Spring FB
See also: Spring FB dialog-box
Use a Spring FB to add a force between two Points that are in two different Parts.
The Forces a Spring FB can exert include:
•Spring Force - a force proportional to the difference of the distance between the Spring's Anchor-Point and its Free-Length.
•Constant Force - a constant force that only pulls or only pushes the Spring's Anchor-Points, throughout the machine-cycle.
•Coulomb Constant-Force - a constant force that acts in the opposite direction to the relative velocity between the Spring's Anchor-Point.
•Drag-Force - a force that is proportional to the relative velocity between the Spring's Anchor-Points.
•Drag-Force-Squared - a force that is proportional to the square of the relative velocity between the Spring's Anchor-Points.
See Spring FB dialog box to edit these parameters.
Terminology:
Anchor-Points : |
The two(2) Points that define an axis through which the Force FB applies its Force. |
Force element : |
A Spring FB is a Force-Element. |
Linear Motive Force : |
The Spring FB can become the Power-Source. It will indicate the Equivalent Linear Force that is needed to drive a Kinematic-Chain. A Linear Motor would need to provide this Force. |
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Forces toolbar > Add Spring FB |
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Menu : |
Add menu > Forces sub-menu > Add Spring FB |
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Dialog-Box : |
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How to add : |
1.Click Forces toolbar > Add Spring FB 2.Click in the graphic-area, two different Points in two different Parts. The Spring FB and its symbol are now in the graphic-area. The Points you select for the spring are its Anchor Points. |
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Spring FB : symbols in graphic-area. The Spring FB element has three symbols in the graphic-area: Symbol Symbol Symbol Spring FB Connectors Output-Connectors •Top: Distance, Velocity, Acceleration of the dimension between the anchor-points. •Bottom: Total Force, Force-X, Force-Y between the anchor-points. Input-Connectors - see more at Spring FB dialog-box •Add a user-defined Force Function •The data at the input-connector to the Spring must be Force units, (SI Newtons). •Convert any data-type and units with a Math FB, and use Force as the Output Data Type. •Positive (Negative) value will Pull (Push) the Anchor Points together (apart). |
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Spring FB in the graphic-area. The Spring FB can be in three different states: State 1: Spring FB is enabled The default state. |
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State 2: Spring FB is not enabled To disable the Spring FB, 1.Edit the Spring FB to open the Spring FB dialog-box 2.Deselect the Enable Check-box. 3.Click |
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State 3: It is a Linear Motor To change the Spring as a Linear-Motor: 1.Edit a Kinematic-Chain to open the Configure Power Source dialog-box 2.Click the Motion-Dimension FB that applies to the kinematic-chain 3.Click the Spring as the Power Source, and it becomes a Linear Motor. 4.Close the Configure Power Source dialog-box. |
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