Here is something new. Our Mathematica notebook can find defect-free spherical four-bar linkages that guide a body through five orientations in a tolerance zone near a specified set of task orientations.
Lecture notes on specific topics.
This is a draft of my editorial on 21st Century Kinematics for the Journal of Mechanisms and Robotics. It is a follow-up to my previous editorial on Kinematics, Polynomials and Computers. I would welcome your feedback.
Select this link to the .pdf of Kinematics, Polynomials, and Computers–A Brief History, which is a summary of the history of the kinematics of mechanisms and robotics with a focus on the challenge of solving the polynomial equations that arise in their study. It is a draft of my February 2011 editorial for the ASME Journal of Mechanisms and Robotics.
***Update*** This version has a correction to references  and .
Select this link to download our Mathematica notebook for four-bar linkage synthesis. It will download as a textfile, so delete the .txt extension, then Mathematica should be able to read it. If you have an problems, please contact me.
This notebook is an example of the type of programs that I use to teach mechanism theory. In my courses students generate their own notebooks like this for the analysis and synthesis of various linkages. The program is not optimized in any way.
This particular notebook does provide a new capability. It uses a randomized search in tolerance zones near the required task positions to find linkages that do not have well-known defects. Cut and paste the text file output into our Mechanism Generator software to automatically generate a SolidWorks model of the linkage and task.
This video shows the operation of a cam-driven toy artist.
I found it on Dug North’s Automata/Automaton blog, http://dugnorth.com/blog/
My class notes on cam-follower systems can be downloaded at the link: http://synthetica.eng.uci.edu/mechanicaldesign101/McCarthyNotes-Cams2.pdf
Prof. A. J. Klein Breteler maintains an array of mechanism models at TU-Delft. Access videos of these models at the site: Linkage Models
The basic properties of robots can developed by studying planar serial chains. Select this link for my notes on elementary robotics:
Yi Zhang, Susan Finger and Stephannie Behrens have prepared an on-line introduction to mechanisms consisting of eight chapters and almost 100 figures. Access it at the link:
The slider-crank is an important mechanism with a wide range of applications. Here are my notes on its kinematic analysis.
The four-bar linkage is a basic machine component. It comes in two primary forms the 4R quadridlateral and the slider-crank. Here are my notes for the analysis of the 4R quadrilateral.