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grbl
An open source, embedded, high performance g-code-parser and CNC milling controller written in optimized C that will run on a straight Arduino (by gnea)
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
This may not be a fit, but it may give you ideas for prototyping/software dev. I have prototyped various CNC/optical/medical projects using GRBL GitHub and a simple benchtop frame-gantry setup that I made from 80/20 and steppers.
NOTE:
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Hence, a higher number means a more popular project.