What is a Polyline?

In MechDesigner, a Polyline is a sketch-element.

A Polyline is a copy of the shape of a 2D-Cam or Gear in a Gear-Pair as a sketch-element.

If the Cam or Gear-Pair is open when you add the Polyline, then the Polyline is also open. Use the Part-Editor to add sketch-elements to close, if you want it to be a sketch-loop..

Why add a Polyline

You can select the Polyline with Add Profile or Add Hole to create a Solid [or cut] that is a copy of the 2D-Cam or Gears [if the Polyline is closed]

Add Polyline' & 'Update Polyline'



Solids toolbar: above graphic-area.


Add menu > Mechanism sub-menu > Solids sub-menu > Add Polyline

Add Polyline

1.Click the Home key on your keyboard to move the Master Machine Angle to zero degrees.
2.Click Solids Toolbar > Add Polyline

The Command-Manager starts. There is one selection-box

3.Click a 2D-Cam or Gear-Pair in the graphic-area or Assembly-Tree.

The 2D-Cam or the Gear-Pair shows in the selection-box of the Command-Manager.

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

Update Polyline

Do Add Polyline again if you edit the shape of the 2D-Cam or edit a parameter of the Gear-Pair with the Gear-Pair dialog-box.


If you delete a Polyline, you also delete the 2D-Cam.

You must add the 2D-Cam again.

See Also:

Add 2D-Cam; Add Gear-Pair,

Add Profile, Add Hole

tog_minus        Detailed: How to use Add Polyline

Use Add Polyline to:

Add a Polyline, and
Update an existing Polyline

Each 2D-Cam and Gear-Pair can have only one Polyline.

You can use a Polyline to add many Profiles.


STEP 1: Click Run menu > Home
STEP 2: Click Solids Toolbar > Add Polyline in the
- or -
Mechanism menu > Add Polyline

CM-Make Cam Profile

The Command-Manager instruction:

In the graphic-area or Assembly-Tree: select a 2D-Cam or Gear-Pair to make a Polyline  sketch-element. The Polyline is a  sketch-element that can be used to Add a Profile Element.

The short hint over the box: 'Select a 2D-Cam / Gear-Pair to convert'.


STEP 2: Click a 2D-Cam or Gear-Pair in the graphic-area


You MUST click the 2D-Cam or Gears. to ADD or UPDATE a Polyline

CM-Make Cam Profile-after

STEP 3: Click OK in the Command-Manager

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