Add 2D-Cam

See also: 2D-Cam dialog-box

What is a 2D-Cam?

In a machine, a 2D-cam is a planar shape that is attached to a machine component.

A Follower-Shape, held in a machine component is in continuous contact with the 2D-Cam. The motion and shape of the 2D-Cam specifies the motion of the Follower -Shape and machine component

2D-Cam : Related Elements

Action 1A

Add 2D-Cam

... optional ...


Action 1B

Edit Cam Display and Properties dialog-box

Action 2A                

Add Cam-Data FB

Action 2B

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

Action 3A

Do Cam-Analysis [with Graph FB]

Action 3B

Calculate Cam-Coordinates as Points or Arcs

*Force analysis only: Configure Power Source

Prepare 2D-Cam


You need these elements in the model:

1.A Part for the new 2D-Cam - the Cam-Part
2.A Profile as the Follower Shape on a different Part.

The two Parts must be kinematically-defined.

The two Parts must move relative to each other.

See Shape of the Cam-Follower.

Add 2D-Cam:

Add 2D-Cam icon

Machine Elements Toolbar : Add 2D-Cam

Menu :

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


Add 2D-Cam:

STEP 1: Click Machine-elements toolbar > 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 Roller-Shape



We must select the two elements.

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 Cam Display and Properties 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 Radius-of-Curvature only.

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


A 'Good' Cam


 A 'Bad' Cam


1.To show a scaled swatch of Pressure Angle, or Contact Force, or Maximum Shear Stress: see the Cam Display and Properties dialog-box
2.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 is correct.

See Also:

Cam Display and Properties dialog-box,

Cam-Data FB.

Cam-Coordinates dialog-box



How to...

Add a 2D-Cam


'Expand' then 'Play'

How to...

Add a 2D-Cam


Tutorial and Reference Help Files for MechDesigner and MotionDesigner 13.2 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd