Step 6A.7: Add Polyline and Profile to 2D-Cam

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Step 6A.7: Add Polyline and Profile to 2D-Cam

Summary of the Step.

Note: You do not need to do this step to get Cam-Coordinates.

Add a Polyline and a Profile to the Cam-Track of Cam 1 and show it as a Solid.

A Polyline is a sketch-element that is a copy of the 2D-Cam.

If the 2D-Cam changes its shape, you must update the Polyline.

Why add a Polyline and Profile to a Cam?

Only if you want to:

•Show the Cam as a Solid to check for collisions.

•Find its Mass Properties: Mass, center-of-Mass, and Moment-of-Inertia. e.g. if you want to balance the Cam.

•Include the Mass of the Cam with a Force Analysis.

Summary of this Step:

Do these commands.

1.Add Polyline to the Cam-1

2.Add Profile to the Polyline

tog_minusVideo of this Step

 

'Expand' then 'Play'

 
tog_minusAdd a Polyline

STEP 1: Add a Polyline to Cam 1

1.Click Run toolbar > Home (or ALT+H key combination)

It is important that the MMA=0

GST-6A7-CM-AddPolyline-0

GST-Icon-AddPolyline

2.Click Solids toolbar > Add PolylineRed-14-1b

Note: You can add a Polyline to a 2D-Cam or a Gear-Pair.

GST-6A7-GA-6A7-001

3.Mechanism-Editor: Click the 2D-CamRed-14-1b (Cam-1) in the graphic-area

GST-6A7-CM-AddPolyline-1

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

tog_minusAdd a Profile to the Polyline

GST-Icon-AddProfile

STEP 1: Add a Profile to the Polyline

1.Click Add menu > Mechanism sub-menu > Solids sub-menu > Add Profile

or

1.Click Solids toolbar > Add Profile

2.Mechanism-Editor: Click the 2D-Cam in the graphic-area

GST-6A7-CM-AddProfile-Polyline-1

In the Command-Manager, you should see the Polyline in the selection-box.

3.Click OK-tiny-13-17 in the Command-Manager

To see the Profile and Extrusion

4.Use Visibility toolbar > Show Solids in Mechanism

Assembly-Tree with 2D-Cam, with Profile/Extrusion element.

Assembly-Tree with 2D-Cam, with Profile/Extrusion element.

The elements in the Assembly-Tree.

Expand the Cam-Shaft Part to see these elements:

Part - the Cam-Shaft

•CAD-Line - from the start-Point to the end-Point of the Cam-Shaft Part

•Cam-Plate - we do not add this element. We use it as a holding element for all 2D-Cams you may add to the Cam-Shaft Part.

•2D-Cam - a OK-tiny-13-17 to indicate it is a good cam (in this case)

•Profile  - a child to the Part

•Extrusion - a child to the Profile

MechDesigner does not list the Polyline in the Assembly-Tree. If you click the 2D-Cam in the graphic-area, you will see the Polyline elements in the Selection-Window.