Hello, new here.

I noticed that http://www.blackstripes.nl is open source, and i really like their render technique with cross hatching. (updated the old link..typo)

Example images:

(Source: blackstripes.nl)

(Source: Jeroen Flickr https://www.flickr.com/photos/fotoboer/7982456930)

Open source code:
https://github.com/fullscreennl/blackstripes

Anyhow, have anyone tested/ported their open source code/renderer to a polargraph?

I took a quick look and it seems as if the output from their python script was a .bin image, and that is maybe not the most useful output for a polargraph?

Or, maybe this render technique already exist for polargraph (without me knowing it) ? Please let me know if this is the case 🙂

cheers/Goran

I implemented a blackstripes like effect in the pen plotter controller I wrote. While the program does not communicate with the polargraph firmware. You can export the image to a gcode file, then rename the file to end in .g or .gco and import it into the polargraph controller. A little round about but gets the effect you are after.

Here is a screen shot

Annoying, can't seem to get the Gcode from Penplotter to import into Polargraph controller, says it has imported x amount of lines but nothing shows up. Any ideas?

Quote from rolexbene on March 12, 2016, 18:07
Annoying, can't seem to get the Gcode from Penplotter to import into Polargraph controller, says it has imported x amount of lines but nothing shows up. Any ideas?

I seem to have lots of problems with importing the Gcode too.

It does seem to parse the files outputted from your lovely application, but it spits out a lot of communication errors with the G0 and G1 commands. The first line of output (the file path in brackets and machine geometry) seem to get skipped.

It seems as though the polargraph controller can't deal with G code commands other than G0 and G1. http://www.polargraph.co.uk/2015/05/g-code-importing-and-a-bit-of-calibration-help-controller-v1-2/ Sandy says here that it interprets Z axis values for servo lifts, but that's unlikely to be the source of falling over.

Have you ever got your code to run through the polargraph controller? I'm thinking of using a Pi with the lightweight server to run the Black Stripes-esque G code through, that way I don't have to keep my laptop literally hanging off the end of a desk.

Doh. That's *exactly* what I did. You're a total boss Kong. Polargraph no.2 is now happily churning away.

As the error says, you need libraries installed in your processing libraries directory.
From Rick's instructions:

#Compiling The controller can be compiled in processing 2 or 3 just download the source files and open PenPlotter.pde in processing. The code is dependent of the controlP5, geomerative and toxi libraries go to the processing sketch import library menu to import them before compiling, or they can be added manually by downloading the libraries.zip file from the releases tab and unziping in the processing libraries directory.