Step-by-Step Troubleshooting Framework for Mori Seiki EX Alarms
Fill the coolant tank with a proper water-soluble oil mixture. Clean any sludge or chip build-up away from the float switch so it moves freely. EX0451: Chip Conveyor Overload
On Mori Seiki machines, alarms are generally split into internal control alarms (such as Fanuc system errors) and external alarms. are External/Machine-Side Alarms .
What the machine was doing exactly when it faulted (e.g., changing tools, rapid moving, starting the spindle). The specific block of G-code on the execution screen. Step 2: Perform Visual and Physical Checks Many EX alarms are caused by simple physical discrepancies:
The turret took too long to rotate to the next tool station. This can be caused by a mechanical jam, heavy tool unbalance, or a failing indexing motor. mori seiki ex alarm list
Before diving into the list, it helps to understand how Mori Seiki classifies its errors:
Clean the drawbar proximity switches located at the top of the spindle motor assembly. Verify that the pneumatic/hydraulic unclamp cylinder is getting enough pressure to fully push the drawbar down. EX0900 / EX900: Chip Conveyor Overload
I can provide the specific diagnostic parameters, keep relays, or sensor adjustments needed to clear that exact fault. Share public link
– Indicates a fault within the spindle amplifier or drive circuitry. are External/Machine-Side Alarms
The main coolant tank is running low on water/soluble oil mixture. Refilling the tank usually clears this alarm instantly.
Main hydraulic system pressure has fallen below safe operating limits.
The turret took too long to unclamp, rotate, or clamp during a tool change.
The machine door is not closed or the interlock sensor is not engaged while attempting a cycle. Where to Find Your Specific Alarm Step 2: Perform Visual and Physical Checks Many
| 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 the safety switch assembly. Replace the door interlock switch if internal contacts are failing. 4. Chuck, Tailstock, and Fixture Alarms (EX0600 - EX0799)
Hydraulic pressure dropped below the safe operating limit (usually required for chucking, tailstock, and tool unclamp).
Look at the status display screens (often denoted as X signals for inputs and Y signals for outputs).