Menu | Mechanism | Add 2D-Cam

<< Click to Display Table of Contents >>

Navigation:  MechDesigner Reference & User Interface > 2: Model-Editor, Mechanism-Editor, Part-Editor > Mechanism-Editor: > Machine elements >

Menu | Mechanism | Add 2D-Cam

Add 2D-Cam

See also: 2D-Cam dialog-box

What is a 2D-Cam?

A 2D-Cam is a planar shape that is made to be in continuous contact with a Follower. The shape and motion of the Cam defines the motion of the Follower. The Follower is most often a Cam-Follower Roller.

2D-Cam : Related Elements


Add 2D-Cam - You are here!

... optional ...



Edit 2D-Cam dialog-box

STEP 2A                  

Add Cam-Data FB


Edit Cam-Data FB to select a 2D-Cam


Do Cam-Analysis (with Graph FB)


Calculate Cam-Coordinates as Points or Arcs

*Force analysis - see Configure Power Source

Prepare 2D-Cam


You need two elements in the model:

1.A Part to which we add the 2D-Cam - the Cam-Part

2.A Profile, as the Cam-Follower Shape, on a different Part - typically a Cam-Roller

The two Parts must be kinematically-defined (Green) Parts

The two Parts should move relative to each other.

<<< An example preparation

See Shape of the Cam-Follower.

STEP 1A: Add 2D-Cam:

Add 2D-Cam icon

Machine-elements toolbar > Add 2D-Cam

Menu :

Add menu > Mechanism sub-menu > Add 2D-Cam


STEP 1: Click Add 2D-Cam

The Command-Manager indicates you must select two elements:

Select Part to carry the Cam - this becomes the Cam-Part.

Select Profile to be... - this becomes the Cam-Follower Profile - typically a Cam-Roller.



STEP 2: Click a Green Part-Outline - Cam-Part

STEP 3: Click a Profile - the Follower-Shape - in a different Part

STEP 4: Click OK-tiny-11-15 in the Command-Manager.



MechDesigner calculates the internal and external 2D-Cams and shows them in the graphic-area.

You can also display the Pitch-Curve

See 2D-Cam dialog-box



MechDesigner adds a Cam-plate as a child to a Part, and the 2D-Cam as a child to the Cam-plate. You can add many 2D-Cams to the same Cam-plate.

MechDesigner identifies the Cam as a 'Good' or a 'Bad' Cam - based on its Radius-of-Curvature only.

It is your responsibility to make sure the cam is suitable for your needs.


A Good Cam


 A Bad Cam


1.To show a swatch (Color Chart) of Pressure Angle, Contact Force, or Maximum Shear Stress: see the 2D-Cam dialog-box

2.Add a Cam-Data FB to calculate Cam-Coordinates, and to use its output-connectors to plot Pressure Angle, Contact-Force, and Contact Shear-Stress with Graph FB

3.If a 2D-Cam has an SSR or SSP Dyad in its kinematic-chain, you should use Show other Mechanism Sketches to make sure the Cam-Profile is correct.

See also:

2D-Cam dialog-box

Cam-Data FB

Cam-Coordinates dialog-box



'Expand' then 'Play'

How to...

Add a 2D-Cam