Following conditions are essential in order to make smooth power transmission efficiently using Miyoshi universal joint.
（1）Use a dual joint or two joints in principle
（2）Give special attention to phase matching in two-joint application
Use the same joint angle for both input(a1)and output angle(a2).
The shafts Ⅰ,Ⅱ,and Ⅲ should be on the same plane.