PREPARATION IN THE Part-Editor

STEP 1: Edit the Base-Part

STEP 2: Add a sketch-loop to represent the Path of the Belt

STEP 3: Add a Line

The start-Point of the Line MUST be merged with the center-Point of the Arc.

STEP 4: Dimension each Arc

The exact radius of the Arc is not important.

STEP 5: Close the Part-Editor

PREPARATION IN Mechanism-Editor

STEP 6: Add a Motion-Path FB

Select the sketch-loop that represents the path of the belt.

The Motion-Point shows at the start-Point of the sketch-element you select.

STEP 7: Add one Part for each Arc

STEP 8: Add a Pin-Joint between a Point in each Part and the center-Point of an Arc.

STEP 9: Add a Motion-Dimension FB to the Part at the Arc you wish to be the Driving-Pulley.

There should be one Rocker that identifies the axis that will be the Driving-Pulley.

Not shown in the image: You can add a Linear-Motion FB to the Rocker.

There should be one Rotating-Part for each Pulley you will add.

The length of the Parts are not important.

Click Kinematic-elements toolbar > Add Pulley

You must use Add Pulley for each Pulley.

Select these four elements for each Pulley. Add a Pulley to the left Arc first.

Refer to the images above to identify the Elements.

1.Pulley Center Joint : Pin-Joint

2.Motion-Path FB

The Part-Editor opens with the Part associated with the Motion-Path FB and Motion-Point.

3.The Dimension of the Arc sketch-element

The Part-Editor closes

4.The Part joined with a Pin-Joint at the center of the Arc.

MechDesigner adds the Pulley.

Do Add Pulley again, to add a Pulley to the right-hand Arc and Part. This a Driven-Pulley.

1.Notes:

•A Driving-Pulley is given to the Pulley on the same axis as the Rocker.

•The Linear Speed of the Belt = Radius of Driving-Pulley *Angular Speed of Driving-Pulley

•The angular speed of the Rocker gives the linear speed to the belt.

•This then gives the angular speed to the other rotating-Parts, and the Driven-Pulley

PREPARATION IN Part-Editor

STEP 1: Edit the Base-Part

STEP 2: Add a different sketch-loop to represent the Path of the second Belt

You must merge the center-Point of the Arc for the second belt, with the center-Point of the Arc for the first Belt.

(Add the Arc first, then use Merge-Point tool in the Geometry toolbar).

STEP 3: You MUST add a dimension to each Arc

The radius of the Arc is not important. You can edit the number-of-teeth on Pulley later.

See Pulley dialog-box

STEP 4: Close the Part-Editor

PREPARATION IN Mechanism-Editor

STEP 5: Add a Motion-Path FB

Click a sketch-element in the sketch-loop that represents the path of the second belt

The Motion-Point shows at the start-Point of the sketch-element you click.

STEP 6: Add a Pulley

Make the selections for the Command-Manager:

a.Select the Pin-Joint at the center of the Part Pulley

b.Select the Motion-Path FB

c.Select the Radius dimension of the Arc (the Part-Editor opens to select the Radius of the Arc)

d.Select the Part

Click in the Command-Manager.

The Pulley shows in the graphic-area.

STEP 7: Add a different Pulley at the other end of the sketch-loop