I have been meaning to do this for quite some time, and just the other day I finally used the ShopBot Alpha
at TechShop San Jose to plot a vectorized San Jose Sharks logo that I made using Illustrator.
The process is fairly simple
here's how I did it....

I used:

Adobe Illustrator
VCarve Pro
ShopBot Alpha
Blue painters tape
and some homemade paper =)

Step 1: Vectors, Vectors, VECTORS!!!

First off, you need a vector file in order to plot. Using Illustrator (or CorelDRAW, Inkscape, VCarve itself, AutoCAD.... etc. pick your favorite CAD/vector art program) make a file that you want to plot.
<p>Also since this is really 2-dimensional in all regards, could it be done from a 2-D program like Inkscape directly, or perhaps from C-code directly, e.g. write a C program to define a mathematical function and plot it directly in realtime without having to use any software in between.</p><p>Need to figure out the communication protocol of the Shopbot....</p>
<p>Excellent!</p><p>Do you need to gradually adjust as the Sharpie wears out a bit?</p><p>I imagine on larger jobs it might wear a little, and need to be lowered a little more toward the end of the job.</p>
Widget works makes a sharpie plotter pen to go in any coc machine
thats cool, but I have plans to make my own ;) future Instructable =)
<p>Did you ever make your own? Can you share if so? I have the Widget Works one but its for sharpies that are discontinued.</p>
Nice shoes...
Draw me like one of your French... robots.

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