Kenji sighed. He’d seen this before. The operator, a kid named Hiro, was pale as a ghost. "I swear, Tanaka-san," Hiro stammered, "I zero-returned everything. The tool changer arm was clear. It just… screamed."
Turret alarms occur during index cycles, often due to mechanical jams or misaligned rotational sensors.
Every Mori Seiki machine is shipped with a "Maintenance Manual" or "Ladder Diagram" specific to its serial number. You can find digital versions or parts lists through Scribd or the DMG MORI Service Portal .
These codes typically trigger when the machine's safety guard system detects an unsafe operating condition. mori seiki ex alarm list
When an EX alarm occurs, the machine is usually safeguarding itself from potential damage or an unsafe condition, preventing a cycle from starting or stopping the current operation.
Cannot start spindle, cannot run program. Troubleshooting:
Imagine your machine tool is a living organism. The "EX" alarm is its nervous system—a signal from the Programmable Logic Controller (PLC) that something is out of balance. For any machinist, operator, or maintenance technician, the sudden appearance of an "EX" code on the control panel can be a moment of intense focus. While numerical control (NC) alarms, like the well-known 401 SERVO ALARM (for an Axis Drive Fault), usually indicate problems with the Fanuc control itself, EX alarms are different. Kenji sighed
: A startup safety check requiring you to cycle the door once to verify the safety circuit. Spindle & Gearbox Alarms
Over 60% of EX alarms are preventable. Follow this monthly checklist:
Before diving into the list, it helps to understand how Mori Seiki classifies its errors: Every Mori Seiki machine is shipped with a
These alarms often relate to configuration, data loss, or specific machine modes.
Need the exact EX alarm list for your specific model? Leave a comment with your machine’s year and control type, and we can narrow down the most common failure points.
Clogged air filters, low chiller fluid, or a bad chiller pump.