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IndustryArena Forum > MetalWorking Machines > Okuma > Okuma RU1 board relays
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  1. #1
    Join Date
    Jan 2011
    Posts
    16

    Okuma RU1 board relays

    My LB15 won't unclamp the chuck. We have it narrowed down to the RU1 board. Can somebody please tell me which relays on the RU1 board need to be replaced when the board fails? Any help will be appreciated. Thanks.

  2. #2
    Join Date
    Jan 2009
    Posts
    55

    Re: Okuma RU1 board relays

    Quote Originally Posted by Farmer Machine View Post
    My LB15 won't unclamp the chuck. We have it narrowed down to the RU1 board. Can somebody please tell me which relays on the RU1 board need to be replaced when the board fails? Any help will be appreciated. Thanks.
    On my Cadet lathe, I changed CROKA and CRVAC relays. They are both Omron LY2N 24vdc relays.

  3. #3
    Join Date
    Feb 2009
    Posts
    6028

    Re: Okuma RU1 board relays

    You must have an odd Cadet, all I saw had the RU1 board as well, and they are solder on.
    I can't seem to find my Cadet electrical prints right now, only the OLD LB15. I'll keep looking, they are labeled on the prints.

  4. #4
    Join Date
    Jan 2020
    Posts
    1

    Re: Okuma RU1 board relays

    Same problem on our cadet. Both sides of the solenoid is magnitized, So we found a used board. But I will see if replacing those relays fix our bad board. Thanks for the post

  5. #5
    Join Date
    Jan 2014
    Posts
    1

    Re: Okuma RU1 board relays

    Did you have any luck replacing the relays on your board.
    Also any guidance on finding the RU1 board, have a 199 Okuma Crown L1060. giving me Alarm 1725-A CHUCK ls-sol mismatch

  6. #6
    Join Date
    Oct 2010
    Posts
    25

    Re: Okuma RU1 board relays

    may be it is to late by the way I am Attaching a small picture of the chuck clamp unclamp diagram located on RU1 You need to define which relay need to be changed
    Attached Thumbnails Attached Thumbnails chuck clamp unclamp RU1.jpg  

  7. #7
    Join Date
    Oct 2010
    Posts
    25

    Re: Okuma RU1 board relays

    some info I hope ththis help
    Attached Thumbnails Attached Thumbnails U10 CONTROL FUB-P4M4 CROWN.jpg   FUB-P4M4 EQUIVALENT TO RU1 .jpg   RU1 CADET LNC8.jpg  

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