Giant Wall Drawing Machine

I am so excited about this aspect of my masters project!
I'm building a giant polargraph/ V plotter. Basically a giant wall mounted drawing machine to draw my creepy mannequin drawings with. Because, well, why not? I get to indulge my inner computer nerd self with something other than fixing Linux OS bugs. And I can relate it to my masters project. It fits in really well in terms of my anti factory-ness. I am a one woman factory machine. I've created mannequins and (I'm in the process of creating) cups using methods based on factory mass producing, but on a much smaller scale. No matter how I do things, they never turn out the same even if I use a mold.

After a whole lot of research (and wine) I've found an suitable guide as a starting point. The whole setup is completely open source. Ergo it's no big secret on how the whole thing operates. I've been a huge fan of open source software/projects ever since I spent 3k on a laptop in '07 that ran Windows Vista for an entire month before getting fucked over with a virus of some sort. I've stuck with various versions of Linux ever since and taught myself how to fix bugs in the process.

I'm posting the process of building this polargraph as a way to remember where I got all the parts from and how I managed to pull it off. Also there aren't that many guides out there that my self taught nerd-ness can comprehend.

​Polargraph in action:

Parts List

Ebay:
Arduino Uno Clone Microcontroller + case
L293D Motor Shield Controller (Arduino uno compatible) 
Servo motor 
10m 6mm Timing Belt
2x GT2 gear pulleys
Stepper motor mounts

Nicegear
2 x Stepper Motor - Bipolar, 10V, 0.5 A/Phase (200 Steps/Rev) 

Extra stuff as I don't have it lying around:
2 x Ribbon Crimp Connector
4.5m 10 wire Ribbon Cable
Thermal grease
Heatsinks

TradeMe
Variable voltage power supply

Ponoko.com
Laser cut gondola

I'll update this list as I find the last few things.

Building commences mid December 2015
The goal is to draw far bigger than this image which was printed on A0 paper