Its solution is quite involved and requires iteration. Blechschmidt and Vicker's ap proach [21]chose coordinates for 10 points on the desired curve. Ananthasuresh used 15 points with some trial and error required in their selection. The advantage of these cou- pler curve equation approaches is that they define the entire curve which can be plotted and examined for suitability and defects prior to calculating the link dimensions which requires significant additional computing time.