# Help, I don't know how to calculate the total volume of my model

AutoSave_Hidden_Pillows.skp (1.1 MB)

If everything is solid (and there are no nested objects) you can just select all and read the volume in Entity Info.

I tried that but it doesnâ€™t work

Solid Inspector 2 says the object isnâ€™t solid, with surface border problems, and over 1000 internal faces.

Needs work to make it solid first.

how would i go about doing that?

Edit maybe those are pistons the vertical thingsâ€¦

Experiment with something simple first. For example, the pistons are close to being solids. Go into the pistons .Triple click on each and make all of each a group and put all the piston groups into one group so you can look at them alone (layers would help but that is another matter to work on). If a piston group does not read as solid, look closer. Some have interior walls, and those canâ€™t be solid. Remove the interior walls (or get rid of all those extra edges). Some may have stray edges (edges that are not bounding at least two faces). When you select a solid group representing a piston you can read the volume.

It will also be helpful to put all the edges and faces on Layer0. Then put the groups of objects-- cams etcâ€“on the different layers. Your layers are not helping because you donâ€™t have groups. +++All faces and edges on Layer0. Make groups of your objects. Assign the groups to the layers you add.+++

im really panicking as this is a project that is due tomorrow

and i cant figure out how to make them solids

could you do it so that you can show me how?

Hereâ€™s a file. organized the file a little for you. That would be the first step so that you can work with each part. If you need the parts (components) joined together a different way, you can explode them.

The pistons are in a component and youâ€™ll see they are each solid and a volume can be found. You will see I removed the edges up at the top of some of them and that was what they needed. The frame was pretty good, once separated, and made a group. Solid Solver fixed it.

I redrew the camshaft making sure it was all aligned to the axis. Because I made the axle as a separate cylinder as a solid group I was able to use solid tools union to join it to the cams (which were all instances of a component). I constructed the axle from the hole in the cam. Shaft 2 is the combination of the parts and Shaft 3 is all of it joined with the â€śunionâ€ť command. I didnâ€™t replace your shaft. Youâ€™d know better how to position it.

The other parts will be hard to make solid. They canâ€™t have all those intersecting parts. Think of a solid sort of like a plastic bottle or a balloon. It has a skin that can take all sorts of shapes but has to be watertight and not have anything else (no extra edges faces or groups etc. ) or holes in the faces. It shouldnâ€™t have interior faces. If I had to do this I would start over with those remaining parts carefully making solid objects.Hidden_Pillows X.skp (1.9 MB)

Hope you do well.

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