About Joints

A Kinematic Joint specifies how two Parts can move relative to each.

The joints types in MechDesigner are Pin-Joint, Slide-Joint and Ball-Joint.

Objective of this Step

1.Add your first Joint
2.learn how to select two Points in different Parts to do the Pin-Joint.

Summary of this Step

1.Click Kinematic elements toolbar > Add Pin-Joint [left-side of the graphic-area]
2.Click a:
Point at the Origin of the new Part (Step 1.2)

and a

Point in the Base-Part (Step 1.3)


This help file uses the term 'Pin-Joint'.

Other terms you may know for a Pin-Joint are: Pivot-Point, Hinge-Point, Revolute Joint, Shaft Centre...

Video of this Step

How to...Add a Pin-Joint between two Points

Step-by-Step Instructions: Add a Pin-Joint

Add Pin-Joint icon

Expand the vertical Kinematic-elements toolbar to the LEFT-SIDE of the graphic-area.

STEP 1: Click Kinematic-elements toolbar > Add Pin-Joint
- or -
Click Add menu >  Mechanism sub-menu > Add Pin-Joint


In the image we can see the: active Pin-Joint command1s-red, and the cursor is 'Add Pin-Joint'2s.


STEP 2: Click the Point at the Origin of the Added-Part2s

It is best to click the Point at the Origin of the new Part when the Part is to rotate



STEP 3: Click a Point at one end of the Line in the Base-Part3s



You MUST click the two Points again, if you miss the second Point.


The Point in the Added-Part snaps to the Point in the Base-Part.

You may need to click the graphic-area to complete the command.

To cancel the Add Pin-Joint command, do one of the following:

Click Add Pin-Joint in the Geometry toolbar to the left-side of the graphic-area

- or -

Right-click in the graphic-area

Note: the contextual sensitive command menu appears at the same time when you right-click in the graphic-area.

- or -

Use the ESC key

-or -

Select a different command

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