This document presents a portable motor fault analyzer system that can test motors in place. It uses variable frequency drives and servo drives to analyze induction motors and servo motors. Characteristic waveforms from the motors are displayed on a human-machine interface to detect and analyze common faults like overcurrent, overvoltage, and positional errors. The system is comprised of an AC or servo motor, appropriate drive, programmable logic controller to connect the drive and HMI, and an HMI to display the motor waveforms for fault analysis. This allows on-site motor testing without dismantling equipment.