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  1. #1
    Join Date
    Dec 2007
    Posts
    8

    Drip feed mode with Fanuc OMA

    Hello Everybody,

    I am Visu, a new member of the CNCzone forum.
    I need help with Fanuc OMA control
    I bought a Leadwell VMC with Fanuc OMA control. I am able to send and recieve fixed memory part programs from PC to CNC and vice-versa. I am unable to operate the drip feed mode
    G127.5 is not listed in the ladder logic and there is no switch for tape mode.
    Is it possible to enable the drip feed mode by altering the PMC

    Thanks for any help

  2. #2
    Join Date
    Feb 2007
    Posts
    33
    As far as I know, you cannot drip feed an OM-A control. I have the same control and asked the same thing 5 years ago and was told it was not capable of drip feeding without spending a huge amount of money for an upgrade. My .02.

  3. #3
    Join Date
    Sep 2005
    Posts
    767
    The 0M-A will not drip-feed. When Fanuc introduced the 0M-B, they added a bit on the I/O interface called "DNCI". If the machine tool builder puts some logic in the ladder to turn on the DNCI bit, then you're able to run in drip-feed mode. The 0M-A never had this bit, so there's no chance of making it work, even if you can edit the ladder.

    If you had a 0M-B or 0M-C without a TAPE mode on the mode select switch, it would be possible to add the function by editing the ladder.

  4. #4
    Join Date
    May 2005
    Posts
    109
    Quote Originally Posted by visu View Post
    Hello Everybody,

    I am Visu, a new member of the CNCzone forum.
    I need help with Fanuc OMA control
    I bought a Leadwell VMC with Fanuc OMA control. I am able to send and recieve fixed memory part programs from PC to CNC and vice-versa. I am unable to operate the drip feed mode
    G127.5 is not listed in the ladder logic and there is no switch for tape mode.
    Is it possible to enable the drip feed mode by altering the PMC

    Thanks for any help
    I can help you turn on DNC on OMA controller. PM me.

  5. #5
    Join Date
    Aug 2007
    Posts
    793
    Quote Originally Posted by Dan Fritz View Post
    The 0M-A will not drip-feed. When Fanuc introduced the 0M-B, they added a bit on the I/O interface called "DNCI". If the machine tool builder puts some logic in the ladder to turn on the DNCI bit, then you're able to run in drip-feed mode. The 0M-A never had this bit, so there's no chance of making it work, even if you can edit the ladder.

    If you had a 0M-B or 0M-C without a TAPE mode on the mode select switch, it would be possible to add the function by editing the ladder.
    on my Fanuc 0MA with analog servo drip feed works fine without any additional option
    software version 402

  6. #6
    Join Date
    Oct 2014
    Posts
    0

    Re: Drip feed mode with Fanuc OMA

    Hello
    I have recently bought Leadwell VMC with OM-A and i wanted it to accept Drip feeding /DNC can any one help?


    best regards
    Bilal

  7. #7
    Join Date
    Aug 2007
    Posts
    793

    Re: Drip feed mode with Fanuc OMA

    Quote Originally Posted by brightmachinery View Post
    Hello
    I have recently bought Leadwell VMC with OM-A and i wanted it to accept Drip feeding /DNC can any one help?
    best regards
    Bilal
    look at your ladder and find what signal turns G127.5 (DNCI signal) on

  8. #8
    Join Date
    Apr 2016
    Posts
    12

    Re: Drip feed mode with Fanuc OMA

    Quote Originally Posted by guhl View Post
    look at your ladder and find what signal turns G127.5 (DNCI signal) on
    My machine doesn't appear to have a "ladder" only parameters page and diagnostic page. Is there a function to unlock the "ladder" page?

  9. #9
    Join Date
    May 2005
    Posts
    109

    Re: Drip feed mode with Fanuc OMA

    Hi cmpcleveland, What is the fanuc control model?
    check the line#127 of diagnostic screen, bit #5 if it is 1.

  10. #10
    Join Date
    Feb 2016
    Posts
    4

    dripfeed

    dear sir
    i have fanuc 0ma control it dos not show g127.5 want to editing in ladder can i send you copy of e-prom
    mukesh dhiman
    e-mail [email protected]
    +9109814042108

  11. #11
    Join Date
    Feb 2016
    Posts
    4
    Hello Everybody,

    I am mukesh, a new member of the CNCzone forum.
    I need help with Fanuc OMA control
    I bought a johnford VMC with Fanuc OMA control. I am able to send and recieve fixed memory part programs from PC to CNC and vice-versa. I am unable to operate the drip feed mode
    G127.5 is not listed in the ladder logic and there is no switch for tape mode.
    Is it possible to enable the drip feed mode by altering the PMC

    Thanks for any help
    [email protected]

  12. #12
    Join Date
    Feb 2016
    Posts
    4
    Quote Originally Posted by Jung View Post
    Hi cmpcleveland, What is the fanuc control model?
    check the line#127 of diagnostic screen, bit #5 if it is 1.

    Hello Everybody,

    I am mukesh, a new member of the CNCzone forum.
    I need help with Fanuc OMA control
    I bought a johnford VMC with Fanuc OMA control. I am able to send and recieve fixed memory part programs from PC to CNC and vice-versa. I am unable to operate the drip feed mode
    G127.5 is not listed in the ladder logic and there is no switch for tape mode.
    Is it possible to enable the drip feed mode by altering the PMC

    Thanks for any help
    [email protected]
    show G127.5 show this 00000100

  13. #13
    Join Date
    Mar 2011
    Posts
    230

    Re: Drip feed mode with Fanuc OMA

    Interesting thread, I have a Leadwell MCV OP Fanuc OM. The manual I have says OMF

  14. #14
    Join Date
    Aug 2013
    Posts
    0

    Re: Drip feed mode with Fanuc OMA

    Hello please can you help me to enable drip feed on my Fanuc 0ma?
    Thankyou

  15. #15
    Join Date
    Aug 2013
    Posts
    0

    Re: Drip feed mode with Fanuc OMA

    Quote Originally Posted by guhl View Post
    on my Fanuc 0MA with analog servo drip feed works fine without any additional option
    software version 402
    Please can you help me with that?

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