| Alarm Code | Probable Cause | Immediate Action | | :--- | :--- | :--- | | | Front door open during cycle | Close door. Check door switch (24V signal). | | EX1002 | Chuck interlock violation (chuck open allowed? ) | Verify chuck pressure switch; check draw tube sensor. | | EX1020 | Emergency stop button active | Twist to release. Check E-stop chain for broken wire. | | EX1033 | Chuck clamp confirmation failure (part unclamped) | Adjust proximity switch for chuck jaws. |
To fix an EX alarm, you first must understand what it is. When your Mori Seiki machine displays an alarm beginning with the letters "EX," it signals an issue detected by the machine's Programmable Logic Controller (PLC). These alarms are distinct from "NC alarms," which relate to the numerical control (Fanuc, Mitsubishi, etc.) or general programming errors.
– The oil level in the lubrication tank is low and needs to be refilled. mori seiki ex alarm list
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: If the alarm message is vague, seasoned operators use the NC Ladder screen to find the specific bit (e.g., an X-input or R-bit) triggering the alarm. This tells you exactly which sensor or switch the machine is waiting for. | Alarm Code | Probable Cause | Immediate
Despite its utility, the EX Alarm List is not infallible. Several challenges exist:
These alarms often indicate a problem with the drive itself, the motor, or feedback systems. They are among the most critical as they directly impact machining operations. ) | Verify chuck pressure switch; check draw tube sensor
Machining environments are highly volatile. Fine metal chips and heavy coolant spray frequently coat proximity switches (on the chuck, doors, and tool changers), causing false EX alarms. A quick spray of cleaner or a wipe down fixes a massive percentage of these errors. Summary Table: Quick Reference EX Alarm Code Common Meaning Primary Action EX0001 Door Interlock Error Clean door switch; ensure fully closed. EX0015 External Emergency Stop Reset all E-stops on machine & accessories. EX0151 Hydraulic Pressure Down Check hydraulic oil level and pump gauge. EX0170 Way Lube Low / Fault Refill way lubricant reservoir. EX0201 Coolant Level Low Add coolant; check float sensor for chip buildup. EX0310 Chuck Unclamp Fault Adjust actuator proximity switches; check stroke. EX0520 Turret Index Error Check for mechanical obstruction or low hydraulics. If you want to isolate a specific code, let me know: The exact EX alarm number showing on your screen
Cycle start was pressed while the door interlock key switch is activated (bypassed). Turn the safety key switch to "Enabled". Turret & Tooling Alarms (Lathes)
: For transient errors, especially after a battery change (see EX2562 ), you may need to reset the home position via parameters (often Parameter 1815 for Fanuc-based Mori machines). Why "EX" Alarms Matter
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