Fanuc Alarm 414 X Axis Detect Error

[Dallas Querry]

AFanuc 414 servo alarm is generated by the CNC when it detects that an amplifier has a high current alarm 8, 9, or A. To determine the exact cause, you must go through the process of elimination. The high current alarm may be caused by the servo drives, amplifiers, modules, motor and/or cables.

Located below the logic board, Alarm A indicates an abnormal current in the third axis on the amplifier which is labeled (A). If your amplifier only controls two axes, your CNC should never display an Alarm Code A.

With an ohm meter, check for shorts in the motor by measuring leg-to-leg and leg-to-ground on all three legs. An ohmmeter will tell you if your motor is shorted. Leg-to-leg readings should be low, but consistent, on all three legs. The leg-to-ground readings should be open (OL) on all three legs-to-ground.

With a megger, check each leg-to-ground. A megger will tell you if your motor is grounded. The reading should show infinity (or 500 MEG and above) at the 1000V setting. Check all three legs-to-ground because the problem can be in the power plug/terminal box of the motor or the power cables going from the drive to the motor.

If your CNC displays a Fanuc high current alarm, Alarm 414, or Servo Alarm 8, 9, or A, Tennessee Industrial Electronics, LLC offers free tech support to help you diagnose the problem. TIE can also deliver fast, reliable repair services for your faulty servo amplifier, motor, drive, cable, or you can purchase a newly refurbished unit.

I have received collision alarms & OVC on welding robots in hot environments; flux-core welding 450+ amps with hour long cycle times. Changing speed and motion path on large joint moves would solve that issue.

Another thing worth considering is if you have a linear move that is close to your last taught point, but with joint angles that have the robot in a different posture. The robot may try moving fast enough to error out on an axis speed limit, and if it's already moving fast enough the sudden stop may trigger a collision alarm. What is the specific error you are getting, and how does it appear? What I mean is are you getting a yellow warning like this one, or just an alarm in the message window and fault history?

In some instances thew Fanuc alarm 414 family of servo detection errors may indicate a short to ground. The short is causing too much current to flow through the power module inside the amplifier and will eventually cause it to break.

If your CNC control has 414, 424, 434 or 444 listed as a servo detection alarm; then it needs to be treated the same as the high current alarms on the ALPHA servo amplifier modules or servo units and beta units. Namely HC, HCL, HCM, 8, 9 and A (seperate alarm page for these). Below we list possible causes to work through as a process of elimination. We do not however advise how to do this; as this should be done by a trained CNC service engineer!

If your Fanuc control system displays a HC / 414 or 8/9/A alarm then we can help by assiting with diagnosis and the supply of parts or repair of servo drives, motors and control systems. Further we can build cables on order if required.

Below is a list of FANUC servo amplifier alarms and faults with a short description briefly describing the source of each error code. Some point to the source of the problem itself, others point to the problem and do not identify the failing/malfunctioning component.

DC voltage of the main circuit power supply is abnormally high.

Internal cooling circuit faulty

Overcurrent flowed into the input of the main circuit. Input supply voltage imbalance, IGBT defective. (PSM-15 to PSM-55)

The battery voltage of the absolute pulse coder is low. (warning)

The main circuit power module (IPM) has detected an overload, overcurrent, or control supply voltage decrease, overcurrent, or control supply voltage decrease. Internal cooling circuit failure, Overload, Input supply voltage imbalance, IPM failure, or control supply voltage decrease of the power module.

Position control system fault. Due to an NC or servo system fault in the reference position return, there is the possibility that reference position return could not be executed correctly. Try again from the manual reference position return.

Machine is a used machine, probably was not powered up for a long time with battery error on first power on. Had to reload the archives for nc and plc to get in its current state. Only remaning alarms are those atm. During transportation machine was disassembled into 2 pieces that z axis cables were unplugged.

After the assembly we plugged those back in. Motor has absolute encoder, and one of mechanics had to rotate the motor by force for assembly while the motor and encoders cables were still unplugged. Which makes me wonder if i need to re reference it through parameters or something like that.

i m not much experinced in sinumerik systems but, what i understand from alarm 25100 is, there is a second external encoder defined into the system and actual readings of this and motor encoders are in difference greater than the set parameter. but i couldnt locate any external encoders around the axis z motor or the plate that rotates by the motor.

so my thinking is, if the second encoder is mistakenly activated and it is not actually connected to the system all the encoders alarm i m getting is from that external encoder and deactivating it from system would solve my problems. if so how do i deaactivate the second encoder of that axis.

or if i m wrong about my idea what could be the other reasons of this alarms? i hope the motor encoder is not the real issue, there is no visiable damage on motor or the cables and we were "told" machine was running fine the last time it was powered.

However from the alarms/message it seems that motor encoder hardware fault has triggered.It could be because of encoder cable fault or becuase of motor encoder fault. Check the cable, if you have spare cable, try by connecting it externally.

A FANUC alarm code, also called a FANUC fault or error code, is how a CNC control indicates there is a problem. This error message could indicate issues with either the machine itself, be that electric or mechanical. The FANUC error code might also indicate an issue with the g-code program.

Use the list below to interpret what exactly the fault code is trying to communicate. If you require a replacement part, know that MRO Electric stocks thousands of FANUC CNC replacements. Get your new FANUC servo amplifier or check out our FANUC servo motors. To order a replacement part or a repair job, please call 800-691-8511 or email sa...@mroelectric.com. Curious about other common FANUC CNC problems? Check out our FAQ here.

Hi Running a series 180i-M , the machine halts with no error or alarm. ctrl+F2 or any other function key is impossible. The softkeys in fanuc software work with mouse. The problem resolve after some time but randomly. The rest of the computer functions work fine ( alt+tab, alt+F4, using other applications..)

any idea

I own a machine from Newwai

And after the operation, I discovered the following

When I am inside a program and finished it and I want to go to another program

I do not find that the entry button for another activated program must be filled with the machine in order to do that

And the button dedicated to the barbarism of the bar is an act of an act

I have a Miyano mill with an O-M fanuc controller. I get an overtravel in the +Z error. It appears that the error is when the tool change carousel does not stop in the correct position. There are 2 magnetic limit switches that both have to be illuminated to show the controller that the tool change carousel is in the correct place. Sometimes only one switch is illuminated due to the cam rotating past one of the switches. Why would the tool changer sometimes overtravel in its revolution? The machine will run fine for an hour or so and then the error happens. We put a metal object in front the sensor that is not turned on and then step rotate the tool change carousel. This brings it back into proper alignment and the machine will run.

Any ideas what I need to do?

Thanks in advance for any assistance you can provide.

I have a fanuc control SERIES O-TC TYP AO2B -OO98-B501

machine, Lathe and the machine belongs to the Jolly company

I have a problem that the batteries have expired, and when I opened the machine, it was found that the parameter was not present

When trying to download the parameter, the control panel to run the motors does not activate

I want a way to solve this problem

Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not fully understand. If you have any doubts about doing a procedure contact your Haas Factory Outlet (HFO) and schedule a service visit.

Sigma-5 servo motors, non-contact encoders output serial data signal to the control. If the serial data signal is missing or becomes unreliable the control will generate a serial data communication error. Electrical noise can cause the serial data signal from the encoder to become unreliable and cause false alarms. Follow the troubleshooting guide below to help eliminate the noise in the system.

Look for signs of damage and stiffness on the cable and connector. Disconnect the power cable from the amplifier and motor. Measure the resistance from leg to leg (red, white, black wires), and from leg to ground (green/yellow wire). Make sure the measurements result in an open connection. Refer to the table below as a reference.

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