Cam Display and Elements dialog-box

To open a Cam Display and Properties dialog box:

1.Click a 2D-Cam in the graphic-area or Assembly-Tree

In the Selection-Window:

2.Right-click the 2D-Cam
3.Click Edit element in the contextual-menu

2D-Cam : Related Elements and Actions

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]

Use Cam Data FB Output-Connectors of Cam-Data FB:

Entrainment Velocity

Action 3B

Calculate Cam-Coordinates as Points or Arcs

Save as:

Transfer directly to SOLIDWORKS

*Force analysis only: Configure Power Source

Cam Display and Properties dialog-box


Cam Display tab

tog_minus Cam Visibilities 



Cam 1
Pitch-Curve. [a dashed line]

and , or

Cam 2


You must display a minimum of one.
Look in the graphic-area to see which is which cam.

tog_minus Cam Display Options 


Display Cam Contour as:

Cam-Profile [default]
Maximum Contact Shear-Stress**
Contact Force**
Pressure Angle

See also: Cam-Data FB

** The Power Source must be configured correctly.

1.Configure the Power Source:  to make the 2D-Cam as the Power Source for the kinematic-chain in which the Cam-Follower is a Part.
2.The Elastic Modulus and Poisson's Ratio must both be correct for the Cam and the Cam-Follower. See Material Properties

Line Thickness of Cam: [default =1]

Increase the thickness of the cam profile.

Increase the Line Thickness for Cam Display that is not 'Cam Profile'.

Show Instant Centres : For the kinemagicians

Cam Profile Colour : If you have more than one cam in the model, then it is helpful to have a different colour for each Cam.

Example Cam Display Option:

Cams in Graphic Area as 'Cams Only'


Cam Profile


1s-red Cam 1 and 2 are continuous lines.

2s Pitch-Curve is a dashed line.

Cams in Graphic Area as 'Maximum Contact Shear Stress'

Maximum Shear-Stress

Each point around the cam has a unique Maximum Shear-Stress.

See image:

1s-red The value of the Maximum Shear Stress at the contact point

2s The colour of the cam profile agrees with the colour-bar3s.

3s The colour-bar is a scale of the Maximum Shear-Stress.

Cams in Graphic Area as 'Cams Contact Force'

Contact Force

Refer to the image:

1s-red The value of the Contact Force is at the contact point.

2s  The colour of the cam profile agrees with the colour-bar3s

3s The colour-bar is a scale of the Contact Force

Cams in Graphic Area as 'Cams Pressure Angle

Pressure Angle

1s-red The value of the Pressure Angle is adjacent to the contact point between the Cam-Follower and Cam

2s The colour of the Cam agrees with the colour-bar3s

3s A colour-bar is a scale of the Pressure Angle

See Also Pressure Angle

Cam Parameters tab

tog_minus Material-Properties


To calculate the Maximum Contact Shear-Stress enter:

Cam and Cam-Follower's Poisson's Ratio
Cam and Cam-Follower's Elastic Modulus

Elastic Modulus is also its Young's Modulus.


See: [internet link] for material properties.

tog_minus Cam Range and Radius...


Check-box: Rise - Return

Continuous Profile
Open Profile

See below for more details

Radius of Curvature Warning [%] if (Radius-of-Cam-Curvature / Radius of Cam-Follower ) × 100%.

The Cam profile in the graphic-area becomes RED if its Radius-of-Curvature becomes too small as compared to the Radius of the Cam Follower.

There is a danger of Cam-Undercutting.

See Also Application Settings

Cam Range Start & Cam Range:

Calculate the cam over a reduced range. Usually less than 360.

For example:

If the cam rotates exactly 2× in one machine cycle, then enter Cam Range Start: 0 ; Cam Range : 180
If the cam is a 'slot-cam', the cam-follower moves along the cam in two directions. Then, enter a value in the Cam-Range box to calculate the cam only as the cam-follower moves in one direction.

This is not always possible, as the cam-follower may have a complex motion in the right and left directions, even at points that are not at the two ends of the cam.


Examples of Open / Closed Cam and Cam Range

For example: a reciprocating 'Slot-Cam' that moves to the right and left - see image.

You want to show the top of the Slot-Cam. The Cam-Follower is at the left at 0, and is at the right-at 120.

Cam-Range Start: 0 ;

Cam Range: 120


Rise Only: clear check-box;

The cam does not have a 'fly-back' line.

Rise-Return: select check box;

The cam does have a 'fly-back' line.

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