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Thread: cutting a radius

  1. #1
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    cutting a radius

    i'm trying to cut a radius on the front of a part. it looks like a tit on the front.
    G1X-.015
    G3X.0458Z.015R.025
    G1X.114
    X.196Z.056
    I'm using tool noise comp but when i add the g41 it does even go anywhere close to the part. i'm using a .007 rad insert.


  2. #2
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    Radius

    Can I see the whole program?
    What you are showing will error out on my CNC code anylyzer.


  3. #3
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    T1414(FINISH FACE)
    G99G97G40
    G0X.3Z0.0
    G1X-.015
    G3X.0458Z.015R.025
    G1X.114
    X.196Z.056
    X.3
    G28U0

    (i also tried this & it didnt work)
    T1414(FINISH FACE)
    G99G97
    G0X.3Z0.0
    G1X-.015
    G0W-.05X.05
    G41X0Z0
    G3X.0458Z.015R.025
    G40G1X.114
    X.196Z.056
    X.3
    G28U0

    Thats all of the block that i can remember. i'm at home now. i made the post while at work. i know i have to use the G41 but when i but it in i get an alarm. it tells me that it cant complete the block but alarm book doesnt give me a fix. just tells me to edit the program. the only thing i can tell you now is that its got a .025 radius on the center of the face then it should radius into the face of the part then face up to .114 dia. then cut an angle at a 45 degree to a dia. of .196 which is past my .193 dim that is my thread major.

    one other thing that i might have wrong. the direction that tool is pointing in the geometery page. the book indicates that it should be pointing to the 4 but the guy that programmed the machines before me had it as a 3 which in the book it shows 3 to be a backturn. i'm using a 35 degree front turn with a .007 radius. i dont know if this helps but it still dont work.


  4. #4
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    try this

    T1414(FINISH FACE)
    G99G97G40
    G0X.3Z0.0
    G1X-.015
    G3X.0458Z.015R.015 (you do have R.025)
    G1X.114
    X.196Z.056
    X.3
    G28U0


  • #5
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    ???

    What size Radius are you trying to cut? And I take it the front of the part is not your Z0.? Your best bet is to program not using cutter comp it sucks on lathes....


  • #6
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    turning radius

    use g42 instead of g41 for external turning


  • #7
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    turning radius

    and make sure to have proper tool position in offset pagerobably t3


  • #8
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    cinomarra is correct. You need g42.


  • #9
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    Are you using a sub spindle?
    Because it's rare that i see a lathe that is Z positive towards the chuck unless it's a sub chuck.
    If your trying to go CCW then your gonna go the long way around.


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