Fanuc 414 Alarm in the End What Is the Meaning Of?
Simply put, Fanuc drive alarm 414 is a servo amplifier in the alarm, it feels that the current, temperature or power out of the wrong. The most common scenarios are:
* The motor suddenly stops and the interface reports 414.
* The LED on the amplifier flashes red.
* Jumping to a stop as soon as the power is turned on for a short time.
Many people confuse this with alarm 410 (overcurrent) or alarm 415 (regenerative overvoltage), but in fact 414 is more of a power supply, overload, or a burned out internal part of the amplifier.
Fanuc 414 Alarm Common Root Causes
I have repaired the machine, 414 is usually these types of problems:
* Power supply instability
Plant voltage fluctuates, or there are problems with the incoming wires.
* Servo amplifier itself is bad
Commonly, the IGBT is burned out, the cooling fan does not turn, the circuit board is black.
* Motor out of order
Short circuit winding, overload, bearing heat. Listen to the motor humming, sometimes the bearing is worn out.
* Loose wiring
Cable aging, plug false connection, alarm when moving.
* Poor heat dissipation
The fan in the cabinet is broken, the dust is thick, the heat can not be dissipated.
* Parameter setting is not right
Some people did not adjust the parameters properly after changing the parts, and the torque and acceleration are set too strong.
* Environmental problems
Summer workshop temperature is high, the electric cabinet accumulates dust, oil mist, the line is easy to moisture short circuit.
My Usual Troubleshooting Steps
This set of procedures is summarized after I "stepped on the pit” countless times in the field, and I would like to share it with you.
1. First power off, to ensure safety
Do not touch with electricity, first shut down the power off and then do it.
2. Measure the power supply
Use a multimeter to measure the input voltage to see if it is in the rated range. Power supply is not stable plant is best to install a voltage regulator or UPS.
3. Look at the servo amplifier
Note the status of the LED lights, the fan does not turn, there is no internal smell of burning. Too much ash on the clear, the fan is bad on the replacement.
4. Check the motor
Removed to measure the insulation, resistance, with the ear to hear whether there is abnormal noise, hand touch is not hot.
5. Check the cable and connector
Plug pulled down and re-inserted tightly, check whether there is blackening, oxidation. Check whether there is any blackening or oxidization. Replace the cable with a new one if it is aging.
6. Confirm the parameters
Servo parameters do not set indiscriminately, if you are not sure, restore the manufacturer's recommended values.
7. Test run
When the problem is not big, run the machine without load for a while and see if the alarm still jumps. If the conditions allow, use
Fanuc test bench to locate the motor or amplifier faster.
8. Replacement or repair
If you are sure that the amplifier or motor is bad, you can only replace it or send it for repair. A direct replacement is expensive, and finding a professional repairer like Songwei to fix it can save you a lot of money.
How Do I Prevent 414 Alarms in General?
I always tell my customers: maintenance is just "fire-fighting”, prevention is the key to saving money.
* Cabinets are cleaned regularly, and fans are replaced immediately when they are broken.
* The power supply is not stable on the regulator, UPS.
* Do not use the cable to aging and cracking before you think of changing.
* Attention to the summer cabinet cooling, high temperature equipment life is short.
* Parts do not use brand-name goods, it is best to use the original or high-quality refurbished parts.
When Should I Look for Professional Maintenance?
There are some 414s that really can't be fixed on the spot:
* Repeated alarms, how to clear it can not be cleared.
* Suspect that the internal parts of the amplifier are bad.
* Lack of test tools to determine who has the problem with the motor and driver.
At this time, the best way is to find a professional repair. At Songwei, we often help our customers to deal with this kind of failure - we have a specialized test platform, which can quickly identify the problem point, and the repair cost is much lower than buying new parts, and we can also provide original refurbished parts to replace them.
Summary
Fanuc Drive Alarm 414, most of them are related to power supply, amplifier and motor. Don't be intimidated by the alarms, follow the steps to check and you can usually lock the problem. Daily good maintenance, you can greatly reduce the downtime.
If you really can't repair, or don't want to delay production because of downtime, directly find
Songwei such a professional team to help you do Fanuc servo amplifier repair and replacement, saving both money and time.
