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IndustryArena Forum > MetalWorking Machines > Harrison Alpha > Help with the Harrison Alpha 550 machine - "SERVO ALARM"
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  1. #1
    Join Date
    Oct 2017
    Posts
    19

    Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Greetings to all, I hope you can help me, I tell you my problem:


    In the company where we work we have a machine 600 Lathes Alpha 550 year 1996.
    The other day we turned on the machine as usual and nothing strange happened. From one moment to another the machine threw "SERVO ALARM".
    We turn it off and on again, after starting the system again shows "ALARM SERVO", and we can not do anything else.
    The bad thing is that we do not have any manual of the machine due to the years.
    I would like to know if anyone in the forum knows this machine or if it has information on it.
    Attached image of the fault and details of the machine.
    Thank you very much.



  2. #2
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Can you help me with the manuals, too, please?
    o some information.
    Thanks.

  3. #3
    Join Date
    Oct 2014
    Posts
    137

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Please, tell me series-model of your CNC system. You need manuals for machine or for CNC system?

  4. #4
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hello, the cnc system is a Harrison - GE Fanuc. I think the PCB might be A826 XXX, anyways i'm attaching a lot of pic's. If there is any chance you got both machine and cnc manuals it would be very usefull.





    Greetings.

  5. #5
    Join Date
    Oct 2014
    Posts
    137

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    The PCBs from FANUC systems have inscription which begin so: A16B-xxxx-xxxx or A20B-xxxx-xxxx.

  6. #6
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hello agering, I can't find the PCB model number, tell me where to find it please.
    greetings.

  7. #7
    Join Date
    Oct 2014
    Posts
    137

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Except monitor all the PCBs on pictures do not look like products FANUC. May be Harrison developed this system.

  8. #8
    Join Date
    May 2016
    Posts
    526

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hiya just private messaged you the details
    Unfortunately you cannot identify the fault without accessing the diagnostics and alarm page
    Send me your email and i will send you the procedure

  9. #9
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Quote Originally Posted by mbservice View Post
    Hiya just private messaged you the details
    Unfortunately you cannot identify the fault without accessing the diagnostics and alarm page
    Send me your email and i will send you the procedure
    I have answered the message, thank you.

    Attached Thumbnails Attached Thumbnails vlcsnap-2017-11-06-10h16m32s140.png   vlcsnap-2017-11-06-10h16m47s160.png  

  10. #10
    Join Date
    May 2016
    Posts
    526

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hiya I assume that the machine is now ok

  11. #11
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Quote Originally Posted by mbservice View Post
    Hiya I assume that the machine is now ok
    Good morning, sorry for the delay.
    The machine is stopped, but thanks to the manuals we can check the connections and find the fault. There are damaged cables in very bad condition. We assume this is the problem.
    We must repair these cables and test the machine, but for now our staff is working on another machine, when we solve the problem I will comment in the forum.
    Thanks for the help mbservice.

  12. #12
    Join Date
    Mar 2021
    Posts
    1

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hi mbservice. Our alpha 550, with a 21-TB, just started doing the same thing as the original poster. Both axis are giving a servo alarm and the 21-TB lights up a red light alarm in the 2nd spot. I'm not sure how to enter diagnostics and alarms on this. Could you please help me?

  13. #13
    Join Date
    Mar 2021
    Posts
    3

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hello All

    New to this and the FANUC GE on Harrison Alpha 400, 1996, need help with SERVO alarm just bought machine not knowing anything about these, thought I could apply the knowledge of FANUC OT etc, I am very wrong, so purchased without manuals.

    I don't know if you have to home these like for the Old Colchester CNC 2000 machines, Hardware very similar but software not.

    Any advice would be helpful plus manuals, from this thread on the forum there is a method for placing into diagnostics for troubleshooting etc.

    Any help and advice very much appreciated.

    Many thanks

    Ian

  14. #14
    Join Date
    Mar 2021
    Posts
    3

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    I now have the original manuals and, it is pointing to the I/O or main board, managed to work out the diagnostics.
    I am seeing all the contactors closed except K3, this turns the power on for the Servo drives. Traced through the 110V circuit, looks link a serial link into CP3 through the two servos.

    I assumed the electrical circuit will complete when, guessing, the Main FANUC control turns them on, I don't have the details for the circuits within the servos.

    Tested the solenoid for K3 and that operates fine.

    I cleaned out the PCB's for the control and I/O, came up with parity error, I have managed to reset the memory, but now have no parameters and get a screen full of servo messages like 'error detecting servo'.

    Only thing I cannot seem to do is get the machine back into manual mode, it is sitting in MDI with errors on the screen

    Any advice would be appreciated.

  15. #15
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Good afternoon, I'm happy to tell the machine is operational. But now we need define the limit of each axes to avoid collision.


    Please someone who knows how and where we can put this parameters.
    Thank you.

  16. #16
    Join Date
    May 2016
    Posts
    526

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    What do you mean to avoid collision ? There are no limits on the Alpha 550

  17. #17
    Join Date
    Oct 2017
    Posts
    19

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hi mbservice, thanks again. According to operator before the repair, the machine has limits (overtravel) by software, not "limit switch".

  18. #18
    Join Date
    Aug 2017
    Posts
    1
    Hello!!
    I Have a Harrison Alpha 550 machine - "SERVO ALARM".
    Can you help me? .
    I would be very grateful.
    Thanks in advance.
    Sorry for my poor
    English

  19. #19
    Join Date
    Dec 2020
    Posts
    1

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    hi i have Harrison Alpha 550 machine with the servo alarm on it the year of the machine is 2001 and the serial no is s50136 and if you hold the reset button in the machine will run
    any way of resenting it thanks

  20. #20
    Join Date
    May 2016
    Posts
    526

    Re: Help with the Harrison Alpha 550 machine - "SERVO ALARM"

    Hi John
    Please send me a message with your mobile number on it as I may need to talk you through the diagnosis

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