FANUC Series 0i-F Maintenance and Troubleshooting

6.2 Built in backup operation

By utilizing the 'Built In Backup' feature, SRAM data can be manually or periodically backed up automatically to flash memory. Operation steps:

Press the [SYSTEM] key → [DATA] → [BACK UP].

Select 'BACK UP TO FLASH'.

Wait for completion (approximately a few seconds).

Select 'ORE FROM FLASH' during recovery.

It is recommended to perform a manual backup after each parameter or program modification. The system will also automatically backup when shutting down (some versions).

6.3 Remote Monitoring and Diagnosis

The 100M Ethernet port of 0i-F supports remote access. By installing FANUC's "ROBOSHOT" or third-party monitoring software, you can:

Real time viewing of machine tool status and alarm history.

Upload/download programs.

Perform remote fault diagnosis. FANUC experts can dial in for assistance, pay attention to network security settings such as IP filtering VLAN）。

Energy saving optimization settings and fault correlation

7.1 ECO mode setting causes weak spindle acceleration

Phenomenon:

After enabling ECO energy-saving mode, the spindle acceleration is slow and even cannot reach the set speed.

Reason:

ECO level (parameters 12110~12113) limits the spindle acceleration torque. For example, when ECO=1, the maximum torque limit is 80% of the normal value. If full torque is required for processing, it will appear weak.

solve:

Adjust the ECO level according to the actual processing load. Check the current power consumption in the ECO monitoring screen, and if the torque frequently reaches the limit, reduce the ECO level (set to 0). Logic can also be written in PMC to automatically disable ECO during heavy cutting.

7.2 Energy feedback unit malfunction

Phenomenon:

When the machine tool decelerates, the power module emits an abnormal sound or alarms "PSM ALARM 01" (overvoltage).

Reason:

The energy feedback unit (regenerative discharge circuit) fails, and the braking energy cannot be fed back to the grid, resulting in an increase in DC link voltage. The common reasons are open circuit of discharge resistor or damage of feedback IGBT module.

handle:

Immediately stop the machine and check the regeneration resistor wiring and resistance on the amplifier PSM (normally should be several tens of ohms). If the resistor burns out, replace it with a resistor of the same specification. If the feedback circuit is damaged, the PSM module needs to be replaced.

NCGuide simulation assisted troubleshooting

NCGuide is FANUC's PC simulation software that can simulate real 0i-F operating environments. When troubleshooting, it can:

Offline verification program: Copy suspicious programs on the machine tool to run in NCGuide, observe whether the same alarm occurs, and determine whether it is a program problem or a hardware problem.

Simulation parameter modification effect: Modify servo parameters in the simulator, observe the response curve, and avoid taking risks on real machine tools.

Train new employees to practice troubleshooting processes without occupying machine tools.

It is recommended that each maintenance department equip a laptop with NCGuide and a CF card reader to significantly reduce diagnostic time.

Collision protection and recovery

0i-F provides two collision protection mechanisms:

Torque disturbance control: Set the upper limit of torque for each axis (parameters 1820~1825). When the actual torque exceeds the limit and changes dramatically, the system determines a collision and automatically stops the shaft or performs a rollback action. Attention: This function requires the correct setting of the load inertia ratio, otherwise it may malfunction.

Interference Check: Used for double turret or multi spindle machine tools. Define a safe zone between two cutting tools, and when they enter the restricted area, the system will stop in advance and sound an alarm.

Recovery steps after collision:

Record the alarm code.

Use the handwheel or JOG mode to move the shaft out of the collision position, and pay attention to checking whether the guide rail and screw are damaged.

Reset the reference point (for absolute encoders, switch to parameter 1815 # 4).

Check for tool deviation and workpiece offset, and re align the tool if necessary.

Run an empty program and listen for any abnormal sounds.