Four color, geometric Eggbot plot

by dnewman, published

Four color, geometric Eggbot plot by dnewman Jan 27, 2011



Public Domain
Four color, geometric Eggbot plot by dnewman is licensed under the Public Domain license.

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This is a four color geometric pattern for plotting on eggs with the Eggbot. The SVG drawing has a height of 800 pixels and has an aspect ratio appropriate for plotting on eggs. To adjust for plotting on spheres, rescale the vertical size to a height of 1200 pixels. Then remove rows so as to obtain the desired vertical height (e.g., 1000 pixels).

Plotting this drawing successfully requires a high degree of plotting accuracy (e.g., to prevent unwanted registration problems). So, be sure to carefully load your egg with the correct tension.

The included Python file is the Python code to generate the basic drawing with dimensions 1200 x 3200. In Inkscape, I then rescaled the vertical dimension by 63.333% so as to get an aspect ratio suitable for drawing on eggs. (66.666% might seem more apropos, but I wanted to be a tad shorter than 800 pixels and hence 63.3333%)


To aid in framing the drawing on your egg, layer "1 - test" has two short horizontal lines at y=800 and y=0.
The four remaining layers each contain a single color: 2 - yellow, 3 - orange, 4 - turquoise, and 5 - magenta.

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I just got my egg bot for Christmas and a little confused. Maybe there is an easy way to explain layering for this old woman to understand I hope. I would love to do this pattern.

Many programs for drawing computer graphics have a concept of "layers" in which you place different parts of your drawing into different conceptual layers. They are best likened to drawing on transparent sheets of paper. You can then stack them atop of each other and see the overall drawing. You can take a sheet (layer) and move it to the bottom of the stack so that it appears underneath/below the other sheets. The sheets above it will occlude some or all of it. Or, you can take a sheet at the bottom and move it above (in front of) other sheets.

How different programs effect this layering may be different, but in all cases it is pretty much used for the same purposes. The drawing file here (cubes-color.svg) uses Inkscape's method of representing layers and storing that information in the drawing file. If you open the file in Inkscape, y
ou can make individual layers invisible by playing with the layer controls (which appear along the bottom of the Inkscape window and to the left). More importantly, the Eggbot Control extension understands and uses the same layering method. If you use the Eggbot Control extension's "layer" tab, yo
u can draw just a single layer (1, 2, 3, 4, or 5 in this case). This allows you to draw each layer with a separate color. Put a yellow pen into the bot, use the Layer tab, type "2" into the input field, and then click "Apply" and just layer 2 will be drawn. Then put in an orange pen, type "3" in
the field of the Layer tab, and then click apply, and just layer 3 will be drawn. Etc.

P.S. Actually, it's any layer whose name starts with "2" which will be drawn: so a layer named "222" would be drawn as well.

how long does it take to print something like that. I have been looking into getting an eggbot. looks pretty fun but really expensive for what it is, (compared to a makerbot anyway)

I'm late responding to this discussion, but wanted to say that I think Eggbot is certainly worth the price, at least from the perspective of somebody who comes from a traditional East European egg decorating background.

I really appreciate the fact that D. Newman shares his designs. I found one of his designs particularly interesting and have yet to exhaust the possibilities that follow from that one design. I had originally drawn it using Sharpies, but am now planning to draw it using pencil so that I can then
use it as a stencil for a more traditional kistka
amp; wax coloring.

Thanks for the kind words. What I enjoy most about sharing designs is seeing where other people take them -- what they do with them. I look forward to seeing where you take them!

Three minutes or so to set up and frame. Then 34 minutes (at the speeds I use) to plot the four colors, including my manually changing out the pens. More specifically, I draw the yellow at a slower speed than the other colors so that I get good saturation. And, there's more yellow rhombuses than for any of the other colors as well. It ends up being 8 minutes apiece for three of the colors and about 10 minutes for the yellow.

Simpler plots of course draw much faster. And, if the plot does not demand a high degree of precision, you can let the plot go faster.

P.S. By much "faster", I mean in the neighborhood of 5 minutes or less. That is, a lot of the plots I draw have far fewer pen-up-pen-down operations and consequently draw much, much faster. This plot and the other complex geometric design I posted have lots of pen up/pen down operations and I take the pen downs fairly slowly (to be kind to my pen tips). Hence the much longer than typical drawing times.