One of the guys here (Tom Stock) finally figured out a good way to put a flat length reference dimension in a sheet metal part and have it stay accurate, without the hassle of adding a line that is equation driven.
- In a sheet metal part, put in an unfold feature.
- Then start a sketch on one of the faces.
- In that sketch, insert a point at one of the corners, or put a construction line at one end, or something - you have to have a sketch entity.
- Put a dimension from that entity to the other end of the part.
- Exit the sketch.
- Put in a fold feature.
Now, when you fill in the config specific properties, you can pick that dimension for your length property, and it will update properly in the SW BOM.
WT