Dynamic blocks for cable trays supports

[luigiverdenico]

Hi all,

I created a dynamic block to design the supports of metal cable trays.
This block consists of an element that represents the vertical profile to which I have associated a linear parameter "stretch" called Lp to modify the length of profile and a second element which represents the bracket to which I have associated a linear parameter "move" called H to modify the distance of the bracket from the ceiling. I would like that fixed H, Lp changes automatically so that Lp = H + 150 mm. Is it possible?

Thanks

[Libbya]

Yes.  Post the block.

[luigiverdenico]

ok

[j.palmeL29YX]

In the other forum I had already asked you to post your dwg file. Why have you still not attached it?

EDIT: ok, now it is done.

[luigiverdenico]

Because I didnt know there is a specific forum for dynamic block so I preferred to attach it here. If you are a moderator , you can delete post in the other forum.

[Libbya]

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@luigiverdenico wrote:

Hi all,

I created a dynamic block to design the supports of metal cable trays.
This block consists of an element that represents the vertical profile to which I have associated a linear parameter "stretch" called Lp to modify the length of profile and a second element which represents the bracket to which I have associated a linear parameter "move" called H to modify the distance of the bracket from the ceiling. I would like that fixed H, Lp changes automatically so that Lp = H + 150 mm. Is it possible?

Thanks

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I think your units are incorrect or you have drawn it incorrectly.  The entire vertical profile is drawn as 1mm in height yet you ask that the LP be H+150mm.  Are the units of the drawing supposed to be meters?  Even then it still doesn't make sense.  With units as meters, the as drawn dimensions are Lp = H + 750mm.  Please adjust the drawing, units, and your formula so that they all agree.  At that point, just use a single vertical linear parameter and add both stretch and move to it.  See screencast.