lynx 200 Question

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  1. #1
    Member Jorg_Aussie's Avatar
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    Default lynx 200 Question

    Hi all
    brief intro
    Live in Australia, Queensland, Goldcoast.
    I'm a qualified fitter turner with cnc experience since 1988
    Machine controllers used; Haas and Fanuc.
    Machine types
    Lathes Mill turn with c and y axis.
    3,4 axis vertical machining centers
    5axis horizontal machining center

    I'm hoping the knowledge bank here can help.
    I have recently got the use of a Daewoo Lynx 200 with 21tb controller 2 axis lathe.
    nicknamed "the nugget"
    so far I have changed from workshift to work coordinates aka G54,G55 etc
    type 2 turning cycle for plunge profile turning in G71
    drill pecking/clearance G83
    but cannot get rigid tapping to work.
    I have tried all the combinations of m29s*** before G84,in the same line etc
    but continue to get the same result
    G84 on it's own taps but for floating holder only.
    Engage the m29 the tap gets to the position and just does nothing apart from the spindle having some load/Resistance until I reset the spindle rotates freely.
    parameters I think are original install from factory, I have backed up the file several stages along the way

    My only experience with rigid tapping has been with Haas Machines, it's either on or off kind of feature.

    Q can this Nugget actually rigid tap?


    Regards
    Jorg

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  2. #2
    Member Mr-Li's Avatar
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    Default Re: lynx 200 Question

    Hi Jorg,

    In MDI mode, input M29S100, see if it alarms out.
    its' one indication that it'll either have or does not have rigid tap.

    Best regards,

    Wen.



  3. #3
    Member avongil's Avatar
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    Default Re: lynx 200 Question

    The Doosan documentation is awesome. Print this out:
    Download PDF Doosan NC Programming Manual for Turning Centers Fanuc 30 Series Controls - CNC Manual

    page 96 of the manual has the G84 cycle. It looks like its optional on 2 axis lathes. My old 2 axis Daewoos don't have it.
    If you don't have it then you will have to use a floating tap holder.

    https://i.imgur.com/qpBUhvf.png
    https://i.imgur.com/ec2nmBE.png



  4. #4
    Member DouglasR's Avatar
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    Default Re: lynx 200 Question

    Generally, any Doosan/Daewoo built AFTER 2011 will have rigid tapping as standard. It was optional before that.
    The MDI test is valid. If it alarms, you don't have it.
    All is not lost. You can tap in IPR mode (G99) and it's pretty close to rigid tapping.
    Let me know.



  5. #5
    Member Jorg_Aussie's Avatar
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    Default Re: lynx 200 Question

    Hi Thanks for the reply.
    I'll give it a go with the mdi option.
    from memory when m29s200 was programmed it just sat there with no alarm.

    I have also found a trouble shooting guide with parameters that are associated with rigid tapping,
    however they do not go into detail of how to set them.
    It would be good to see a copy of parameters from a 21tb lathe that has rigid enabled.

    Thanks avongil for the pdf , very interesting format for the g84 definitely will be testing this.

    DouglasR I have ordered a floating tap holder as a backup, fingers crossed it will rot in the cupboard.


    regards
    Jorg



  6. #6
    Member DouglasR's Avatar
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    Default Re: lynx 200 Question

    Very good. Let me know.



  7. #7
    Member Jorg_Aussie's Avatar
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    Default

    Quote Originally Posted by Mr-Li View Post
    Hi Jorg,

    In MDI mode, input M29S100, see if it alarms out.
    its' one indication that it'll either have or does not have rigid tap.

    Best regards,

    Wen.
    tried this and no alarm
    I see hope....



  8. #8
    Member Jorg_Aussie's Avatar
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    Default

    Quote Originally Posted by DouglasR View Post
    Very good. Let me know.
    "G97S250 M29 P11
    G99G84Z-0.625 F0.0625"
    I used this format but in metric
    again the machine gets to the position and sits

    attached is current parameters if anyone could shed some light ?
    regards
    Jorg



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