Danger Science in Progress

This is a Danger: Science in Progress sign.  It doesn't do anything, it's a decorative sign for your lab bench. Print it in glow in the dark filament for a faux radioactive glow.

Filament colors (assuming .20 layer height):

• Layer 1-8 – 0-2mm – White/natural/glow-in-dark
• Layer 9-10 – 2.0 - 2.4mm – Black
• Layer 11-12 – 2.4 - 2.8mm – Red

Slicing the file

Cura (as of v4.13.1):

1. Load model, orient with back flat on the print surface
2. Open the Extensions menu, select Post Processing > Modify G-Code
3. Click Add a script
4. Select Filament Change
5. Enter Layer 8 as the layer
6. Click Add a script again
7. Select Filament Change again
8. Enter layer 10 as the layer
9. Click the Close button
10. Slice the model and export the g-code file
11. Go back to Modify G-Code and delete the two filament changes since they persist across sessions in Cura, and you probably don't want that.
12. Load the file in your printer and be prepared to swap filament when prompted by the printer or Octoprint.

PrusaSlicer (as of v2.4.1):

1. Load the model, orient with back flat on the print surface
2. Click on the Slice now button in the lower right corner.
3. Scroll the layer height slider to the right of the print preview down 4 layers (assuming .20 layer height).
4. Click the little plus button on the height indicator
5. Scroll up two layers (two from the top layer)
6. Click the little plus button on the height indicator.
7. You should have two colors on the the model and the height indication scroll bar.
8. Click Slice now
9. Click Export G-code
10. Load the file in your printer and be prepared to swap filament when prompted by the printer or Octoprint.

Print Settings

Printer: Ender 3 Pro w/ direct drive

Rafts: No

Supports: No

Resolution: 0.15-0.2mm

Infill: 15% or higher

Shells: 2+

Notes:

Printing with different colors will need manual filament swaps or a Prusa MMU2 or equivalent. For manual swaps your printer will need #define ADVANCED_PAUSE_FEATURE enabled in the configuration_adv.h file in the Marlin firmware to enable M600 commands. This is typically not enabled on the factory firmware from Creality. Prusa probably has it enabled.