Motion-Dimension FB
Summary of Motion-Dimension FB
Use a Motion-Dimension FB to identify a Part you want to move with a specified motion.
Each Motion-Dimension FB may specify:
| • | An Angle between two Lines that are in different Parts and the Line's Point joined with a Pin-Joint - a Part becomes a . |
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| • | A Distance between two Points [at the end of two different Lines] that are in different Parts, and the Lines joined with a Slide-Joint - a Part becomes a . |
Rockers and Sliders are said to be Motion-Parts.
Add and Edit Motion-Dimension FB
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Toolbar:
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Menu:
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'Add Motion-Dimension FB' : to add this element, you must select 3 elements.
For detailed information see: Add Motion-Dimension FB.
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ADD:
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STEP 1: Add the Motion-Dimension FB to the graphic-area
The starts. You must select three elements: a Joint and the two sketch-elements.
The Rules are difficult to describe in full. Thus, for more details.
In summary, select, either a:
| • | Pin-Joint, then a Line in each Part that it joined with the Pin-Joint. The Part with the Line you select first must be kinematically-defined |
or a
| • | Slide-Joint, then a Point at the end of each Line and Part that is joined with the Slide-Joint. The Part with the Point you select first must be kinematically-defined. |
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EDIT:
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STEP 2: Open the Motion-Dimension FB dialog-box:
| 1. | Double-click the Motion-Dimension FB in the graphic-area or Assembly-Tree |
Note:The Motion-Dimension FB icons in the graphic-area are different to the icon in the :
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Motion-Dimension FB for a Rocker
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Motion-Dimension FB for a Slider
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- or -
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The Motion-Dimension FB dialog-box
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 Base-Value: in the image, the Base-Value is '75'
| • | This is the 'constant' contribution to the output of the Motion-Dimension |
The linear or angular value given to the Motion-Part when a wire is not connected to the input of the FB.
 Motion-Value: (motion-value at its input-connector) in the image, the Motion-Value is '9.15992104
| • | This is the 'motion contribution' to the output of the Motion-Dimension.
It is the motion-value at the input-connector of the Motion-Dimension FB.
The 'Motion-Value' regulates the position of the Motion-Part relative to the Base-Value. |
Base-Value + Motion-Value
| • | The actual motion-value given to the position of the Motion-Part |
| • | It is the output of the Motion-Dimension.
It is the total of Base-Value + Motion-Value |
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Directions
 Negate Motion-Values: Option to multiply the Motion-Values by -1.
Mirror the motion-values relative to the Base-Value. Click the
| ◉ | Positive Motion-Values check box [default], or |
| ◉ | Negative Motion-Values check-box |
 Negate Base-Values: Option to multiply the Base-Value by –1.
Mirror the start-position of the Motion-Part. Click:
| ◉ | Positive Base-Value check box [default], or |
| ◉ | Negative Base-Values check-box |
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Notes:
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The Positive direction of the Motion-Dimension.
When the Motion-Dimension specifies an Angle [Rocker]:
| • | The Positive direction is always the 'counter-clockwise' angle from the 'Fixed Part' to the 'Motion-Part' |
When the Motion-Dimension specifies a Distance [Slider]:
| • | The Positive direction is a function of the positive direction of the Lines that you use in the Slide-Joint. There is an arrowhead at the start of one of Lines in the Sliding-Joint that indicates its positive direction. |
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