Menu | Mechanism | Add 3D-Cam

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Menu | Mechanism | Add 3D-Cam

Add 3D-Cam

See also 3D-Cam dialog-box


What is a 3D-Cam?

A 3D-Cam has complex surfaces with Cam-Flanks that interact with Cam-Followers Rollers.

Barrel, Cylindrical and Globoidal Cams are 3D-Cams. Globoidal Cams are also known as Roller-Gear-Drives and Ferguson Cams.


Prepare 3D-Cam

You must add 5 elements in:

3 Mechanism-Editors for a Barrel Cam

4 Mechanism-Editors for a Globoidal Cam.

All Parts are kinematically defined before you do Add 3D-Cam.

We recommend you do these tutorials if you have not used this command before : Globe-wwwTutorial 6C: Barrel and Globoidal Cams


Top-Tip: Rename the three or four Mechanism-Editors to the names of the elements you need to select to Add 3D-Cam.

See Rename dialog-box


GA-3DCam-Mechanism-Nametabs

Prepare the view:

Active Mechanism-EditorRed-14-1b  - click the Mechanism name-tab with the Part to which you will add the 3D-Cam

Visibility toolbar > Show other Kinematic and Sketch-Elements - you need to see elements in the other Mechanism-Editors

Show background sketch light-bulbRed-14-2 - right-click each Mechanism name-tab and select 'show .... '.

View toolbar > Spin - you need to see all 5-elements before you can do Add 3D-Cam

Filters menu : Display Planes  - hide Planes as they often hide the elements you need to do Add 3D-Cam

GA-Add3DCam-Prep-0

Prepare the five element:

Red-14-1 Part : Follower-Part in Mechanism-B

Red-14-2 Profile : Follower-Roller in Mechanism-B | the Profile must be circular.

Red-14-3 Part : Cam-Part in Mechanism-A - this must be the active Mechanism-Editor

Red-14-4 Profile : Cam-Blank in Mechanism-C

Red-14-5 Line : Line in Mechanism-C

Add 3D Cam

Icon-Add3DCam

STEP 1: Click Machine-Elements toolbar > Add 3D-Cam  

CM-Add3DCam-2

STEP 2: Click the five elements, from top-to-bottom, in the graphic-area or the Assembly-Tree.

GA-Add3DCam-Prep-0

Elements to add a 3D-Cam:

Red-14-1b Part: Cam-Follower Part: Click the Grey Part-Outline

Red-14-2 Profile: Cam-Follower Roller: Click the Grey Profile (contour)

Red-14-3 Part: Cam-Part: Click the Green Part-Outline in the active Mechanism-Editor

Red-14-4 Profile: Cam-Blank Profile: Click the Grey Profile (contour)

Red-14-5 Lines Line that is the axis-of-rotation of the Cam-Blank: Click the Grey sketch-line

 

STEP 3: Click OK-tiny-13-17 in the Command-Manager

GA-3DCam-Example

Result:

MechDesigner adds the 3D-Cam as a tube - see left.

The 3D-Cam has four surfaces, which enclose the volume you will cut from a Cam-Blank

Four Surfaces

Cam Flank Surface x 2 - the active flanks of the roller, one each side of the Follower-Roller

Floor Surface - a surface between the bottom edges of the Cam-Flank Surfaces

Top Surface - a surface between the top edges of the Cam-Flank Surfaces. This surface is normally outside of the Cam-Blank.

Use the 3D-Cam dialog-box to edit the number of rims and the number-of-points, to specify the density of the mesh and 3D-Cam Surfaces.

Video:

 

'Expand' then 'Play'

How to...

Add a 2D-Cam