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  1. #1
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    Aug 2010
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    citizen stops on M7

    not everytime but 3-4 times a day my machine freezes in the program on a "M7" command (open collet)

    citizen M5 16 with a cav-is bar feeder.

  2. #2
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    Quote Originally Posted by hitachibos View Post
    not everytime but 3-4 times a day my machine freezes in the program on a "M7" command (open collet)

    citizen M5 16 with a cav-is bar feeder.
    What is your RPM just prior to opening the collet?
    It may be that it's right on the edge of what is allowed and needs to be lowered to open the collet.
    Does this machine have servo motor for collet open?
    Do you get any alarms or messages in the message window?
    Control the process, not the product!
    Machining is more science than art, master the science and the artistry will be evident.

  3. #3
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    RPM = 300
    Servo motor & ball screw for collet open have been replaced.
    voltages are 211v 24v 5v all good
    Bar feed torque is set properly

    it started happening once everyother day now every 20 mins

  4. #4
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    Any alarms?
    Have you tried it with the spindle off?
    You say that you replaced the motor and ball screw, was that because of this issue?
    Control the process, not the product!
    Machining is more science than art, master the science and the artistry will be evident.

  5. #5
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    Oct 2008
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    108
    This sounds to me like you may be having a problem with the cable. The control itself issues a command and then waits for the component to respond to it saying that the task has been completed. If the controller issues the M7, but does not get a response from the servo, it does not know its open. I would try a couple of M7s with g4 between them, eg:

    M7
    G4U.5
    M7
    G4U.5
    M7

    I have made a habit out of doing this is all my programs. A little oil in the cable can cause a lot of head scratching.
    www.atmswiss.com

  6. #6
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    Oct 2013
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    8
    We had something similar happen with one of our B12's. It turned out to be a dodgy encoder on the collet motor (these are the red capped things on the drive motors), we would have to re zero all the axis before we could start the machine again. It would work for about half a day then stop, just like your on collett open / close.
    Once we changed it over all was ok and still running fine.

  7. #7
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    Aug 2010
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    Thank you all fopr help it turned out to be a bad MACRO MEMMORY CASSETT HR415 replaced it reinstalled Sram and everything has been good since.

    Thanks again

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