Fixed Pulley Centres - Belt Driven by Drive Pulley

In this example, the sketch-loop has two Arcs and two Lines.

STEP 3:

Add a Line and merge the start-Point with centre-point of the Arc.

It is easier to Add the Arc, then Hover+Drag the Line to merge it with the centre of the Arc.

STEP 4:

You MUST dimension each Arc

The exact radius of the Arc is not important. MechDesigner will add a Pulley with an integer number-of-teeth and pitch to give radius that is near to the dimension. You can edit the number-of-teeth and tooth pitch later, of course.

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 in the sketch-loop.

STEP 7:

Add one Part for each Arc

The length of the Parts is not important.

STEP 8:

Add a Pin-Joint between a Point in each Part and the centre-Point of an Arc.

Usually, use the origin of each Part for the Pin-Joint.

STEP 9:

Add a Motion-Dimension FB to the Part you wish to be the Driving Pulley.

This one way to give a Green rotating-Part that will be the Driving Pulley. In this case, it is a Rocker.

You must do Add Pulley for each Pulley.

Do

- or -

Add Pulley opens in the Command-Manager.

Click, in the graphic-area, the four elements from top to bottom.

See Preparation for each element

The Pin-Joint

The Motion-Path FB

The Part-Editor opens to show the sketch-loop to which you added the Motion-Path FB.

The Dimension of the Arc sketch-element with the Green rotating-Part (the left Arc)

The Part-Editor closes.

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

Click to complete the command.

MechDesigner adds a Driving-Pulley.

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

Notes:

A Driving-Pulley is driven by the kinematically-driven Part (the Rocker, in this case).

A Driven-Pulley is added to the free-Part