This design arrangement is a little more unusual than the Belt driven by a Pulley.
Physically, the Belt is wrapped around freely rotating Pulleys. The Belt is driven by motion-values at the input-connector to the Motion-Path FB.
Preparation:
Hover+Drag to merge the Points at the end of each Line and Arc to give a sketch-loop.
The radius of the Arc is not important. MechDesigner adds a Pulley with an integer number-of-teeth with a Pulley that has a radius that is near to the starting dimension.
|
|||||||||
The Command-Manager has one selection-box: Click a sketch-element in the sketch-loop. Click |
|||||||||
A Motion-Point
Connect the Linear-Motion FB to the Motion-Path FB Motion-values of 0 - 360 (at the output of the Linear-Motion FB) move the Motion-Point the total length of the sketch-loop. You can use motion-values from any Function-Block,of course. E.g.: Motion FB . |
|||||||||
The length of each Part is not important for the Pulley or belt.
The Pin-Joint will be at the centre of the Pulley. |
Do Kinematic-elements > Add Pulley to add each Pulley. Click Add Pulley in the:
- or -
Add Pulley opens in the Command-Manager. Select the four element in the graphic-area. Note: See Preparation, above, to identify the four elements.
|
|||||||||||
The Part-Editor opens to show the sketch-loop
The Part-Editor closes.
Click Do Add Pulley again, to add a Pulley at the other Arc. |
|||||||||||
![]() Two Pulleys Driven by the Belt' |
Notes: The Pulleys are Driven Pulleys. The angular-velocity of each Pulley is defined by the linear-speed of the Motion-Point along the sketch-loop (Belt) and the radius of each Pulley.
|
||||||||||
Kinematics Tree of the Pulley-Rocker element. |