This is my winning design for the Beer Coaster Design Challenge w/ Brew Gentlemen. I used Terrain2STL to generate the terrain of Pittsburgh including the 3 rivers and Braddock. I have to use this tool to repair the exported terrain before I could import it into OpenSCAD. I used the OpenSCAD script
my Square Coaster Blank.scad to generate the required 3.5” rounded square w/ 0.25” radius shapes (exported STL files attached). The
edit Model.scad script moves and scales the terrain so it's placed inside the rounded square. The
coaster - final v5.stl is my design that I've exported from this script.
I took the Brew Gentleman logo and converted the transparent background to white so I could import it into OpenSCAD and use the color differences as height differences. The
BG Logo.scad opens this modified PNG and scales it and differences it with a cube to make it printable.
I printed the coaster design with two colors - blue for the rivers and green for the land. I accomplished this by first slicing my model and then splitting the G-code into two files on a layer boundary (
G0 Zxx where
xx is the movement to the next layer height). I added a
G0 Z20 to the end of the first file so it would print the first few layers (the rivers) blue and then lift the print head up to 20mm. At this point, I would manually switch to green filament and extrude enough to remove the remnants of the blue filament.Then the print would resume at the
G0 Zxx code and continue the print where it left off.
I printed the Brew Gentlemen logo in black. I wanted a pop of color so I used a gold Sharpie on the letters, but left the border in black. I also used the gold Sharpie to mark the location of Brew Gentleman on the map.
I used this clear resin to cover the river and mountains to the highest point and then let it dry overnight. The next day I used a glue stick to place the logo so it wouldn't move and poured more resin to the top so it's level with the brim. Once more night of drying and the design was complete.