The Vexta ASM46MA is a closed‑loop stepper/servo motor built on the Oriental Motor AlphaStep platform, featuring a cast‑iron frame and fan‑cooled double shielding for high‑temperature operation. Common failure points in this class include worn magnetic bearings, degraded gearbox teeth (especially with the 7.2:1 ratio), insulation breakdown between windings, and loss of encoder feedback due to cable wear or connector corrosion. Initial diagnostics should verify that the motor receives correct AC voltage and phase balance, inspect all wiring harnesses for fraying or disconnection, and check the encoder/feedback signal integrity; if a fault code is present, review it against the manufacturer’s error list for guidance on specific component faults.[oss-gpt-20b]