The Yaskawa SGMG‑20A2A is a 1.8 kW (≈2 HP) AC servo motor rated at 200 V and 1500 RPM with an 8192 P/R incremental encoder, commonly used in CNC and factory automation. Common failure points for this class include insulation breakdown of the stator windings, bearing wear or misalignment, encoder signal loss, and overheating due to inadequate cooling or over‑current conditions. First‑check diagnostics should verify that the motor is receiving correct supply voltage and current limits, inspect the encoder wiring for continuity and proper grounding, and review any drive error codes (e.g., over‑temperature, phase imbalance) before proceeding with deeper mechanical or electrical testing.[oss-gpt-20b]