抄録
In this study, mathematical models for the rotary table driven by roller gear cam and direct drive motor applied for 5-axis machining centers are proposed. The table driven by the roller gear cam is modeled as three degrees of freedom system. This model consists of rotary motion of motor, rotary motion of table and linear motion of globoidal cam. On the other hand, the table driven by the direct drive motor is modeled as single degree of freedom system. In order to evaluate the effectiveness of models, the frequency response, the step response and the pitch error of uniform velocity motion are measured and simulated. The influences of the unbalances mass are also measured.
