Step 5.3: The Motion-Dimension FB

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

a Line or a Point in a kinematically-defined Part. The Parts have a Green Part-Outlines

a Line or a Point in a Free-Part [a Part that is NOT kinematically-defined]. The Parts have Blue Part-Outlines.

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

The Motion-Dimension FB that identifies a Rocker

The Motion-Dimension FB that identifies a Slider

PREPARATION:

Before you can add the Motion-Dimension FB, you must have, at minimum of:

1.

Two Parts

and

2.	A Pin-Joint

3.	The Pin-Joint joins Points from Lines in each of the two Parts

Two examples to the left:

SELECT ELEMENTS: Element 1: PIN-JOINT

Kinematic-FB toolbar > Add Motion-Dimension FB

In the Command-Manager: You have the option to select a Pin-Joint or a Slide-Joint as the first element.

For the Part to become a Rocker, you must select a Pin-Joint.

Rule 1 [Rocker]

The Pin-Joint joins a kinematically-defined Part to a Free Part

Rule 2 [Rocker]

SELECT ELEMENTS: Elements 2 & 3: LINES

Rule 3 [Rocker]

This Line radiates from the Pin-Joint [Element 1] and is in the kinematically-defined Part

This Line radiates from the Pin-Joint [Element 1] and is in the Free Part

Note:

To complete the command:

•	Left-Click the in the Command-Manager .

The Motion-Dimension FB icon is at the left of the graphic-area, and not a very convenient place.

or

The Motion-Dimension FB icon is near to your mouse-pointer - much more convenient.

RESULT: The Motion-Dimension FB and a Pin-Joint.

The Free-Part becomes a Rocker

The Rocker is kinematically-defined, with a Green Part-Outline

To edit the Motion-Dimension FB

1.	Double-click the Motion-Dimension FB

- or -

1.	Double-click the Motion-Dimension, or its arrowhead, but not the dimension value itself.

- or -

See How to Open a Dialog-Box

Video: Add Rocker

Tutorial 1: Step 1.5

Notes:

To move the Motion-Dimension Function-Block:

To move the Motion-Dimension:

PREPARATION

Before you can add the Motion-Dimension FB, you must have, at minimum of:

This example, the kinematically-defined Part is the Base-Part

and

Note:

The arrowhead shows the Positive direction of the Slide-Joint.

SELECT ELEMENTS: Element 1: SLIDE-JOINT

Rule 1 [Slider]

•	Element 1: A Slide-Joint joins a kinematically-defined Part to a Free Part

SELECT ELEMENTS: Elements 2&3: POINTS

After you select a Slide-Joint as Element 1, you must select Points as Elements 2&3.

Rule 2 [Slider]:

This Point is at one end of the Line in the kinematically-defined Part

Rule 3 [Slider]:

This Point is at one end of the Line in the Free Part.

RESULT: The Motion-Dimension FB applied to a Slide-Joint.

The Free-Part becomes a Slider

The Slider is kinematically-defined, with a Green Part-Outline

To edit the Motion-Dimension FB

1.	Double-click the Motion-Dimension FB

- or -

1.	Double-click the Motion-Dimension , or its arrowhead, but not the dimension value itself.

- or -

See How to Open a Dialog-Box

Notes:

To move the Motion-Dimension Function-Block:

To move the Motion-Dimension:

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:

The Motion-Dimension FB dialog-box opens.

o	Base-Value

- or -

o	Base-Value + Motion Value

It is best to think of the:

 Directions  separator, there are options to:

The image shows the elements in the graphic-area after Steps 1-10.

The 'top' Linear-Motion FB adds 30 to the MMA.

We have connected a wire from the Linear-Motion FB 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.

This means the input to the Motion-Dimension FB = 150º.

The Base-Value for the Motion-Dimension 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 red cursor is at the MMA.

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

The Graph shows a plot of the output of the 'Motion-Dimension FB against the 'bottom' Linear-Motion FB(0 to 359º)

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