The Welty‑Way AS 190 Shear Controller is a programmable drive unit that regulates speed, torque, and timing for industrial shearing machines. Common failure modes in this class of controllers include power supply degradation (over‑voltage or ripple), I/O module faults (shorts or open circuits), firmware corruption, and overheating of the main driver IC due to inadequate cooling. For initial troubleshooting, verify that the input voltage is within spec and check for any visible signs of component damage; inspect all I/O connectors for loose contacts or corrosion; then review the controller’s diagnostic LEDs or error logs for fault codes indicating drive or communication issues.[oss-gpt-20b]