Nikki Denso NPSA-202MU Servo Drive

The NPSA‑202MU is an AC servo drive from Nikki Denso designed for high‑precision motion control in industrial CNC and automation systems. Common failure modes for this class of drives include power supply degradation (over‑voltage, ripple), overheating of the IGBT modules, phase winding faults, and encoder interface errors that trigger protection shutdowns. Initial troubleshooting should verify the input voltage and filter capacitor condition, inspect the drive’s heat sink and cooling fan for proper airflow, and review any fault codes or diagnostic LEDs displayed on the front panel.[oss-gpt-20b]

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