Abstract
In this work, a position control model with a biasing mechanism is produced. The produced model is controlled by resistance feedback without setting off-time and can be set and retained at an arbitrary position. The effects of control distance and bias load on positioning characteristics such as settling velocities at rise and fall and deviation of position are investigated. The results show that the settling velocities increase with increasing control distance and are little influenced by bias loads because the heating rate by electric current in the rising process becomes large according to the increase of control distance and the cooling rate by natural convection becomes large in the falling process. Furthermore, the deviation of position does not almost depend on the control distance. The deviation of initial position is within the range of 5-10μm and is almost constant against the bias loads. The deviation of desired position is within the range of l0-20μm and increases slightly with increasing bias loads.
