While writing finer control software for the Drawbot I discovered an previously undetected issue with the driver board. It took me a couple of days to isolate and fix the issue, but once I nailed that down the bot really started behaving well. This video shows it with its intended control scheme implemented. There's a Python application running on my pc which communicates drawing commands over the Arduino's USB-serial interface. The Python app calculates an 8 deep Hilbert curve, and translates it into the appropriate drawing commands. The legs of the curve are about 1/4 of an inch long, and have 32 steps each, making the overall resolution of the bot about 128 dpi. Not too shabby for about $65.00 in parts - including the cost of the Arduino.