Announcement

Collapse
No announcement yet.

Challenge: a parametric scissors lift with multiple arms.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #11
    Originally posted by gaby424 View Post
    ...So Munkholm, please upgrade to V2 system
    Sorry Gaby, not sure that I understand what change you are suggesting...

    Anyhow, fixed the array issue (hate lazy bums) and even the spelling
    Attached Files
    Last edited by Munkholm; April 4, 2011, 12:23 PM.
    Klaus Munkholm
    "Do. Or do not. There is no try."

    Comment


      #12
      Holy Crap! You guys are beasts!!
      I'm looking at the finished formulas and I'm still confused. lol
      Dan

      Comment


        #13
        Munkholm, if you look at the attached pictures(.png) from my previeous post you will see a small difference between RobotV1 and RobotV2 arms system. At the V2 all the arms are in the same vertical plane. In V1 the arms are one in one vertical plane the next from above on the other vertical plane, the next again in the first vertical plane....etc. I think your example is like in RobotV1 typology. Today I observed that the pictures from Alfredo are like in RobotV2 typology. Anyway we don`t have to simulate it 100%.

        Hey Alfredo, where are the cookies?

        Comment


          #14
          Why do you guys do these things on the weekends!!! I am not at work on the weekend thus dont have access to Revit!!! /shakes fist!!!
          -Alex Cunningham

          Comment


            #15
            Thanks a lot guys, I planned to deal with such a :banghead: in the next weeks.

            Made a few detail enhancement on Klaus V1. and fixed a small issue with top connections when changing the car width.
            The bizarre thing is that with only 5 small extrusions, the size of the family is twice the original! i will post it if you ask for, cause probably not the best one.

            Congrats to you guys!:thumbsup:
            Attached Files
            Julien
            "Au royaume des aveugles, les borgnes sont mal vus!"
            P. DAC
            Follow me on Twitter @Jbenoit44 - Blog: http://aecuandme.wordpress.com/

            Comment


              #16
              Originally posted by gaby424 View Post
              ...Hey Alfredo, where are the cookies?
              Gaby, sorry, I was traveling, and now I'm back. These are my comments:

              Of course you win the cookies, and my nomination for the next run of the post of the month. Amazing. I have only one comment that would improve the usability of this family: I think the parameter that should be made available for users' input is "Platform Elevation", not "Arm Pairs" and "Arm Angle". Because the user is interested in lifting the platform to a certain elevation, like the guy in the picture who is working on the beam. It would be more comfortable to type the desired height you need rather than trying to figure out how many pairs of arms at how much of an angle you need to reach that height. Maybe this can be achieved by rearranging the formulas using the same terms in a different order.

              About the educational value of this solution, great! I see that you used the same technique that Munkholm used at his parametric clock in another thread (see Munkholm's clock), which is a technique that I did not understand back then, but just today, trying to figure out Munkholm's trick again, by reviewing your excellent solution to this challenge. It is a powerful solution that eliminates the need of using angular dimensions to make objects rotate.

              For whoever is interested, the technique mentioned above is this: (it seems simple once you explain it, but it is not obvious when you don't know; at least I did not know this). The arm in Gaby's solution in this exercise, and the clock pointers in Munkholm's clock, were done as sweep profiles in their own separate families. When you click on the sweep you see that Revit provides a built-in Angle parameter for sweeps. The angle is there already in the properties dialog. Just tie that parameter to a new angle parameter. Then, when the sweep is loaded into the host family, the scissors lift or the clock, you don't have to create an angular dimension anywhere to make the sweep rotate. Just tie again, that new parameter that you tied to the sweep's angle parameter, to a new local angular parameter in the host family. Now you can make the sweep (the arm or the clock pointer) rotate easily to any angle that you want. Excellent.
              Freelance BIM Provider at Autodesk Services Marketplace | Linkedin

              Comment


                #17
                Thanks Alf! This is a Revit lesson.:thumbsup:
                Munkholm is definitly a clever guy.

                The fact is, Revit can do anything you want, even if nobody (including Factory?) knows how to!!!

                BTW, First click on POTM for April.

                :wine:
                Julien
                "Au royaume des aveugles, les borgnes sont mal vus!"
                P. DAC
                Follow me on Twitter @Jbenoit44 - Blog: http://aecuandme.wordpress.com/

                Comment


                  #18
                  Alfredo. Great job at explaining the trick with profiles and sweeps, from the last challenge!

                  But a few comments to the above... For this exercise I opted not to use that technique, for two reasons.

                  1. I wanted the Scissor "Legs" at parametric length´s
                  2. Rotating past 180 degrees was not necessary.

                  Actually I havn´t used any angle parameters in the lift family... only a couple of triangle calculations based on Pythagorean theorem
                  Klaus Munkholm
                  "Do. Or do not. There is no try."

                  Comment


                    #19
                    I noticed this, not a single angle parameter. That is what got my mind working the most. :beer:
                    -Alex Cunningham

                    Comment


                      #20
                      Originally posted by gaby424 View Post
                      i hope is ok i call it robot. Didn`t know the exact term.
                      Great solution! And quick, haven't even got the time to look closely at the OP and it's already solved. Alf, you'll have to come up with more challenging challenges from now on...
                      Martijn de Riet
                      Professional Revit Consultant | Revit API Developer
                      MdR Advies
                      Planta1 Revit Online Consulting

                      Comment

                      Related Topics

                      Collapse

                      Working...
                      X