A client came to us with a plastic part for an old International Harvester fridge from the 1950s. The fridge featured a customizable door. The part in question was a door handle that could be switched out. It was in bad shape. The part was cracked in many places, edges broken off, and a set of holes were drilled into it
Handle in its current state
With some flat bed scanning, which is more useful than one would thing, and a digital caliper I was able to recreate the handle fairly easily. One tricky part was matching the font. Using a web site called What the font, I was able to find a close match to the original font.
Originally, I was looking for a way to 3D print sound files using histograms and a displacement commands in Rhinoceros ( a CAD based program). In Rhino the command called “apply displacement.” However, I discovered by using gray-scale topographic maps the same command could be used to make topographic models. The command displaces a surface based on the color values of a texture applied to the surface. Each pixels value is interpreted as a z axis value, creating a point cloud which the command then pulls the surface to the points
converted topographic map; note the steps in the gradient
.At first I used simple topographic maps of states, but they were only in color and my imaging software was not very good at changing them into gray-scale without a loss of quality. Next iteration, I’ll be using STRM data, which is gathered from satellites in black and white. A downfall of the STRMs is that they have a smaller geographic area and would need to be stitched together for state-sized models.
However the model from the first maps were decent and made for good practice.
Render of .stl
I made a wee little cookie cutter of the school logo!
I did a test using the laser cutter for the rabbit logo wall decor. Later these will be cut in colored acrylic to match the logo.
Been working a large wall decor of my college’s logo, a running jackrabbit. (GO SDSU!!). The end result will be a 2.5ft by 1.5 ft, 2in thick wall decor. This will be 3D printed using the makerbots. The makerbots only have a build area of 6in x 11in, therefore the piece has been split into 8 different parts. As for attaching them together, I have used dove tail joints hidden underneath. The joints where built with a .2mm gap, which accounted for the plastic shrinking when cooling. The joints worked great, we cant get the rabbit apart! Will have pictures of the printed rabbit soon!
where the rabbit was cut