采用交流伺服驱动代替传统的机械式的凸轮传动机构，实现针辊电机与主电机的同步驱动。
The AC Servo-System drive is used instead of the traditional CAM driving mode to keep the synchronization of the pin-roller motor.
主回凸轮机构在泵送机构中应用广泛。
The main return cam mechanism has been widely applied in the pump transportation mechanism.
推导了空间凸轮和端齿的主曲率和主曲率半径的计算公式，给出了计算实例。
The calculating formulas on the main curvature and curvature radius of CAM and face tooth are deduced, and the calculating examples are presented.
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