Instances

A Parent Part can have multiple Instances of the same Child in its BOM. It may be necessary to identify information about each instance. For example, an assembly (Parent) can be fastened using several of the same bolt. It may be needed to specify the location of each instance.

The Part BOM form contains the Instances relationship tab. This relationship tab displays the properties of each Child Part Instance for its identification in a BOM:

• Reference Designator – This is a unique Instance label. The Reference Designator data is used primarily in electronic diagrams. For example, a circuit board consists of four Instances of the same resistor. Each Instance has its own Reference Designator to identify it unambiguously within the electrical schematic or on the printed circuit board.
• X – This is an X coordinate of Instance location in the assembly.
• Y – This is a Y coordinate of Instance location in the assembly.
• Z – This is a Z coordinate of Instance location in the assembly.
• Angle – This is an angle of Instance location in the assembly.
• Side – This is from where (Top or Bottom) the Instance location is measured.

To specify Instances of a Child Part in a BOM:

1. Claim the Parent Part.
2. Open the Part BOM relationship as described in Part BOM Relationships.
3. Click Edit on the Part BOM toolbar.
4. Click New BOM Instance on the Instances relationship accordion toolbar. A new row appears in the Instances table.
5. Click on the corresponding cell in the row to enter the appropriate information.
6. If it is necessary to remove an Instance:
   
   1. Click the Instance to select it.
   2. Click Delete BOM Instance on the Instances relationship accordion toolbar.
   3. On the Part BOM toolbar, click Save. The Instance disappears.
   Note

   The Instance disappears immediately if you do not save the Part BOM after it was added.

7. On the Part BOM view, in the Reference Designator text box, enter a comma-separated list of Reference Designators for all the Instances.
   

   

   

   Figure 41.
8. On the Part BOM toolbar, click Done.
9. Go to the Parent Part form. The list of Instances is displayed in the corresponding Child’s row.
   

   

   

   Figure 42.
10. Unclaim the Parent Part.