Help with Doosan Puma 400 (Fanuc 21i TB) Threading
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  1. #1
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    Default Help with Doosan Puma 400 (Fanuc 21i TB) Threading

    Hi everyone!

    My name is Matías and I'm new with fanuc programming. I have 9 months using a Lynx 300 Lathe and now I'm using a Puma 400LMC. I have to make the same piece that I do in the Linx but now in the Puma. The problem is when I try to use the program that I use in the Lynx, when it reaches the threading code line it shows the next alarm:" alarm 011 no feedrate commanded".
    I tried to change the "F" value but nothing changes. Its strange because the program works fine in the Lynx (Year 2012) but in the Puma doesn't work (Year 2008)
    The program is for a API 2-7/8" Female Threading, there is the threading code that seems to be the problem

    Best regards

    T404
    G54
    G97S100M03
    G0X46.Z10.39M08
    G76P020229Q100R0.1
    G76X53.83Z-95.P2600Q600R13.5F5.08 (Here is when the reading stops)
    G00Z10.
    T404
    G54
    G97S100M03
    G00X46.5Z10.59M08
    G76P020229Q100R0.1
    G76X53.83Z-95.P2600Q600R13.5F5.08
    G00Z10.
    G00Z200.X200.
    M30

    PD: Sorry for the bad english, is not my mother tongue
    Last edited by Emdemaq; 06-17-2021 at 03:28 PM.

  2. #2
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    OK, you need to do one of two things - put the machine into G98 (IPM) mode and calculate thread pitch by dividing RPM/# of threads per inch, - OR - put the machine into G99 (IPR) mode and calculate thread pitch by dividing 1/# of threads per inch.

    It "looks" like you're trying to thread using the first formula but the machine is in IPR mode and not happy with the thread lead.

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    I tried what you said but can you explain me where I put the G99 or G98? I inserted in the start of the threading operation but nothing changes. Also, as can you figure I use the G76 to thread.

    Regards

  4. #4
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    Quote Originally Posted by DouglasJRizzo View Post
    OK, you need to do one of two things - put the machine into G98 (IPM) mode and calculate thread pitch by dividing RPM/# of threads per inch, - OR - put the machine into G99 (IPR) mode and calculate thread pitch by dividing 1/# of threads per inch.
    Looking at the X values and the feedrate, it looks to me that he is working in metric.
    Alarm 011 can also mean the feedrate is inadequate.

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    Your Puma might be set up to use single line G76 commands. You can check to see if parameter 1, bit 1 is labeled "FCV". If you have this parameter, and it has a value of 1, then the machine is currently set up for single line G76 commands. To use the two-line G76 command from your Lynx, change this parameter to 0. Or, you could change your program to use the single line G76 format.


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