Fanuc 21i ALARM 24 HELP !!!!
Hi from Guatemala, Central America . I have a serious problem with my Romi G20. This will be my third months without my machine.
When I turn he machine "on" , it starts to run but for only 3 seconds and brutaly stops ...and then the CNC automatically restarts.
I can see an ALARM 24 at the spindle drive window .
According to FANUC, Al-24 is a problem of communication between the CNC and the spindle drive.
I already changed the cable. I sent the spindle drive + CNC for checking and they are fine.
And I have still the same problem ...
can anyone help me ? Does anyone knows what could cause the 24 Alarm ?
Thanks
André
Re: Fanuc 21i ALARM 24 HELP !!!!
The Alarm 24 is not your problem. You have a short in your 24VDC circuit. Normally this is caused by a broken wire in the wire-ways which moves when the machine moves. Could also be a bad output like a bad valve solenoid. The reason you are getting the alarm 24 is because you lost the CNC power and thus causing the spindle drive to alarm out. You will need a meter to measure all of your inputs and outputs wires to ground. You should see about 40 Ohms or more. If you have a very low reading then disconnect that wire and see of the machine fires up OK after that. Good luck as these are hard to find.
Re: Fanuc 21i ALARM 24 HELP !!!!
Thanks so much DRDOS !!! That is a great information !! we will immediatly follow your instructions ...may be I will be back ...!!! André
Quote:
Originally Posted by
drdos
The Alarm 24 is not your problem. You have a short in your 24VDC circuit. Normally this is caused by a broken wire in the wire-ways which moves when the machine moves. Could also be a bad output like a bad valve solenoid. The reason you are getting the alarm 24 is because you lost the CNC power and thus causing the spindle drive to alarm out. You will need a meter to measure all of your inputs and outputs wires to ground. You should see about 40 Ohms or more. If you have a very low reading then disconnect that wire and see of the machine fires up OK after that. Good luck as these are hard to find.
Re: Fanuc 21i ALARM 24 HELP !!!!
Hello DRDOS
As told we are in Guatemala and there is no CNC or FAnuc technician here ...
So I am alone in the desert and it´s why I really appreciate your help.
And i am not electronician !!!
Something that I don´t understand is :
You said that we have a problem in the 24DC line OR a problem of ground in I/O lines ??? or you said that a problem of ground in one of the I/O lines and this is affecting the 24DC line ????
Am I right ?
thanks
Quote:
Originally Posted by
austenit
Thanks so much DRDOS !!! That is a great information !! we will immediatly follow your instructions ...may be I will be back ...!!! André
Re: Fanuc 21i ALARM 24 HELP !!!!
Not to horn in on drdos, the inputs and outputs use 24volts. Some where there is a short in the wiring, that is connecting your 24volts to ground. With the power off, measure with an ohm meter, your inputs and outputs to ground.
Re: Fanuc 21i ALARM 24 HELP !!!!
Once again, thanks to ifxcnc and drdos
I believe I understand the meaning of your instructions but I can not do it practically
So I have the module I/O with all the cables connected , with numbers A1, A2, A3 ....., then another line with number B1, B2 ...
And I have a total of four module like this.
Then , with all power off, I put one probe of the ohmmeter on , let s say the B24 and the other proble on the ground ....is that right ???
In this case , I get some with " o" , others with 2400 ohms and so but nothing like 60ohms ??????
?????
I guess something is wrong in what I am doing
Quote:
Originally Posted by
ifixcnc
Not to horn in on drdos, the inputs and outputs use 24volts. Some where there is a short in the wiring, that is connecting your 24volts to ground. With the power off, measure with an ohm meter, your inputs and outputs to ground.
Re: Fanuc 21i ALARM 24 HELP !!!!
Thanks so much to FIXCNC and DRDOS
We did as you said.
We measured all I/O and we find someone with very low Ohms ( 2 ohms) . So we disconected those one ( one by one) and at the third one, the machine started !!!
It was the coil of the electro valve of the closing chuck !!!!
Great !!!
thanks/ Gracias a lot and que viva CNCZONE !
Quote:
Originally Posted by
austenit
Once again, thanks to ifxcnc and drdos
I believe I understand the meaning of your instructions but I can not do it practically
So I have the module I/O with all the cables connected , with numbers A1, A2, A3 ....., then another line with number B1, B2 ...
And I have a total of four module like this.
Then , with all power off, I put one probe of the ohmmeter on , let s say the B24 and the other proble on the ground ....is that right ???
In this case , I get some with " o" , others with 2400 ohms and so but nothing like 60ohms ??????
?????
I guess something is wrong in what I am doing
