KOMPAS-3D v24

If the transfer of A constituent part does not have a visual representation (i.e. being just a set of properties and not associated with a component/solid), then in the BOM dialog for it, only the following options are available:

•specifying density (manual input or getting from the reference),

•manual input of the mass value (the specified mass in total product mass is not taken into account),

•selection of material from the list or from the reference,

•deletion of material designation.

The element

Description

Method of calculation

The list for selecting the method of calculation of the center of mass properties of the product or its constituent.

To the right of the list is the Recalculate CMP button.

The button is used to re-calculate the center of mass properties of the product or its constituent after changing the material, density or mass.

If the button is available, it means that information about the product/constituent CMP is not relevant. After you press it, the recalculation occurs, the information is updated, and the button becomes available.

By source data

This calculation method is not available when setting CMP of the product.

When setting CMP of the constituent, selecting this calculation method means:

•For a component — the mass value and the value of center of gravity coordinates are taken from the file of this component (in turn, they can either be calculated or entered manually in the file).

•For a solid — the mass value is calculated from the actual volume of the solid and the density set for the current model. The center of gravity of the solid is calculated from its shape, while the distribution of mass in the solid is considered homogeneous.

When selecting the calculation method By Source Data, the remaining dialog controls are not available.

By source mass

This method of calculating the center of mass is only available for a component.

The mass value is taken from the component's file. The component's center of mass and moments of inertia are calculated based on its current mass and position. If necessary, you can manually specify the center of mass coordinates and/or moments of inertia.

•To set the coordinates of the center of mass, set the Center of mass switch to position I (on) and enter the desired coordinate values ​​in the fields that appear.

•To specify the moments of inertia values, set the Moments of Inertia, g*mm2 switch to the I (on) position. The resulting table will display the calculated values ​​of the axial and centrifugal moments of inertia in the central coordinate system. Enter the desired values ​​in the corresponding table cells (the cells with the centrifugal moments Jxy, Jzx, and Jzy are not editable). You can return to the values ​​calculated based on the current mass and configuration of the component by clicking the Calculate Moments of Inertia button. ,located above the table.

Once the center of mass and/or moments of inertia have been manually set, changing the mass and/or position of a subassembly will no longer affect its center of mass and moments of inertia.

By density

Selection of this method means that you must specify the material density in order to calculate CMP.

You can specify the density value arbitrarily or get it from the reference. It depends on the status of the Value from reference button.

By default, this button is selected. In this case, the Density field is unavailable — the value is transferred to it from the density reference file or the Materials and Processes List application (depending on where the material was chosen from).

To enter the density value manually, depress the Value from reference button. The field Density will become available.

•If you configure CMP of the body, the specified density is used to calculate the mass of that solid only.
The center of gravity of the solid is calculated from its shape, while the distribution of mass in the solid is considered homogeneous.

•If you configure CMP for the whole product or subassembly, the specified density is used to calculate the masses of all solids that are built directly in the product/subassembly model and that do not have their own density or mass specified (i.e. the By Source Data option is chosen for them). If the model does not have such solids in it, the change in density will not affect its mass.
The center of gravity of the product/subassembly is calculated based on the current masses and positions of its components and solids.

By mass

Selecting this method means that to calculate the CMP it is necessary to specify the mass.

The mass value is specified manually in the Mass, deg field.

•If the center of mass of an entire product or subassembly is being configured, its mass is assumed to be a user-specified value. The masses of the product or subassembly's component parts (both specified and calculated) are ignored. The center of mass and moments of inertia of the product/subassembly are calculated based on the current masses and positions of its components and bodies. If necessary, you can manually specify the center of mass coordinates and/or moments of inertia. This is done in the same way as when using the By Source Mass method (see above).

•After manually specifying the center of mass and/or moments of inertia, changing the masses and/or positions of the product/subassembly's component parts will no longer affect its center of mass and moments of inertia.

•When setting a body's center of mass, the entered value is considered its mass (regardless of the body's material). The body's center of mass is calculated based on its shape, and the mass distribution within the body is assumed to be uniform.

•It is not possible to manually specify the center of mass and/or moments of inertia for a body.

By source copy data

This calculation method is only available for a constituent that is an array instance and means that the instance CMP are the same as those of the source array object.

Details...

By source execution

This calculation method is available for a product or its component part, which is using the option, and means that the mass-inertia properties of model are considered to be the properties calculated for the source execution.

Material

Field containing material designation.

The field is available if the Calculation Method selection list includes the By Density or By Mass options.

If required, the material designation can be deleted by pressing the icon .

Manual field filling Material is not possible, therefore to return the designation it is necessary to select the material again (see further).

Select material from list

The button to select a material from the the density reference file, which is used by the KOMPAS-3D system by default. Pressing the button, it opens Dialog Material Density Selection.

When you select the material using this button, hatch density and style are set automatically.

Select material from reference

The button to select a material from the Materials and Assortment Application.

When you select the material using this button, density is set automatically.

Hatch

A group of fields for setting hatch that will be used for the section/cut of the product or its constituent in the associative drawing.

Style

The field of hatching style. Filled in automatically after material selection. In this field, you can select style from the list and libraries.

Angle

The field of hatch angle. The field allows you to select values from the list or enter them manually.

Color

The field of hatching color. The default color is set in the hatch style (for system styles it is black). This field allows change of color.