Step 2: Set Up Material/ Home the Water Jet/ SCORE!

Again, without going into too much software detail; home the waterjet to machine home, and get your first file loaded.  

You'll want to score before cutting, to keep the work holding simple.  Place bean bags around the edges of your material and run the jet around the outer perimeter of where your cuts will be made to ensure there won't be any conflict.

Material Setup:  This is very important for scoring, because this is how the water jet software calculates the speed at which the jet will move to scribe.  This information gets entered into the software menu when you load your paths.

I used 12 gauge mild steel for this example which is generally too thick to use with our sheet metal equipment at TechShop, but works fine after being scored.

Once everything is set up, it's time to score.  For steel, garnet abrasive is essential or you won't get enough depth in your cut; for aluminum, turn the abrasive off or the waterjet will probably cut through too much.

Scoring is loud and intense!  The water will shoot off the surface of the material and it's very important to set up all the shields to prevent the thorough drenching of our metal shop.  

<p>software where?</p>
Really cool project. Definitely an inspiration for me on these: <br> <br>http://www.flickr.com/photos/51533239@N05/7135814631/ <br> <br>I am wondering how &quot;scribe mode&quot; results compare with other techniques. Am not sure if i have this right, but does &quot;scribe mode&quot; use normal high pressure and abrasive but just goes really fast so it doesnt actually pierce the metal? <br> <br>On my polyhedra, i scored the metal using low pressure mode (on the console right near the green button to boot up the pump) plus abrasive and low (20%) speed. I measured the depth of scoring with calipers and got down to about half way through 16ga mild steel. <br> <br>Frankly, i'd prefer to score even deeper than half way. The &quot;old fashioned&quot; methods of working these objects into their final forms can be daunting. Deeper scoring would make the final bending easier. <br> <br>I guess i should also just try thinner metal. <br> <br>The tetrahedron came together easy enough, but the higer order polyhedra are harder. The dodecahedron was right at the limit of my ability and required some work with flame and hammer blows to get fully into shape. Havent yet got out the hammer and tongs for the icosahedron. <br> <br>Anyway, really cool project. Thanks for the inspiration.
From the Copyright on the PDFs it appears that you found them here:<br>Copyright &copy; 1998-2008 Gijs Korthals Altes www.korthalsaltes.com<br>There is a huge selection of polyhedra on that site. A fun site that has polyhedra made from intriguing various materials and that is fun to visit is this one: http://momath.org/home/math-monday/
I would love to have a water jet. :(
Me too! It's only because I work at TechShop that I have access to one. We're a membership based workshop where we teach people how to use all kinds of machines and tools, and then give our members access to them for their projects.

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