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TNC Sim

TNC Sim

Learn and simulate Heidenhain CNC programs in 3D

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TNC Sim is a free, open-source simulator for learning and exploring Heidenhain Klartext CNC programming. Write or import a program, inspect its toolpath, and watch the machining process in 3D directly in your browser. It supports common positioning commands, cycles, Q parameters, radius compensation, multiple tool shapes, and interactive lessons. The Android app also works fully offline. Early release—not a substitute for verification on a real machine.

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