Robot joint communication affects speed, debugging, expansion, and cost. This video compares CAN, CAN FD, and EtherCAT with simple road analogies—CAN for low-cost, moderate-bandwidth robots; CAN FD for higher bandwidth, OTA upgrades, and larger configuration data; EtherCAT for high-axis-count, high-synchronization applications. Choose based on axis count, sync accuracy, and budget.

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