Kinematics-FB toolbar > Add Motion-Dimension FB

The Command-Manager has three selection-boxes.

Click a Joint (Slide-Joint or Pin-Joint)

Click a solved Line or Point (in a Green Part)

Click an unsolved Line or Point (in a Blue Part*)

Notes:

are Lines if is a Pin-Joint

are Points if is a Slide-Joint

is a Line or a Point in a Green Part

is a Line or a Point in a Blue Part, a Free-Part

The icon of the FB in the graphic-area is different to the icon in the Kinematic-FB toolbar.

The Motion-Dimension FB in the graphic-area that identifies a Rocker

The Motion-Dimension FB in the graphic-area that identifies a Slider

Prepare the model so that these elements have these properties.

Preparation example:

•Pin-Joint

•The Points at Pin-Joint are at the ends of Lines.

•Lines in two different Parts that radiate from two Points

•Part is a kinematically-defined Part (Green Part-Outline).

•Part is a free Part (Blue Part-Outline)

Kinematic FB toolbar > Motion-Dimension FB (right of Graphic-Area >>)

Element #1: PIN-JOINT

The Pin-Joint is a joint between two Parts, and:

•One Part is a kinematically-defined Part

•One Part is a free Part

Elements #2 and #3: LINES

Each Line must be a child to a Point that is also a child to the Pin-Joint (Element #1)

•Element #2: a Line in the kinematically-defined Part

•Element #3: a Line in the free Part

Click in the Command-Manager

Result: a Rocker

A Motion-Dimension FB to specify the angle between Lines, Elements #2 and #3

The dimension is an Orange color in the graphic-area.

Kinematics-Tree for a Rocker

When we add a Motion-Dimension FB to a Pin-Joint, we identify it as a Rocker in the Kinematics-Tree.

The kinematic elements are:

•'Part' + 'Pin-Joint' + 'Motion-Dimension' = 'Rocker'

Note: There are two different mouse-actions:

To move the

To move the

Hover(FB)= move your mouse above the FB icon.

DRAG = Mouse-Button-Down, and move your mouse-pointer, Mouse-Button-Up

Prepare the model so that these elements have these properties.

Preparation example:

1.Two Parts  

One is a kinematically-defined Part (Green Part-Outline)...the Base-Part

The other is a free Part (Blue Part-Outline)

2.The two Parts are joined... with a Slide-Joint

Note : the Points are the start-Points and end-Points of the Lines that are selected for the Slide-Joint

Kinematic FB toolbar > Motion-Dimension FB (right of Graphic-Area >>)

Element #1: SLIDE-JOINT

The Slide-Joint is a joint between two Parts

•One Part is a kinematically-defined Part

•One Part is a free Part

Elements #2 and #3: POINTS

Each Point must be a child to a Line that is also a child to the Slide-Joint. (Element #1)

•Element #2: a Point that is a start-Point or end-Point of a Line in the kinematically-defined Part

•Element #3: a Point that is a start-Point or end-Point of a Line in the free Part

Click in the Command-Manager

Result: a Slider

The Motion-Dimension FB to specify the linear distance between Points, Elements #2 and #3

All Parts are now kinematically-defined Parts

The dimension is a Gold color.

Kinematics-Tree

When we add a Motion-Dimension FB to a Slide-Joint, we identify it as a Slider in the Kinematics-Tree.

The kinematic elements are:

•'Part' + 'Slide-Joint' + 'Motion-Dimension' = 'Slider'

Note: Two(2) different mouse-actions in the graphic-area

To MOVE the

To MOVE the

Hover(FB)= move your mouse above the FB icon.

DRAG = Mouse-Button-Down, and move your mouse-pointer, Mouse-Button-Up

You cannot specify the initial position of the Motion-Part as you add a Motion-Dimension FB.

To edit the initial position of the Motion-Part - we call it the Base-Value - we must open Motion-Dimension FB dialog-box.

To edit the Motion-Dimension FB:

1.Double-click the Motion-Dimension FB in the graphic-area

The Motion-Dimension FB dialog-box opens.

2.Edit the:

oBase-Value

- or -

oBase-Value + Motion Value

It is best to think of the:

•Base-Value as the position of the Motion-Part when a wire is not connected to the input-connector.

•Base-Value + Motion-Value as the position of the Motion-Part when a wire is connected to the input-connector.

 Directions  separator, there are options to:

•Edit the positive direction of the Base-Value

•Edit the positive direction of the Motion-Values.

STEP 1: Add two Linear-Motion FBs to the graphic-area.

STEP 2: Add a Graph FB to the graphic-area

STEP 3: Connect a wire from the Linear-Motion FB(1) to the Graph FB X-axis (the bottom connector).

STEP 4: Edit the Base-Part and add a Line

STEP 5: Add a Part and a Pin-Joint to join one end of the Part to the end of a Line in the Base-Part.

STEP 6: Add a Motion-Dimension FB to identify the Part as a Rocker.

STEP 7: Connect the other Linear-Motion FB(2) to the Motion-Dimension FB, and from the Motion-Dimension FB to the Graph Y-axis

STEP 8: Double-click Linear-Motion FB(2) ; edit the Phase Offset to 30

STEP 9: Double-click Motion-Dimension FB ; edit the Base-Value to 110

STEP 10: Double-click Graph FB to show the plot of the variables.

The image shows the elements in the graphic-area after Steps 1-10 - I have arrange the image to help

The Linear-Motion FB(1) adds 30 to the MMA.

We have connected a wire from the Linear-Motion FB(1) directly to Motion-Dimension FB

We have connected a wire from the Motion-Dimension FB directly to the Y1 input of the Graph FB.

The Motion-Dimension dialog-box and the Graph FB are open.

The Base-Value of the Motion-Dimension is 110º in the Motion-Dimension dialog-box.

The Master-Machine-Angle (MMA) is 120º

Thus, the output from the Linear-Motion FB is 120º + 30º = 150º.

Thus, the input to the Motion-Dimension FB = 150º.

The Base-Value  is 110º.

Thus, the Rocker angle is at 110º + 150º = 260º.

The output from the Motion-Dimension FB is also the input to the Graph FB.

When you open the Graph FB, the vertical cursor is at the MMA.

If you set the cursor to 120º, the Y-axis value is 260º.

The Graph shows a plot of the output of the Motion-Dimension FB(y-axis) against the Linear-Motion FB(X-axis)

The DRO shows the X-axis (cursor) is at 120º, the Y-axis Output is at 260º.