CNC cutting maximum Thread of 1mm Pitch !!!


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Thread: CNC cutting maximum Thread of 1mm Pitch !!!

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    Default CNC cutting maximum Thread of 1mm Pitch !!!

    My machine is using Fanuc oi mate td Controller.

    My machine is cutting a Max. thread of pitch 1mm.
    When i increase pitch to more than 1mm, it still cut 1mm pitch Thread !!!
    If i cut 0.5mm pitch thread, then it cuts correctly of 0.5mm Thread.

    Looks like, a max of 1mm pitch Thread is cutting.

    Is there any setting or Parameters or Hardware issue ???

    Anyone Master here, plz help.


    Regards,

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    Default Re: CNC cutting maximum Thread of 1mm Pitch !!!

    Reduce rpm.



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    Default Re: CNC cutting maximum Thread of 1mm Pitch !!!

    Thanks dear for the reply.

    RPM is already 1800.

    Today, we changed few parameters 1420, 1430. Thread is now coming close to 1.5mm pitch.
    But, its not coming very correct. So am sure its Parameter issue. Can you suggest correct values of these parameters.


    Regards,



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    Default Re: CNC cutting maximum Thread of 1mm Pitch !!!

    Set 1430 to 5000 or more on a mm machine.



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    Default Re: CNC cutting maximum Thread of 1mm Pitch !!!

    Thanks.

    Current values are:

    1420: 15000
    1430: 13500

    Now Thread is coming 1.5mm pitch from start. But as the thread goes more inside, its becoming tight. And
    we can see very thin few threads at the very inner edge.



    Regards,
    Nitin



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    Default Re: CNC cutting maximum Thread of 1mm Pitch !!!

    Now we chnage values to:

    1420: 15000
    1430: 15000

    Now thread is looking fine except 1-2 issues.

    1. Last 1-2 thread is not coming correct.
    2. After last Thread, there r few thin lines are coming. Is tool is trying to do something at the very inner edge ? some chamfer or something else ?


    Regards,



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    Default Re: CNC cutting maximum Thread of 1mm Pitch !!!

    The thin lines are because of angled retraction.
    First and last few threads would never be accurate because of acceleration and deceleration.
    This is normal. Lower rpm, say, 500 would reduce this problem, but it cannot be completely eliminated.



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CNC cutting maximum Thread of 1mm Pitch !!!

CNC cutting maximum Thread of 1mm Pitch !!!