Polarsandtisch

[jeffeb3]

I’m sorry, I don’t speak Italian or German, and my Spanish is pretty bad. So I guess we are stuck with google translate. I will try hard to avoid errors in my English.

I will keep trying as long as you do. I’m sure we can figure it out together.

Here is where we created a conversion from “ThetaRho” from sandify to X, Y for a SCARA machine:

"Sandtrails" - a polar sand table

I couldn’t wait. This is just too interesting. First, I am going to again push for using the theta rho output. Just because it has a lot of the same challenges and I’ve solved them in sandfy. 1) I use a ton of vertices to create lines, so you won’t have to. 2) I am keeping track of movements around the circle, and I am outputting the angle in a continuous angle. So when a line goes from quadrant 4 to 1, the angle is greater than 2pi. 3) It makes the math much simpler. I’m going to explain the …

Here is another post, in the same topic. This uses the raspberry pi as the controller, instead of a separate board:

"Sandtrails" - a polar sand table

Hi all, This forum is a treasure trove of beautiful sand tables. Great work, I wish I could see all of them in real life! There are many XY tables, but very few polar ones. The one I saw last fall by Bruce Shapiro was polar. And that’s what I fell in love with. So I looked at Sisyphus’ tables and learned what I could from the pics and videos. I’m sharing my results in the hope that it will bring someone else as much joy in building as it has me. And I’m sure you could all help me greatly in im…

You should be able to run sandify from a pi to create patterns. If you are running it locally, you can also easily make changes for your machine.

There is another program called sandypi. It is brand new, but it should be great for your project. It saves patterns on a raspberry pi and provides a neat interface to choose them.