Reply with Quote...depending on the age of your machine ...one loose wire terminal or wire nut will cause high current draws to motors. I would check there first.
Servo amplifier error 8.
Hello all friends
I got alarm 8. On my fanuc servo amplifier
And this happened in the morning
Then i switch machine power off and on again its same 8.
After 30 min
Off and on again
Its ok 8. Is gone and machine running well
So can any one help please
My machine is tornado 110
.....
Note: iam allready replace the igpt of servo amplifier with anew one
But still same problem
Similar Threads:
Re: Servo amplifier error 8.
...depending on the age of your machine ...one loose wire terminal or wire nut will cause high current draws to motors. I would check there first.
I checked the motor and motor wire
All is ok and if i change the servo drive with other one new
The problem is gone
So please help
Have to know your servo model number to be sure. But alarm 8. (with the dot) is an IPM Alarm (intelligent power module)ie, the igbt-bridge. This can have some different reasons caus the IPM only has one fault output, but several internal protection functions (se the IPM datasheet for more info). The most common problem with this alarm is, that the driver stage electrolytic capacitors are bad, causing UVLO (when servo is cold or when motor is energised). It can also be over temperature in the IPM. In that case check youre cooling. (Se IPM datasheet for more reasons).
In youre case the servo works after some warm up, wich points to the caps being bad.
Hopes this solves your problem.
Thank youfor help
Iam allready upload one picture for my servo here
And as you told me
I wll change the big capastore on the servo board
And i wiil check if the alarm is gone
And if not
So i will change the igpt also with new one
And i will tell you the latest action
Thank you so much
I will do my best. Waite my reply
Hi again.
There's no need to change the big ones(!). If they were bad you would have other alarms.
The ones i'm talking about is the small(est) ones near the optocouplers and the IGBT.
I think they are small surface mount metal cans (grey) @ 33µF. Cant remember the exact voltage.
If you take a picture of the right spot, I can mark the for you, if you are unsertain what "driver stage" means.
Hi Mr. TechSwede
Iam upload 2 pictures for the servo board
And for the IGBT after remove it
Please mark for me the components you want
Me to change it
Notes:
Do you mean the 5 capastores 33mf/25v
iam allready checked them by multimeter and all is good
Do you think the IGBT have problem
I dont know. Please advise
Thanks a lot
Waiting your help
Last edited by Yasser2000; 01-22-2020 at 06:33 PM.
Hello Mr. TechSwede
Iam waiting you
Please help
Re: Servo amplifier error 8.
Are you still looking solution for Fanuc alarm? if yes let me know where you are located? I'll give you few option to get fix this issue. PM me for fast response.Originally Posted by Yasser2000
thanks
Yes iam still looking
I can't pm you here because it is off for my
I don't know why
But if you can help. Tell me here or
Send me Emil at
ytyt1000@gmail.com
Last edited by Yasser2000; 01-27-2020 at 01:54 PM.
Hi.
Yes the 33µF.
Not to sound rude, but you can not tell if they are god with a multimeter. Only if they are totally bad. You need an LRC-meter that can measure at least 1kHz to tell their status.
Change them to some good quality brand. Low impedance/ESR ones (or you might still get the alarm).
Hope this solves youre problem. It has for me, several times.
/ Per
Can i use this one?
Or must be same older
Thanks
YASSER
Re: Servo amplifier error 8.
sometimes al-8. also comes from control card try to replace it.
quick-cnc
Re: Servo amplifier error 8.
Could you figure out the source of yuor problem, because we have the same error here.
Alarm 8 and after a few restarts in the morning, the machine is running for the rest of the day.
Nothing to do
I change the drive
