Spring Force FB

Use a Spring-Force FB to impose a force to act between two Points that are in two different Parts. The two Points are the Spring's 'Anchor-Points'.

Use the Spring-Force FB dialog-box to edit the Spring's force parameters.


Forces toolbar > Add Spring-Data FB


Add menu > Forces sub-menu > Add Spring-Data FB


Spring-Force FB dialog-box.

How to add:

1.Click Forces toolbar > Add Spring Force FB
2.Click two different Points in the graphic-area - one Point in two different Parts.

The Spring FB and the symbol of the Spring is now in the graphic-area.

The Points you select for the spring are termed the Spring's Anchor Points.


Spring-Force FB Symbols in graphic-area.

The Spring-Force FB element has three symbols in the graphic-area:

Symbol 11s-red: FB - see below Spring-Force FB connectors
Symbol 22s: Spring is between the spring's anchor-points
Symbol 33s: Dimension between the spring's anchor-points.

Spring-Force FB1s


Top: Distance, Velocity, Acceleration between the spring's anchor-points.
Bottom: Total Force, Force-X, Force-Y between the spring's anchor-points.


If you want the output from the Force FB to be a function that you cannot define with parameters in the Spring FB dialog-box, you must apply a Force 'function' at the input-connector.
The data-values at the input-connector to the Spring must be Force units, [SI Newtons]. Specify units of a data-channel [wire] with a Maths FB, and make the Output Data Type as Force [N].
The variation of the Force data-values can be any function.

For example, the output from a Motion FB, and via a Maths FB, can define the Force 'function' between the Spring's Anchor-Points.


Spring Force FB in the graphic-area.

The Spring-Force FB can be in three different states:

State 1: Active Spring-Force FB

This is the 'default' setting.


State 2: Disabled Spring-Force FB

Use the Spring-Force FB dialog-box to disable the 'spring'.



State 3: Linear Motor

Use the Configure Power Source dialog-box to select the Spring as the 'Power Source', and it becomes a Linear Motor.

tog_minus        How to Open the Spring-Force FB dialog-box


To open the Spring-Force FB dialog-box:

1.Double-click the Spring-Force FB in the graphic-area1s-red

- or -

1.Double-click the Symbol of the Spring2s in the graphic-area - see image


...see 'How to open a Dialog-Box'

Tutorial and Reference Help Files for MechDesigner and MotionDesigner 13.2 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd