The Mori Seiki EX series (now DMG MORI EX) are high-performance CNC turning centers known for rigidity, accuracy, and productivity in metalworking. The alarm (error) system on these machines provides numeric and sometimes alphanumeric codes that indicate faults in drives, spindle, axes, probes, I/O, PLC, servo, following errors, temperature, encoder issues, and safety/interlocks. Correct interpretation of alarms is critical for safe, fast troubleshooting and minimizing downtime.
EX0491: SPINDLE SPEED ABNORMAL – The actual spindle RPM deviates significantly from the programmed speed, often due to excessive load or parameter errors. Hydraulic & Lubrication Alarms
Triggered when an E-stop button is pressed or there is a fault in the E-stop circuit. EX0151 (Coolant Level Low): mori seiki ex alarm list
Check the Message: On the MAPPS or Fanuc screen, press the [MESSAGE] or [ALARM] hard key. EX alarms usually provide a text string (e.g., EX0501 LUBRICATION PRESSURE LOW).
Alarm: 9001 / EMERGENCY STOP
: 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
If EX1011 LUBRICATION PRESSURE LOW happens every Monday morning, the lube pump may be losing prime over weekends. Install a check valve or run a lubrication cycle (M70) on startup. Mori Seiki (DMG MORI) EX Series — Alarm
Common Mori Seiki Ex Alarms
The Mori Seiki EX series (now DMG MORI EX) are high-performance CNC turning centers known for rigidity, accuracy, and productivity in metalworking. The alarm (error) system on these machines provides numeric and sometimes alphanumeric codes that indicate faults in drives, spindle, axes, probes, I/O, PLC, servo, following errors, temperature, encoder issues, and safety/interlocks. Correct interpretation of alarms is critical for safe, fast troubleshooting and minimizing downtime.
EX0491: SPINDLE SPEED ABNORMAL – The actual spindle RPM deviates significantly from the programmed speed, often due to excessive load or parameter errors. Hydraulic & Lubrication Alarms
Triggered when an E-stop button is pressed or there is a fault in the E-stop circuit. EX0151 (Coolant Level Low):
Check the Message: On the MAPPS or Fanuc screen, press the [MESSAGE] or [ALARM] hard key. EX alarms usually provide a text string (e.g., EX0501 LUBRICATION PRESSURE LOW).
Alarm: 9001 / EMERGENCY STOP
: 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
If EX1011 LUBRICATION PRESSURE LOW happens every Monday morning, the lube pump may be losing prime over weekends. Install a check valve or run a lubrication cycle (M70) on startup.
Common Mori Seiki Ex Alarms
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