Add Gear-Pair and Gear-Pair elements

Note: Theme and Style, and Colours

Edit menu > Application-Settings > General tab > Theme Options > Active Theme: Charcoal Dark Slate,

Edit menu > Application-Settings > Graphics tab > Display Colours :  [Background : White] ;  [Part-Unsolved : Blue] ; [Part-Solved: Green] ;[ Joint-Solved : Green] ; [Joint-Unsolved : Blue]


before 'Add Gear-Pair'

Three [3] Parts1s-red2s3s:
otwo kinematically-defined Parts [Green Part-Outlines], and
oone Part that is not kinematically-defined [Blue Part-Outline].
Three Lines4s5s6s: a Line in each Part1s-red2s3s
Two Pin-Joints7s8s: a Pin-Joint at the each end of the 'middle' Line5s to join the Points at its start-Point and end-Point to Points at the ends the other two Lines4s6s
One dimension: the 'middle' Line5s must have a dimension to specify its length. Use the Part-Editor to add a dimension to specify its length.


Line5s and the Part2s may move, or be stationary [fixed], relative to the Base-Part.

Each Line can also be a CAD-Line

COMMAND-MANAGER - before you select the elements

COMMAND-MANAGER - before you select the elements


COMMAND-MANAGER - after you select the elements.

COMMAND-MANAGER - after you select the elements.


After 'Add Gear Pair'

Part3s becomes a kinematically-defined Part [ its Part-Outline changes from Blue to Green]

The name of the new element in the Kinematics-Tree is a Geared-Rocker.

Part1s-red and Part3s move wit the two gears [Gear-Pair]
The Pin-Joints7s8s are the centres-of-rotation of the two gears
The Line5s between the two Pin-Joints becomes the derived-name 'Line-of-Centres'.

Geared-Rocker elements in the Kinematics-Tree


See Kinematics-Tree

The kinematic-chain for the gear arrangements as defined above, is:

1s-red Kinematically-defined Part

This Part is any rotating-Part that is a 'kinematically-defined Part'.

In this case, the kinematically-defined Part is a Rocker

2s Geared-Rocker

The kinematic elements for a Geared-Rocker are a:


and a

Gear-Pair element

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