1. Ensure the workpiece is properly clamped.2. Check the chuck clamp foot pedal or M-code status.3. Verify proximity switch adjustments on the hydraulic cylinder actuator. FRONT DOOR OPEN
Verify tailstock fluid levels. Ensure the tailstock forward/backward limit switches are clean and functioning. EX0300 to EX0399: Turret and Tool Changer (ATC) Alarms
Mori Seiki (now DMG MORI) machines, particularly those in the EX series, are known for their robust design and precision. However, when an "EX" alarm appears, it can halt production. Unlike Fanuc system alarms (like 401 or 414), EX alarms are , often indicating a machine-specific issue (PLC/Ladder logic) rather than a pure CNC servo fault.
Do you need help finding the (way lube/hydraulics) for Mori Seiki machines? Share public link mori seiki ex alarm list
They usually point to sensors, switches, fluid levels, or mechanical obstructions.
Among the various error codes on Mori Seiki machines—such as NC alarms or spindle alarms—the are some of the most common. Understanding how to read, diagnose, and resolve these specific codes is critical to minimizing downtime and maintaining high production efficiency. What Are Mori Seiki EX Alarms?
Cross-reference your machine’s manual to see which specific physical switch corresponds to the failing PMC bit. Step 3: Inspect Physical Switches and Sensors EX0300 to EX0399: Turret and Tool Changer (ATC)
While you should always consult the specific wiring diagrams and ladder manuals for your exact machine serial number, the following list represents the most frequently encountered EX alarms across Mori Seiki platforms. 1. Fluid, Pressure, and Lubrication Alarms
Lack of oil or pressure in the tailstock movement system.
Mori Seiki CNC machines are famous for their reliability and precision. However, when an EX alarm appears on your MSG or MAPPS control panel, production grinds to a halt. Unlike NC alarms (which relate to core Fanuc or Mitsubishi control system faults), EX alarms are external system alarms defined by Mori Seiki. They signal issues with the machine's peripheral hardware, safety switches, fluid levels, and mechanical systems. Understanding how to read
| Alarm Code | Description | Probable Cause & Solution | | :--- | :--- | :--- | | | Hydraulic Motor Overload | The hydraulic pump motor drew too much current. • Check the hydraulic oil level (is it low?). • Check for clogged suction filters. • Check the thermal breaker in the electrical cabinet. | | E003 | Hydraulic Pressure Drop | System pressure dropped below the set threshold while the pump was running. • Check for leaks in the lines. • Check the pressure switch setting. • Pump may be worn out. | | E004 | Lubrication Oil Low | The way lube reservoir is empty. • Refill the way oil (typically Mobil Vactra #2). • Check the float switch if the tank is full but the alarm persists. | | E005 | Lubrication Cycle Error | The system did not detect a pressure rise during the lube cycle. • Check if the lubrication pump is working. • Check for blocked lines or a broken distributor block. |
Clean or replace the filters on the electrical cabinet doors and hydraulic heat exchangers. Electrical Integrity