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  1. #1
    tt12no is offline Plastic
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    Thumbs up Need help on single block/ Fanuc OM

    Hi,
    The single block is active(light on) at all time(even when the toggle switch is in OFF position) on this Kitamura Mycenter 1 845 with Fanuc OM control( the machine only runs one block at a time in automatic mode.). I took out and checked the switch with the meter for close(ON) and open(OFF). That is a good working switch. Before re-installing the switch, I turned the power back on and notice that single block light was ON(active?) without the switch in place, and same problem too after putting it back. For getting the machine back to normal working, please advice me what to do. And as always, thanks in advance.
    Best,

  2. #2
    Tonytn36 is online now Diamond
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    Default

    Check your door switches.

  3. #3
    angelw is online now Stainless
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    Default

    Quote Originally Posted by tt12no View Post
    Hi,
    The single block is active(light on) at all time(even when the toggle switch is in OFF position) on this Kitamura Mycenter 1 845 with Fanuc OM control( the machine only runs one block at a time in automatic mode.). I took out and checked the switch with the meter for close(ON) and open(OFF). That is a good working switch. Before re-installing the switch, I turned the power back on and notice that single block light was ON(active?) without the switch in place, and same problem too after putting it back. For getting the machine back to normal working, please advice me what to do. And as always, thanks in advance.
    Best,
    In addition to Tony's suggestion, the lubrication system will have either a pressure switch, or a level switch. Many MTB forced the control into single block mode, and often without generating any alarm message, when the lube system lost pressure or was low. Most of these switches I've seen fail safe, that is, if the switch fails, or if the signal or ground wire is cut or disconnected, the control sees that as a low lube event.

    Regards,

    Bill

  4. #4
    dandrummerman21's Avatar
    dandrummerman21 is offline Cast Iron
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    Default

    I second the low oil thing. I run a Kitamura Mycenter that does the exact same thing.

  5. #5
    Heinz R. Putz is offline Hot Rolled
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    Default Need help on single block/ Fanuc OM

    Total agreement with the Low Lube solution.
    I just got through training a shop in Chicago with exactly the same problem on a used mill with the Fanuc 0M control.
    We took the switch apart, checked the door interlocks, the switch wa stuck no matter what.
    Finally a light went on, could it be low lube?
    Yes it was !.
    Make a note everybody, I'll never forget it.
    Heinz.

  6. #6
    tt12no is offline Plastic
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    Default Oil level was low.

    Angelw was right. The oil level was low on this machine. Thanks to everyone' s opions.
    Best,

  7. #7
    706jim is offline Stainless
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    Our OKK blasts its alarm horn with a sound that could raise the dead when it runs short on oil.

    While not exactly the same thing, this story could help somebody:

    A few days back, I was in the middle of a 72 minute cycle on our Haas GR510 router.

    Wham! Machine screeches to a halt.

    Will not restart (Alarm: Emergency switch pressed)

    ?????????

    It turns out that the power supply to the vacuum table had become disconnected and is interlocked with the control, much like the lube fault mentioned above.

    Restored power to the table and all was well again.

  8. #8
    gorrilla is offline Stainless
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    Quote Originally Posted by Heinz R. Putz View Post
    Total agreement with the Low Lube solution.
    I just got through training a shop in Chicago with exactly the same problem on a used mill with the Fanuc 0M control.
    We took the switch apart, checked the door interlocks, the switch wa stuck no matter what.
    Finally a light went on, could it be low lube?
    Yes it was !.
    Make a note everybody, I'll never forget it.
    Heinz.
    Got a little Chevalier Cat 40 VMC with the Fanuc Oi-MB control. Did the exact same thing, lube level got low, single block activated. Took a service call all the way out from Houston to find that they do that when the lube gets low. 3 and 1/2 hours of drive time in that service call. Thing that really aggravated me was the fact that the books said not one word about it. Actually I thought the switch had gone bad and had them order one before they came all that way out here. Then when the tech got here, he takes one look at it, and asks if the lube is low. If the books had mentioned it, I would have checked that first.
    We of course do periodic maintenance and would have caught it next time through, but a line behind the table, under the shields, had burst, making it use an excessive amount of lube all of a sudden. Not even something I would call a tech to repair in itself, but being colorblind, I usually bring in a tech on electrical problems. Cross up a green wire and a red wire and sometimes it gets damned expensive. Sorta like having a tech drive half a day to tell you that the lube is low gets expensive.
    That's my main objection to service manuals. They always seem to have something in there that expects you to already know something. If I knew everything, why would I be looking in the service manual? And it's a common failing through all brands. I've been through Fanucs, Fagors, and Okumas, they all have the same problem. there will be some minor detail that they leave out completely, not even alluding to it at all. But without that detail, your looking at Chinese arithmetic. Or Greek, suit yourself as to what flavor.

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