Mori Seiki Ex Alarm List ((top)) Jun 2026

The thermal relay for the coolant pump has tripped. This happens if the pump impeller is jammed with chips or if the motor winding is failing. 2. Door Interlock and Safety Alarms

– The actual spindle RPM deviates significantly from the programmed speed, often due to excessive load or parameter errors. Hydraulic & Lubrication Alarms

Spindle faults often combine an EX code on the CRT screen with a hardware digit display on the amplifier module inside the electrical cabinet. Mori Seiki Alarm Codes Overview | PDF - Scribd

The main hydraulic power unit (HPU) pressure dropped below the safe threshold required to operate the chuck, tailstock, or turret.

: The actual spindle speed does not match the commanded speed. mori seiki ex alarm list

He peered into the gloom. There, wedged between the chain link and the guide rail, was a tiny, shattered ceramic chip from a broken milling insert. It was smaller than a grain of rice, but to a servo drive expecting perfect torque curves, it was a boulder. The machine hadn't crashed because Hiro had done anything wrong. It had crashed because a previous operator had ignored a dull tool, the insert had shattered, and the shrapnel had found a home in the magazine's heart.

A massive percentage of EX errors are caused by chips, sludge, or coolant interfering with proximity sensors. Locate the sensor associated with the fault (e.g., chuck clamped sensor, turret clamp sensor), clean it thoroughly, and verify if the built-in LED indicator changes state when metal passes in front of it. How to Prevent Frequent EX Alarms

Select the softkey, then choose [PMCDGN] and [STATUS] .

If the alarm remains latched, perform a or cycle the machine control power (off and on). Preventive Maintenance to Reduce EX Alarms The thermal relay for the coolant pump has tripped

Wipe down door interlock keys and proximity switches to prevent chip build-up. Check way-lube and hydraulic fluid levels before turning on the spindle.

The vast majority of EX alarms are preventable. Implement these routines to keep your shop running smoothly:

Refill the way lube tank immediately. If full, check for a broken lube line causing a pressure leak, or a faulty pressure switch. EX0201 - Coolant Level Low

– Way-lube tank is low; refill the reservoir to clear the alarm. 🔍 Troubleshooting Steps Check the Message: Door Interlock and Safety Alarms – The actual

The NL series often includes alarms for sub-spindle and live tooling.

Usually indicates an overload in a motor (spindle, coolant pump, or hydraulic motor). Check the circuit breakers/overload relays in the electrical cabinet. EX0002 (Emergency Stop):

– The turret failed to complete its rotation within the allotted time; often caused by mechanical obstruction or sensor failure. EX0374/0375: Tool Life Up – Pre-set tool life count has reached its limit. Spindle & Motor Alarms Spindle Drive Unit Alarm – A fault has occurred in the spindle amplifier or drive. Spindle Orientation Time Up

Turret indexes must be perfectly precise. Any misalignment triggers an external alarm.

The Mori Seiki EX alarm list is not a nuisance—it is a . Each EX code points directly to a sensor, a logic condition, or an operator action that needs attention. By understanding the most common codes (EX1001 to EX1052) and how to systematically troubleshoot them, you can reduce average repair time from hours to minutes.