Mori Seiki Ex Alarm List Official

Mori Seiki EX Alarm List

Limitations and Common Pitfalls

Part 2: Most Common Mori Seiki EX Alarms (General List)

Best Practices for Using the Mori Seiki EX Alarm List

Mori Seiki EX Alarm Code List | PDF | Switch | Equipment - Scribd

• Servo/Axis alarms — (e.g., axis overload, drive fault, following error, encoder error)
  Symptoms: axis stops, abnormal noises, position loss, jitter.
  Typical causes: mechanical binding, excessive cutting force, incorrect tuning, encoder cable issues, blown drive modules, servo amplifier overload.
• Spindle alarms — (e.g., spindle drive fault, spindle overload, spindle encoder error)
  Symptoms: spindle trips, cannot reach commanded RPM, abnormal vibration.
  Typical causes: spindle motor overheating, bearing failure, encoder/cable faults, brake faults.
• Control/CPU/PLC alarms — (e.g., CPU fault, program memory error, battery low)
  Symptoms: control freeze, program lost, improper I/O behavior.
  Typical causes: SD/CF card corruption, power interruptions, aged battery, firmware issues.
• I/O & peripheral alarms — (e.g., tool turret fault, chuck interlock, loader fault, probe fault)
  Symptoms: tool change fails, gripper/chuck not actuating, probe not triggering.
  Typical causes: sensor failures, pneumatic/hydraulic pressure loss, solenoid or valve faults.
• Tool/turret alarms — (e.g., turret indexing fault, clamp/unclamp fault)
  Symptoms: turret refuses to index, mispositioned tools.
  Typical causes: mechanical jam, broken spline, hydraulic/pneumatic failure, encoder or sensor fault.
• Thermal/temperature alarms — (e.g., coolant pump failure, servo over-temp, spindle over-temp)
  Symptoms: thermal shutdown, warning lights, degraded performance.
  Typical causes: coolant low, clogged filters, failed fans, ambient overheating.
• Safety & door/interlock alarms — (e.g., emergency stop, door open, safety circuit fault)
  Symptoms: immediate machine stop, no movement allowed until cleared.
  Typical causes: E-stop pressed, guard open, safety relay or wiring fault.
• Power supply & electrical alarms — (e.g., encoder power, DC bus low, phase loss)
  Symptoms: sudden trips, inability to power drives.
  Typical causes: mains issues, blown fuses, faulty power modules.
• Communication & network alarms — (e.g., fieldbus errors, parameter mismatch)
  Symptoms: axis/drive unresponsive, external devices not responding.
  Typical causes: cable/connector issues, configuration mismatch, module failure.

: Often indicates that PC spec parameters have been cleared or corrupted. General Troubleshooting Steps Check Physical Conditions : Verify air and hydraulic pressures are stable under load. Inspect Sensors mori seiki ex alarm list

Below is a reference for frequently encountered EX alarm codes found across Mori Seiki lathes and machining centers: Mori Seiki Alarm Codes Overview | PDF - Scribd Mori Seiki EX Alarm List Limitations and Common