GE Vernova Engineer Open-Sources Free Web-Based CNC Machining Calculator

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Li Lu, a machining development engineer at GE Vernova in Singapore with over a decade of CNC experience, has built and open-sourced a free web-based CNC machining calculator. The tool covers six core calculations including spindle speed, feed rate, chip load, cutting speed, material removal rate, and drilling parameters, each derived from clearly stated engineering formulas. Built with modular Python 3.12, the calculator features automated pytest unit tests and GitHub Actions CI to ensure no formula errors reach the live tool. The front end uses plain HTML, CSS, and JavaScript with no frameworks, making it fast to load on shop-floor tablets, and requires no account or login. Lu designed the tool to be fully transparent and auditable, addressing a gap he observed in existing machining apps and paper catalogs used in daily shop-floor work.

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