No part is truly “weightless”. However, you may need to declare for a part with a value that can change depending on the size of the part.
Parts can have:
- A fixed chemical composition, but variable weight, and/or
- A variable chemical composition, but a fixed weight, and/or
- A variable chemical composition and variable weight
“Size” is also a term that may have multiple meanings depending on the Product. For example:
- A piece of wire will have the same materials, Bill of Materials, and chemical composition, but the length is variable and will dictate the size
- Adhesive will have the same chemical composition, but the volume used will dictate the size
Generating an FMD for a Part with Variable Weight
Using “Resin” as an example of a “weightless part”, enter the “Resin” as the Product in the declaration and then follow the steps below to enter the Product Details:
- Enter “Resin” as the New Product Name:
- Click to expand the Product Details section for “Resin”
The Item Name will be pre-filled.
- Enter a Mass of “1.”
- Select the Unit of Measure in mg or g (defining to the smallest standard unit).
- Enter a Number of Instances of “1.”
- Enter the Instances Unit Type as “Each.”
This will change depending on the Product or Sub-Product. For example, wire or cable will likely have an Instances Unit Type of “Meter.”
- In the Homogeneous Materials table, enter the substance information for “Resin”:
When calculating the amount of “Resin” used in the overall Product, use the substance information (% of each substance) and multiply it by the quantity of “Resin” found in the Bill of Materials for that Product.
Grams of Substance = g of Product x % of Substance/100
For example, 1 x 70/100 = 0.7 g
- Complete the remaining declaration and generate the XML.