Welty‑Way Shear Controller is an industrial control unit that regulates the shear blade position and speed through programmable PID loops and real‑time monitoring of load cells and motor currents. Common failure modes include burned or tripped MOSFETs in the drive stage, degraded capacitors on the power supply board, and corrupted firmware leading to stuck “fault” LEDs or erratic setpoint behavior. For troubleshooting, first verify that the 48 VDC input is within spec and that the main motor driver current limits are not being exceeded; next check all I/O connections for loose contacts or burnt pins, especially on the torque sensor and blade position encoder; finally review any stored error codes via the controller’s diagnostic interface to pinpoint a specific component fault.[oss-gpt-20b]