Incorrect Family Geometry loading in Project

[Anonymous]

I made a family and loaded it to a project file. The loaded geometry shows a little incorrect. It doesn't show that same incorrect behaviour in family though. I tried figuring out, also redoing the whole thing again multiple times, but no success. May I ask some help, what might be wrong?

FamilyTrialsDoubt2.rvt

[Sahay_R]

What exactly is it that looks incorrect? Can you be specific, possibly add a screenshot so I know exactly what it is that you see? Because when I look at the project and the family side by side, the geometry looks identical.

[barthbradley]

No offense @Anonymous, but it's not a very well constructed family. The only "good" parameter is "Mounting Height". The others you can do away with, or constrain them properly so they flex without breaking the family. 

[Anonymous]

The sweep seems all well in the family. But when loaded in a project file, it protrudes out like this. For situations like this I have found a simpler way - of making a separate family of the Bib **** and loading it into the Wash Basin Family. But am posting here to find out where things going wrong in my construction, should there be a complicated situation like this somewhere else, where loading another family may not be best.

Many Thanks for your attention.

[Anonymous]

@barthbradley, offense not taken. Am here to learn and on the way document my difficulties so it becomes easier for others facing same learning steps. If you could offer some tips, I would grab them with both hands

Intention is to make these families as light (small file size) as possible without compromise on parametrics, and renderings. Am learning my way up.

[ToanDN · Accepted solution]

When the wall thickness changes, the sink flexed erratically.  This is the most common mistake when modeling wall based family.

I would approach modeling the family like this:

- model the faucet as a plumbing fixture family.  It can be face based, workplane based, or non-host, doesn't really matter much.

- model the sink as a plumbing fixture, non-host.  

- load the faucet in the sink family, place it on the sink and constrain it

- it should be enough if you don't need the family to be wall based, and manually constrain it in project

- if you do want a wall based solution, create another wall base plumbing family, no geometry

- load the sink above in and constrain it to the reference plane on the placement side of the wall

- load this wall based family in project and I guarantee you are free of constraint errors or geometry shifting unexpectedly

[Anonymous]

@ToanDN, you are GOD