See Add Spring FB
Use a Spring FB to apply a force between two Points. The name we use for the two Points is Anchor-Points.
Note: It is not necessary to connect a wire to the input-connector or from the output-connectors of the Spring FB. The input and output-connectors provide extra functionality - see Here
The Spring dialog-box is now open.
☑ Check-box to enable the Spring FB.
Spring-Length is the distance between the two anchor-points.
The Force always tries to move the anchor-point to the Free-Length (They cannot, of course).
Coulomb Friction Force: (Ff = μ.Fn )
This parameter is intended to be similar to a Friction Force. However, it is not Friction Force, because the Coulomb Friction-Force parameter is not a function of the Normal Force.
Viscous Coefficient: (Fv α V ( N/(mm/s) )
E.g. If the Damping Coefficient = 4 and the Velocity is +100mm/s, (anchor points moving away from each other), The force pulling the points together is a force of 400N.
Drag Factor: (Fd α V2) ( N/((mm/s)2 ) )
E.g. If the Drag Factor = 4, and the Velocity = +100mm/s (anchor-points are moving apart), then the force pulling the anchor-points together is a force of 40000N.
Connect a wire to the input-connector to add a force-function between the Spring's Anchor-Points.
The units of the data at the input-connector must be Newtons. Use a Math FB to convert the data-type of the Motion data-type to the Force data-type.
For example, the function might be designed as a motion. In which case, you would need to connect the output of a Motion FB , which has units of mm or degrees to a Math FB to convert the units to Newtons. And then connect the output to the Spring-FB
Units inside the Math FB become SI units. To convert 100mm at the input to a Math FB to 100N, you must:
1.Change the Output Data Type to Force (N)
2.Multiply the input-value by 1000 to convert 0.1m to 100N
Dimension, Velocity and Acceleration relating to the distance between the Spring's anchor-points.
Total Applied-Force between the Spring's anchor-points.
oTotal Applied-Force = Force at the Input-connector + Force that results from the parameters as set in the Spring FB dialog-box
oDriving-Force = Linear Motive Force, if you configure the Spring FB as a Linear Motor - see Configure Power Source