Linear Motion Ball Guide is widely used over various industrial machines commencing with machine tool, which becomes now an essential necessity as machine component. In the field where required high precision, however, a peculiar phenomenon in Linear Motion Ball Guide called “Waving” has been questioned and which kept some clients at a distance from using Linear Motion Ball Guide. It is known that the generating factor of Waving and Ball Circulation are linked closely, so I decided to apply the load distribution theory to each and every position of moving balls of Linear Motion Ball Guide to ascertain the condition of load distribution and posture displacement.What I found is that the crowning of raceway is intimately related to Waving, and that there is a configuration in crowning which minimize Waving. By applying this technology to the condition of clients using Linear Motion Ball Guide, and I developed the Linear Motion Ball Guide which can be used without problem even in the field of high precision.

This paper describes a case study of a teaching method through a catchphrase named “Catchphrase-based learning” (also referred to as “Catchcopy (Slogan)-based learning” or “One-phrase-based learning”) to improve the quality of engineering education even through a traditional lecture (teacher)-based approach to teaching specialized knowledge in a large lecture class. This instructional design mainly consists of three steps as follows: (1) Students must submit a catchphrase that best describes the features of a given technical term generally until the end of each class on our university's online education system. (2) Students must select appropriate catchphrases (at least five but no more than ten) and vote them through the online education system after each class. (3) In the beginning of the next class, catchphrase awards (approximately top 7 of works) together with teacher-selected special awards (approximately 2‒3 excellent works) will be given out and reviewed. The effects of this teaching method on learning effectiveness will be discussed on the basis of a class evaluation questionnaire.