<< Click to Display Table of Contents >> Navigation: MechDesigner Reference & User Interface > 2.2 Mechanism-Editor > Mechanisms > Machine elements > Add Pulley |
See also : Pulley dialog
Term : |
Definition |
---|---|
Pulley : |
When you do Add Pulley, we add for you the outline of a Pulley, with teeth, to a rotating-Part - see also Types of Pulley The rotating-Part of a Pulley must rotate about the center-Point of an Arc that is on the sketch-path of a Belt. |
Belt : |
A sketch-path to represent the path of the Belt. The motion of a Motion-Point along the sketch-path represents the motion of the Belt. |
We relate the angular motion of each Pulley to the linear motion of the Motion-Point on a Belt by the radius of each Pulley. To control the radius of each Pulley, you can control its number-of-teeth and the Tooth-Pitch of the Belt. |
You can do Add Pulley to a rotating-Part that is kinematically-defined (Type 1) or is not kinematically-defined (Type 2). |
|
Type 1: A Driving-Pulley : |
Before you do Add Pulley, the rotating-Part is kinematically-defined. After you do Add Pulley, we control the linear motion of a Belt from the angular motion of the rotating-Part (Driving-Pulley). Add a maximum of one Driving-Pulley to a Belt. |
Type 2: A Driven-Pulley : |
Before you do Add Pulley, the rotating-Part is not kinematically-defined. After you do Add Pulley, we control the angular motion of a rotating-Part (Driven-Pulley) from the linear motion of the Belt. |
![]() |
Driven-Pulley
|
|
Driving-Pulley
|
![]() Sketch-loop as the path of the Belt. |
STEP 1: Add a sketch-path to represent the path of the Belt. The sketch-path should include only Lines and Arcs. Usually, add Tangent constraints between each Line and Arc. Do not add equal constraints to the Arcs. The sketch-path is usually a closed sketch-loop. It is usually helpful to fully define the geometry of the sketch-path.
If the rotating-Part is a Rocker for a Driving-Pulley - see STEP 3A:
Why? You need the Line to add a Motion-Dimension FB to the rotating-Part. |
||
![]() A Line for a Motion-Dimension FB |
![]() |
STEP 2: Add a MOTION-PATH FB Add ONE Motion-Path FB to the sketch-path.
The Motion-Path FB is in the graphics-area. And, a Motion-Point is at the start-Point of the sketch-element you click. |
A Pulley is a Driving-Pulley or Driven-Pulley. It is a rotating-part.
![]() rotating-Part for a Driving-Pulley |
STEP 3A: Type 1 - Driving-Pulley A Driving-Pulley is a rotating-Part that is kinematically-defined before you do Add Pulley. Add a maximum of ONE Driving-Pulley to a Belt.
|
|
![]() rotating-Part for a Driven-Pulley |
STEP 3b: Type 1 - Driven-Pulley A Driven-Pulley is a rotating-Part that is not kinematically-defined before you do Add Pulley. The motion of the Belt and the Pulley's Pitch-Circle Diameter of the control the motion of a Driven-Pulley.
|
![]() |
STEP 1: Click Add Pulley
There are four elements to select in the Command-Manager STEP 2: Click the four elements
* If the rotating-Part is : •is kinematically-defined - the motion of the Pulley moves the Belt (Driving-Pulley). •is not kinematically-defined - the motion of the Belt moves the Pulley (Driven-Pulley). STEP 3: Complete the Command
Result:
|
|||||
![]() 1 x Driving-Pulley (Purple) Do Add Pulley to add 1 x Pulley. The image shows two Pulleys after you do Add Pulley two times. |
Video: Add Pulley (and the Belt-Path)