Fanuc A06B-6064-C322 Board with drive unit

The Fanuc A06B‑6064‑C322 is an AC spindle servo drive base unit (SP 22S) used in CNC machines; it supplies the motor with controlled voltage and current but does not include the control PCB’s. Common failure points for this class of drives are overheating or burnt MOSFETs/IGBTs, capacitor degradation, phase‑to‑phase short circuits, and fan or cooling system failure. First‑check diagnostics: verify that the supply voltage is within spec and stable; inspect the drive for obvious signs of thermal damage or blown components; confirm that the motor’s back‑EMF and torque curves are normal by reviewing any error codes or spindle speed logs.[oss-gpt-20b]

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