Can I to add measures of the Part Bounds in the BOM List?

pablo_indias_salguero

Hi everyone,

I really like the automatic table generated in Part Studio files that shows the Part Bounds — specifically the length, width, and thickness. I find this very useful and would love to include these dimensions in the BOM list of an Assembly.

Is there a way to do this automatically, or has anyone found a good workflow to bring these dimensions into an Assembly BOM?

Thanks in advance!

Caden_Armstrong

You can use computed properties:
https://www.onshape.com/en/resource-center/tech-tips/using-computed-part-properties-in-onshape

You can adapt the example in the article to use a bounding box instead of the volume calculation.


If you don't feel comfortable with featurescript, I sell a large library of computed properties (featuring lots of common computed properties):
https://fs.place/Listings/HUK1UHJF8EQ6HS1NEVJ2SWH4BI1TOMT1

MichaelPascoe

.

What Caden said is the way to go. I recommend saving yourself some time and getting his library of computed properties.

There are other ways too. With Onshape, there are usually multiple ways to do things. Another way is to use the Measure Cut List feature to assign the part dimensions to the Description or Name property of the part.

If you want even more control, it's also possible to measure the boundary of a part (Aligned Bounding Box) and set normal properties or custom properties with the Property / Attribute custom feature.
.

pablo_indias_salguero

Hi, thanks for your response.

I'm trying to do what Caden_Armstrong suggested, but I don't know where the problem is in my code.
I've coded before, but never in FeatureScript. Here's my code — could you please help me?

This is my code:

FeatureScript 1691;
import(path : "onshape/std/common.fs", version : "1691.0");
import(path : "onshape/std/math.fs", version : "1691.0");
import(path : "onshape/std/computedPartProperty.fs", version : "1691.0");
import(path : "onshape/std/properties.fs", version : "1691.0");
import(path : "onshape/std/evaluate.fs", version : "1691.0");

annotation { "Property Function Name" : "computeDimString" }
export const computeDimString = defineComputedPartProperty(function(context is Context, part is Query, definition is map) returns ComputedPartProperty<string>
{
    const orientation = WORLD_COORD_SYSTEM;
    const bounds is Box3d = evBox3d(context, {
        "topology" : part,
        "cSys" : orientation,
        "tight" : true
    });

    var dimensions = [
        bounds.maxCorner[0] - bounds.minCorner[0], // X
        bounds.maxCorner[1] - bounds.minCorner[1], // Y
        bounds.maxCorner[2] - bounds.minCorner[2], // Z
    ];

    // Ordenar de mayor a menor
    dimensions = sort(dimensions, function(a, b) { return b - a; });

    return {
        value : toString(dimensions[0], "mm") ~ " x " ~ toString(dimensions[1], "mm") ~ " x " ~ toString(dimensions[2], "mm")
    };
});

Thanks

MichaelPascoe

Looks like your return type and your return are not quite right.

The return type should be String if you are returning a string.

The return itself should look like this:

return toString(dimensions[0], "mm") ~ " x " ~ toString(dimensions[1], "mm") ~ " x " ~ toString(dimensions[2], "mm");