What are Assembly Arrangements?

Assembly Arrangements allow sub-assemblies, used in a higher-level assembly, to be shown in alternative positions or with alternative content, but without having to create a completely new assembly file.   

An example: 

  • A valve assembly is used 2 times in a higher-level assembly.
  • To establish intention, it is required to show one valve open, and the other valve closed.
  • The Parts List needs to show that they are both the same, that is a single reference with a quantity of 2.

This is an application for assembly arrangements

Start with creating the valve assembly with the default configuration being ‘Open.’ Then create a second arrangement, moving the components necessary to show the valve as being ‘Closed’ and save as another Arrangement, ‘Closed.’

When adding the valve assembly into a ‘Where Used’ assembly you have the choice of adding the valve using either Arrangement.

This allows more than one valve to be used in the assembly, using either Arrangement, and the Parts List will see the valve assemblies as the same part file.

Let’s look at another example, in more detail.

A clamping vise

We will make 3 arrangements. Fully Open, Fully Closed and Mid position

Before we begin, note this assembly has been opened with options of:

Load: From Folder

Scope: All Components and Fully Load

This assembly has also had its parts positioned with assembly constraints

Let’s begin:

Examine the existing assembly constraints in the Constraint Navigator:

  1. Click the Constraint Navigator tab on the Resource bar.
  2. Right-click just inside the left edge of the Constraint Navigator panel and choose Group by Component Status in the context menu.

This will organize the list of components into folders based on their constraint status.

 

 

The constraint navigator will look like this

We have expanded the Fully Constrained and Fixed Folders

The fixed jaw, moving jaw and slider sub- assemblies are fully constrained

Look at the top-level assembly next

Top-Level Assembly 

Reviewing the constraints, the subassemblies have been placed and referenced to the fixed jaw

Lastly, a distance constraint has been added

This distance constraint will be made Arrangement Specific, and its parameter will be set within the desired configuration

Set parts/sub-assemblies to be arranged to ……..Individually Positioned

Open the Component Properties with a Right-Click

Then select the Position in Used Arrangement to Individually Positioned under the Parameters Tab.

Do this for each sub-assembly

Now we can create our Arrangements

Earlier we described our arrangements as open, closed and mid position driven by the distance constraint

Right-click on the distance constraint, and make it Arrangement Specific

Note the icon, before……

Note the icon, after……

Next, Right-Click on the Top-Level assembly, as this is where we create the arrangements

With our arrangements defined, next step is to edit the distance parameter

  • In this example, we are modifying the arrangement specific distance constraint Right-Click on the Distance (arrangement specific) constraint, and edit in arrangements

This is why we copied each arrangement.

Now set expression value for distance in each arrangement

Set distance values….

Uncheck Shared State

Uncheck Arrangement 1

Verify States

Closed

Mid-position

Open-full

There are many other options, such as suppressing components that also may be used in assembly arrangements.

Your turn!

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Post by Desiree Cothrine

Multimedia Designer | Swoosh Technologies

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