fanuc_18i_machine

[ag10rao]

Hi all,

I have a Fanuc 18i machine ( Jobs ) and ,, Over travel -X '' alarm.
What is the maintenance procedure ?

Many thanks !

[stevo1]

If it is a soft overtravel then you should be able to move the macine the opposite direction that you overtraveled and press reset and the alarm should clear. If it is a hard overtravel there should be a overtravel bypass button on your control that you have to hold in and jog the machine off the overtravel and press reset. Some machines when holding down the bypass button only allow you to move the machine with the hand wheel.

Stevo

[ag10rao]

Thanks Stevo,

It seems to happen that the operator introduce wrong data for X.

[BKCOM]

you should try with OT release Button on the operation panel, it is no problem.
Every machine has

[SuLeman Fanuc]

Hi,

How r u?

I m Suleman Khosa and we have almost 50 CNC machines of Japan,Germany & Taiwan in which FANUC control was installed. I have one machine in which one problem was occured during start in early in the morning.after two to three start the machine then alarm is reset automatically and all day machine is working smoothly through out day. Then one more time occur early in the morning and reset after On/Off machine 2 to 3 times. Detail of alarm is given below.


System Alarm: 970 NMI occured in PMC LSI.

Manual of FANUC said: Replace the motherboard.

Fanuc series is 18i.

Fanuc Motherboard number is A02B-0283-B500.

Fanuc Master PCB number is A20B-8100-0661 .
That alarm is occur due to battery low because that machine is off for three years and not any power given to that machine. When we ON it after three years then its have no data. We changed its alkaline batteries and also lithium battery of motherboard and put all CNC SRAM data and CNC parameters after that machine is working properly only one week. Then its parameters are remove in one morning, we load all things and now its working properly but at morning its gave system alarm 970 and then working properly after two to three times ON. I have some wuastions from you. Please answer me.

Q1) Is it problem of backup battery?

Q2) Please give me the method of memory all clear function of FANUC.

Please reply me, because its too costly to replace motherboard.

Hope you will give me positive response.

My personal Email id is subhani_engr1@yahoo.com, please reply me at yahoo adress.

Thanks alot.

[fanucman]

Originally Posted by ag10rao Hi all, I have a Fanuc 18i machine ( Jobs ) and ,, Over travel -X '' alarm. What is the maintenance procedure ? Many thanks !

What is the alarm number? there are 2 different alarms for over travel.. one is software the other is hardware OT. . aka machine hits switch...

please not alarm number..

[dpuch]

I tried looking up that error, but the manual I have is missing the 970 and I didn't se an explanation of what NMI is.

If you have not, consider re-seating all the cards, but I am not sure if there is not any risk to doing that. Simply pull them out and put them back in. After 3 years, perhaps they are not making great electrical contact.

Anyone else know if there are any possible issues with removing the cards? Anything to be aware of that might corrupt the memory or system software?

[fanucman]

Originally Posted by dpuch I tried looking up that error, but the manual I have is missing the 970 and I didn't se an explanation of what NMI is. If you have not, consider re-seating all the cards, but I am not sure if there is not any risk to doing that. Simply pull them out and put them back in. After 3 years, perhaps they are not making great electrical contact. Anyone else know if there are any possible issues with removing the cards? Anything to be aware of that might corrupt the memory or system software?

of course hes gonna loose all memory if he removes the modules.. the only way he should do it is to first make an sram backup then reseat everything..

[SuLeman Fanuc]

Originally Posted by dpuch I tried looking up that error, but the manual I have is missing the 970 and I didn't se an explanation of what NMI is. If you have not, consider re-seating all the cards, but I am not sure if there is not any risk to doing that. Simply pull them out and put them back in. After 3 years, perhaps they are not making great electrical contact. Anyone else know if there are any possible issues with removing the cards? Anything to be aware of that might corrupt the memory or system software?

Third manual said that 970 NMI occourd in PMC LSI. What is meant by PMC LSI? and detail of alarm in manual is that (An error occured in the PMC control LSI device on the main board( I / O RAM PARITY) is it possible to remove it?

[f-bu]

"970 NMI occourd in PMC LSI" usually tells that you must call FANUC service. One time I have seen it, after that they changed a board.

[hrh]

NMI = non maskable interrupt
The PMC LSI cannot correct the error.
Many times the error is due to a problem on the distributed IO. The +24VDC PSU is giving problems or a fuse is blown on the operator panel interface PCB.
Also check for shavings or conductive dust accumelated on the PCB.

Yes, fbu is also right that the main/master pcb could be defective.
FANUC had an issue with the PMC LSI for i-Series controls shipped between 2005 and 2006.