After desmantling several large office printers a few years ago I've been sitting on a heap of odd steppers, servos, belts etc.
I have a running polargraph going with some minor changes to suit the following hardware:
CNC Shield v3
2 x A4988 drivers
Generic 5v stepper
I fluffed around and have included a 'pen down/up' and indicator which doubles as control for a solenoid to do the lifting. Solenoid means substantially quicker transitions between pen up/pen down making the drawing process quicker. I'm still waiting on a 5v solenoid from China to finalise the gondola. My end goal is to have this scaleable and to run it at the local pop-up galleries and to do some cooler stuff with interchangeable gondolas and to try and figure out how to use gCode tool paths and pocketing to colour in my SVGs.
The software offered up a ton of problems in the start as I found a lot of the tutorials easy enough to follow but (for me) failed to have enough of the 'why' behind things and it was also the first time I'd touched java/processing.
I want to do more and have ordered an Arduino Mega, prototype shield and a 3.5" touch tft to suit. Hopefully I'll be able to get it all working.
I have a question - is anyone sitting on some notes or a guide to making a 'custom' Polargraph SD to use whatever step/dir/enable pins, lcd pins etc?
Also, when using the mega tethered to a pc via USB, are the extra mega functions available? (Norwegian, circular etc).
Probably enough for now - time to get the kids from school! Happy graphing...