Abstract
A new positioning system has been developed to realize both the fine motion and the coarse motion independently and/or simultaneously to realize the reduction of the positioning time and the improvement of the positioning accuracy. The main characteristic of the developed mechanism that consists of a stepping motor, a hollow stepping motor, a reducer and mechanical parts is simple setup and no stroke limitation in the fine motion. The coarse motion is realized by controlling the rotation of the hollow stepping motor. The fine motion is realized by controlling the stepping motor. The hybrid motion of the fine–coarse motion is realized by controlling the rotation of both the hollow stepping motor and the stepping motor. The basic performances were evaluated by adopting the open loop positioning system. The developed positioning system demonstrates the effect of hybrid positioning and the practical utility.
