Mori Seiki Ex | Alarm List [new]
1. Adjust the tailstock forward position switch.2. Verify adequate hydraulic pressure to the tailstock system.3. Check the safety parameter settings for the tailstock. CHIP CONVEYOR OVERLOAD
An (PLC alarm) is the machine builder's direct message about a physical or electrical condition specific to that Mori Seiki (now DMG MORI) machine. This could be a door that's not closed, a hydraulic unit that's lost pressure, a tool changer that's jammed, or a safety interlock that's been triggered. Understanding this distinction is the first step toward rapid, effective diagnosis.
The turret failed to rotate and lock into the next tool position within the allowed time.
Natural evaporation/consumption, or a stuck float switch in the coolant tank. EX0005: Hydraulic Oil Pressure Drop Meaning: The main hydraulic unit has lost pressure. mori seiki ex alarm list
If you are an electrician or field service engineer, the EX alarm list is a goldmine.
These alarms prevent mechanical crashes when axes move beyond their safe operating envelopes. Meaning: An axis has hit a physical hard limit switch.
The control detects that the front operator door is open during a cycle, or the safety switch is malfunctioning. Check the safety parameter settings for the tailstock
The way lube pressure did not reach the required threshold during a lubrication cycle.
While the core logic remains, the user interface and some alarm messages have evolved with the company. Original machines (pre-2010s) often use the MAPPS interface with Fanuc controls and have the alarm structure documented here. DMG MORI machines use more advanced interfaces like CELOS, but they still generate EX alarms from the underlying PLC logic. When troubleshooting, focus on the EX code itself; the fundamental problem (low hydraulic pressure, door interlock fault, etc.) is often the same regardless of the machine's generation.
If the alarm is a safety or interlock issue, you may need to cycle the operator door or cycle the main power breaker to reset the safety relay module. Preventive Maintenance to Reduce EX Alarms Understanding this distinction is the first step toward
– Indicates a fault within the spindle amplifier or drive circuitry.
The tailstock body or quill is in an unsafe zone relative to the turret, or the tailstock pressure is inadequate.