Methods for Comparing Servo Grippers for Mini and Micro Assembly Applications

In the future the assembled parts become smaller and the precision demands increase in many cases. Grippers are one factor of the solution to make a competitive automation assembly system. Grippers have to be flexible and also capable of holding parts without dropping them during accelerations. Other demands for a gripper for mini and micro assembly applications are, among other things, accuracy and good force/size ratio. By using servo grippers also in high-precision applications for miniature-size parts, a noticeably amount of time will be saved. This paper presents two different kinds of developed two-fingered servo grippers with parallel moving mechanics, as well as the developed test systems for servo grippers and some test results.