Sunday, 1st March 2026
How a VLA Controls a Robot Arm: GR00T N1.5 System Architecture from Camera to Motor
I built a robot arm system that uses NVIDIA’s GR00T N1.5, a Vision-Language-Action (VLA) model. The system picks up objects from a table with only a camera, natural language instructions, and 50 demonstration episodes. After it worked end-to-end, I wanted to record the full system architecture for anyone who wants to understand how all the pieces connect.
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