Patent ID: 6988570

Claim:
A direction control device capable of controlling a direction of a control target including a plurality of driving means by individually controlling said driving means, comprising: a drive control means for controlling a drive of respective drive means; a target direction commanding means for commanding a target direction for a movement of said control target; and a drive characteristic difference setting means for setting a drive characteristic difference in work speed between the respective driving means such that the direction of said control target is controlled in said target direction: wherein said drive control means controls the drive of each of said driving means in accordance with said drive characteristic difference in work speed and comprises a control circuit adapted to control feedback to each of said driving means such that a drive characteristic difference detection result will become a set value as said drive characteristic and wherein said control circuit comprises a PLL control circuit which controls each of said driving means based on a phase difference of a reference signal frequency and a drive state detection signal frequency of said driving means and wherein said control circuit sets said phase difference initially based on said drive characteristic set.