Forums >> Community >> Newbies >> Furniture Family Behaving Strangely

Tobobo

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Joined: Thu, Jul 26, 2012
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I'm very new to revit and after watching tutorial on creating a parameter family. I started my own, it is a bicycle shelter. The width needs to stay the same but the length can change.

I set up the relative dims and the flexing the length up and down works, until I type the original length into the length box. When I apply the length one of the 'wings' moves sideways, when I type a new length it returns to the correct place.

Any help would be much appreciated.

Thanks

Toby

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jlights

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Joined: Tue, Dec 18, 2007
146 Posts

I took a look at this family and didn't see it behaving badly. Can you be more specific? I tried a number of lengths and looked at it simultaneously in 4 different views, but didn't see anything amiss. Can you post  screen shot of the distorted family?

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jlights

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Tobobo

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The first image is the family before any changes, second is when i have extended the length to 10 metres.

The third is when I have re-entered the original length (8.350 metres)

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jlights

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Joined: Tue, Dec 18, 2007
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The problem is these "wings" are not constrained to anything so they will behave erratically. Why this doesn't happen with the other one, I don't know, but all geoemetry should be constrained to reference planes. Since the height of this structure doesn't change, you may do just fine by adding two vertical ref planes per wing and aligning and locking the edges to the RP's. Although the edges are not vertical, you can change them to vertical in the sketch so that you can lock them to the vertical RPs- the difference in the family will not be great enough for anyone to notice and it won't have a negative affect on anything, but it will help keep the family working properly.

If later you have a problem with them staying in place vertically, create a horizontal RP at the level of the top corner and in sketch mode, lock one the corners of the wing to it (tab until you get just the endpoint of the sketch line).

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jlights

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Tobobo

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Thanks for your help, I will make the changes as see if it makes a difference.

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