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  1. #1
    Join Date
    Feb 2006
    Posts
    14

    Thumbs up HASS TL3B bull****

    All my attempts to make a internal thread 4'' 1/2 IF on a lathe HAAS TL3B failed.
    We used the latest tools Sandvik (inserts and antivibration bar), but in vain.
    Any regime would try cutting, vibrations occur after 4-5 passes.
    With the same tools and cutting regime achieved routinely or API IF thread Regular type without issues, what makes me think it is a problem with the lathe.
    The same can be said about the device Dorian is a joke for heavy machining ..
    Has anyone seen such a problem?

  2. #2
    Join Date
    Jun 2004
    Posts
    16
    I would agree that Dorian tool posts are junk.

    Just don't forget to try to fit the largest bar possible. Can you get a holder for a 2.0" threading bar? I believe there is no such thing as over kill.

  3. #3
    Join Date
    Feb 2006
    Posts
    14
    Sure, I used a 60 mm bar, but without results.
    Recently, I tried the same type of thread, but outside, at a distance of 700 mm from the main spindle, the material being supported by steady rest and of course that the vibrations are at home.
    Haas Sorry, but the type lathes and TL 4 TL 3B far give no yield at which they would expect someone to read the manufacturer's specifications.
    The same can be said about the SL40 and VF8.
    Used very good in my opinion are ST20BB, ST20, SL30BB, VF5-XT/50 and VF4.
    I say this with some skill, above all we used for various products and know their capabilities.
    Regards.

  4. #4
    Join Date
    Jun 2004
    Posts
    16
    Are you using an infeed angle when threading?

  5. #5
    Join Date
    Feb 2006
    Posts
    14
    Of course, including G32 and G92 variants cycles.

  6. #6
    Join Date
    Dec 2005
    Posts
    74
    You problem is my problem since 5 years ago. Look...
    http://www.cnczone.com/forums/haas_m...ns_tl-3_a.html

  7. #7
    Join Date
    Nov 2007
    Posts
    479
    you have adequate thread depth per pass? try increasing minimum thread depth per pass and/or sfm.

  8. #8
    Join Date
    Feb 2006
    Posts
    14
    I solved the problem. At least for internal threading. We built a device attached to a solid we Sandvik 60mm bar and can tap easily.
    Those from Brussels Haas sent me a block of metal .. they said to mount the stupidity of Dorian. Of course it did not work ...
    I have pictures and what resulted.

    Regards
    Attached Thumbnails Attached Thumbnails PIC041.jpg   Capture1.JPG   PIC066.jpg  

  9. #9
    Join Date
    Dec 2005
    Posts
    74
    Good job WEAR, and what about external thread? and what about tool change?
    Thanks,

  10. #10
    Join Date
    Feb 2006
    Posts
    14
    This is only a temporary solution, because those at the Haas :argue: tried to show me all the tools used are not suitable or cutting procedure is incorrect, in no case will recognize that the solution is not right with Dorian.
    For machining that is true OD / ID I ordered an electrical device controlled type turret with four posts in nc. It will arrive in late July of ... China.
    You add photos to the results.
    Regards.

  11. #11
    Join Date
    Jan 2005
    Posts
    1880
    I've had a similar problem in other lathes with the "lay-down" style threading holders. Just to check I switch to a top notch style which I believe has less engagement and different top edge geometry and the problem went away.

    I use mostly lay-down stuff because it is a more robust threading style bar but have the topnotch for wonky problems such as this.

    And I have had these same problems in a bunch of different lathes. mori, okuma, haas, dawaoou? and a really cheap chinees one I can't remeber the name too.
    thanks
    Michael T.
    "If you don't stand for something, chances are, you'll fall for anything!"

  12. #12
    Join Date
    Feb 2006
    Posts
    14
    For those interested: good results at the inner threading thread type IF, API REG I got the tool in the image (SECO)
    Attached Thumbnails Attached Thumbnails PIC004.jpg  

  13. #13
    Join Date
    Feb 2006
    Posts
    14
    As promised, back with photos of how we deal with the vibrations that occur in threading.
    So I bought one Replace Dorian from a company in China. It is much stronger and much more. You can use all four channels broadcast tools and indexing is controlled by a separate button. For the CNC control board relays must purchase from HAAS.
    I repeated with the same internal and external threading regimes which we have used the device Dorian and the result was excellent.:banana:
    Conclusion: Dorian is a joke and Haas should give up jokes on clients' money.
    Attached Thumbnails Attached Thumbnails DSCF0895.JPG   DSCF0897.JPG   DSCF0901.JPG   DSCF0908.JPG  

    DSCF0894.JPG   DSCF0904.JPG  

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