This is a great illustration! Thank you so much for the video. I feel it's important to note that motion in the positive x, positive y and positive z translational directions is not restricted by the 6 pins. The 3-2-1 principle restricts a total of 9 out of 12 degrees of freedom. That being said, we cannot add more pins as machining the workpiece would become hard. The remaining 3 degrees of freedom are restricted by clamps. I hope this helps
I am currently learning CMM programming via on-the-job training. I couldn't fully understand the 3, 2, 1 alignment principal until I watched this video. This video helped tremendously! Thanks!
WoW, what a nice demonstration, may you kindly state difference between locate, support and clam, Bcoz I m confused in locate and support??? Clamp is clear in my mind
Thats a good question! In order to answer this question, you will have to consider a total of 12 degrees of freedom, basically splittng the translational motion about positive and negative axis and Rotational into clock wise / Counter clock wise. This way the 3-2-1 principle will allow you to locate and support your work piece by arresting 9 DOF's. The remaining 3 translational movements are to be essentially arrested with a use of a Clamp. You might want to have look into design of jigs and Fixtures for understanding this concept.
