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Examples of setting the component CMP (By mass method) |
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Let’s assume that a conventional model of motor (e.g. with no details and elements) is inserted in the assembly, while the mass and center of gravity coordinates of the model differ from the standard values. To obtain the correct mass-inertia properties of the assembly we need to use the standard CMP parameters of the motor.
This can be achieved in two ways:
•By entering and storing the standard CMP parameters in the motor model (i.e. in the component file),
•By entering and storing the standard CMP parameters of the motor in the assembly.
Example 1. Entry and storage of the CMP parameters in the component file
1.Open the motor model, select the first element of the Design Tree and call the Model properties 
from the context menu.
The properties modification elements will appear on the Parameter Toolbar.
2.Expand the CMP calculation section and select the By mass 
option from the Method of calculation list.
3.Enter the value of the standard motor mass in the Mass, g field.
4.Set the Center of Gravity toggle switch to I (enabled) and enter the standard coordinates for the motor center of gravity in the Coordinates field.
5.Press Create Object 
button.
6.Save the model.
The configured CMP parameters will be stored in the motor model and transferred to the assembly. Model editing – adding or deleting the material – does not influence the center of gravity coordinates that were entered manually.
Example 2. Entering and storing the CMP parameters of a component in the assembly
1.Open the assembly that contains the motor model as a component.
2.Select the Motor component in the assembly Design Tree and call the Component properties command from the context menu.
The properties modification elements will appear on the Parameter Toolbar.
3.Expand the CMP calculation section and select the By mass option from the Method of calculation list.
4.Enter the value of the standard motor mass in the Mass, g field.
5.Set the Center of Gravity toggle switch to I (enabled) and enter the standard coordinates for the motor center of gravity in the Coordinates field.
6.Press Create Object button.
7.Save the assembly.
The configured CMP parameters of the component will be saved in the assembly and will be used in calculation of the CMP. No changes will be made to the motor model; the calculated values of the mass and center of gravity coordinates will still be stored in the model.
See Also
