To calculate forces correctly, you must Configure the Power Source(s) correctly.
Each degree-of-freedom in each kinematic-chain receives its Power from an element.
We use the Configure Power Source dialog-box to make sure each kinematic-chain receives its Power from the correct element(s).
Power-Source elements can be:
•Joints (Linear or Rotary Motor)
Use this dialog when you want to calculate the Contact-Force between a Cam-Roller and 2D-Cam. The default Power-Source is at the Joint at which you add the Motion-Dimension FB for that kinematic-chain. In packaging machinery, the motion-dimension is most often at the Tool-Part and not at the Cam-Follower Part . You must use this dialog to move the Power Source element from the Tool-Part to the 2D-Cam. Only then will you be able to calculate the Contact-Force, Contact-Stress AND the forces in all of the Joints in that kinematic-chain.
Even if the kinematic-chain is only the Cam-Follower Part, you must use this dialog to move the Power Source element from the Cam-Follower Part to the 2D-Cam to correctly calculate Contact-Force and Contact-Stress of the Cam.
Configure-Power-Source in the Kinematics-Tree
To open the Configure-Power-Source dialog-box:
The Configure Power Source dialog-box is now open.
There are two tabs in the dialog-box:
Motion-Dimensions | Motor Element
The default Motor-Element for a Motion-Dimension is the Joint controlled by the Motion-Dimension.
Even if the default Motor Element is correct, please so these steps:
1.Click a Motion-Dimension
Before you do '2', below, make sure the Motion-Dimension is active.
The Motor Elements that can possibly drive the active Motion-Dimension show in the box below.
Each possible Motor Element is identified with a unique name and an icon.
2.Click a Motor Element
When you click a Motor Element, it shows to the right of the Motion-Dimension
MD14+: If there is a Conjugate-Cam in your model, you must do Add Conjugate-Cam FB . Then, the Conjugate Cam element is also a Motor-Element.
See also: Tutorial 13
If the kinematic-chain has two or more degrees-of-freedom - then you must choose the Motor Element for each Motion Dimension.
When you Show Force-Vectors, you can customize the Force-Vectors in the graphic-area.
For each Part, you can:
•Change the color of the Part-Outline and Force-Vector
•Display the Force-Vector:
a.from the Joint
b.as a Polygon of Forces
c.a and b
d.not a and not b
These options do not help me very much!