In this case we are dealing with linkages so the parts or elements are links and joints. Determine the significant dimensions and starting position of the mechanism given a specified task.
Inversion implies a reverse in order.
Applied to linkage synthesis, inversion is simply choosing one link as ground, or fixed, and observing the motion of other links relative to the fixed link. Center point construction . The center-point of a circle defined by three points can be constructed in two steps. Find the center point as the intersection of the perpendicular bisectors of these two lines. Because the circle is completely defined by three points, we will synthesize linkages graphically with three precision positions.