This study describes the dynamic response analysis of a magnetically levitated drilling machine under feedback control.
This machine is used for boring small holes in printed circuit boards with highly accurate positioning and sizing, and is operated under feedback control as follows. The exciting currents are increased or decreased according to information (the displacement and velocity of the levitated table), provided by gap sensors.
To obtain the optimum conditions for feedback control, dynamic analysis is carried out by using the finite element method combined with the equation of motion and the control equation. As a result, the effect of the control constant on the recovery time of the levitated table is defined.
