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script for creating geodetic parabolic disch

Discussion in 'Alibre Script' started by Kunstmaan, Jan 29, 2020.

  1. Kunstmaan

    Kunstmaan Alibre Super User

    I need some guidance on how to create a parabolic dish sing alibre script.

    Looking for a ols Wizo script but not able to find it

    Mareike
     
  2. NateLiqGrav

    NateLiqGrav Alibre Super User

  3. idslk

    idslk Alibre Super User

    Hello Mareike,
    you've asked this before...and i haven't seen new things here in the forum:oops:
    Myself has not done such a dome. The nearest from my side wasthis...
    Maybe you try to search for "Professional Dome Plans -- Building geodesic domes made easy."
    It sounds like a joke, but there you should find a lot of Infos...
    Regards
    Stefan
     
  4. Lew_Merrick

    Lew_Merrick Alibre Super User

    Hi Mareike -- A "geodesic" won't be much of a paraabola (except in the grossest of terms). A tue parabola has the (general) equation of X, AX²+B. Figuring out what your needed values of "A" and "B" will be the hardest part of the problem. Turning the resulting parabola into a "Geodesic" depends on the required overall accuracy. ??? -- Lew
     
    Kunstmaan likes this.
  5. Kunstmaan

    Kunstmaan Alibre Super User

    On the 'old' WIZO script website there was a paraboluic script and that is where I am looking for
     
  6. idslk

    idslk Alibre Super User

  7. idslk

    idslk Alibre Super User

  8. Lew_Merrick

    Lew_Merrick Alibre Super User

    Hi Stefan -- Either of your references get a parabola drawn -- but turnung it into a geodesic is a different issue. -- Lew
     
  9. idslk

    idslk Alibre Super User

    Hello Lew,

    you can trust me, i really know that, but i only want to point that you both have been disscussing about parabolic splines...
    and there is also this thread Look here :)
    and you have also been involved there too...
    and therefor i have recommended to search for
    Regards
    Stefan
     
  10. Lew_Merrick

    Lew_Merrick Alibre Super User

    Hi Stephan -- I admit that I often complain about the "inaccuracies" implicit in using a nominal cubic spline to approximate a (say) parabolic or (say) involute entity. A Wronskian curve creates a "better fit" for many such entities. This is a different (and much more complicated discussion) than answering Mareike's question. -- Lew
     

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