problem" Netflix series. It's multi-colored and can be printed all at once with an MMU/AMS, or printed in parts and assembled. I printed these in PLA, but would recommend PETG if they are going to used for hot drinks. 

This design was inspired by these Westworld coasters I printed several years ago.

MMU/AMS

Download the MMU version of the design, assign the base&rings to one filament and the inserts to the other, and print.

Single Extruder, Manual MMU (workaround)

For simple prints like this, it is fairly practical to perform a multi-material print with manual filament changes. You can setup PrusaSlicer as follows:

1. Select your printer (mine's a Prusa MK4) and make sure PrusaSlicer is set to show “Expert" settings
2. Go to “Printer Settings” > “Capabilities” > “Extruders” and set it to 2 or more.
3. Go to “Printer Settings” > “Custom G-code” > “Tool change G-code” and input “M600” for the tool change G-code
4. If you want PrusaSlicer to generate a wipe tower, turn it on under "Print Settings" > “Multiple Extruders” > “Wipe Tower” > “Enable”
5. Back at the Plater, configure which filament is assigned to which parts for printing.

When you run the print, the printer will require you to perform a manual filament change for each filament change in the file. Thankfully it's not hard to keep track of which filament should be loaded each time when you're only switching between 2 colors. The settings in the MMU 3mf file I uploaded here require 8 filament changes.

Single Extruder, No MMU

Print the base&rings in one color and the inserts in another. The “0.15” version was a perfect fit for me, but I've also included a “0.20” version with larger tolerances and a “0.10” version with smaller tolerances. In the Fusion360 file, the “tolerance” parameter sets the width of the gap between the rings and inserts (default is 0.15 mm).

With perfect tolerances the inserts just press into place and don't move, but they could be glued in place too.