CD Hub Clamp

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I am sharing a 2-part hub that mounts a standard CD or DVD on a 5 mm shaft. It includes STL and OpenSCAD files for a 3- and 4-spoke version, allowing you to adjust the diameter or number of spokes as needed. The file is optimized for my Ultimaker 2 printer but may require adjustments for other printers to achieve a tight fit. I also used superglue in its construction. I designed this hub because I am using a DVD as a round shape mounted on a stepper motor shaft, with an optical mouse observing a strip of paper wrapped around the rim as a shaft encoder. This setup allows me to measure the rotation angle and calibrate a microstepping driver. The Python code for reading data from a USB mouse is also included, compatible with Debian Linux. My mouse exhibits some drift over time, making it unsuitable for absolute angle encoding, but sufficient for my purposes.