With the UK Maker Faire just days away I had to concede and cut my loses. Donkey Kong just wasn't going to be finished in time and to an acceptable standard, so I had to make the decision not to take it as a half built project to the Maker Faire. I still want to take something interactive though so I needed to make a new project. The new project is a CNC controlled ball bearing rolling round a maze. The XY frame is taken from my old 3020 (the one that caught fire) and is driven by some hefty stepper drivers from my old CNC mill. A couple of magnets are placed on top of the machine and a ball bearing on top of a sheet of mdf. Sure it's only a flat maze but there is a reason for that, the whole thing is driven from an arduino and I'm going to let people program the arduino to drive it round the maze. I wrote a small application that converts a command string sent via the serial port into a series of movements. N10, E20 etc. Simple enough to pick up quickly. Multipl...