CONTROL CIRCUIT FOR CENTRIFUGE

PURPOSE:To miniaturize a hardware and to improve reliability and suitability for maintenance by permitting control of zonal operation to be performed by a software using a microcomputer and providing a function for keeping a zonal revolution per min and a function for varying the zonal revolution per min. CONSTITUTION:A CPU6 outputs a signal for accelerating the revolution per min of a zonal rotor 17 the rpm set by an rpm setting device 15 and for keeping the set rpm when a starting switch 11 is turned ON during a zonal switch 13 is ON, and outputs a signal for accelerating the rpm of the rotor 17 to a higher rpm set newly in the setting device 15 when the switch 11 is turned ON and outputs simultaneously a signal for turning a solenoid 5 for door-locking ON when the rpm of the rotor 17 reaches a proper value. Moreover, CPU6 outputs a signal for decelerating the rpm of the rotor 17 to an rpm initially set in the setting device 15 when a stop switch 12 is turned ON during a high speed operation of the rotor 17, and outputs simultaneously a signal for turning a solenoid 15 ON when the rotor 17 is decelerated to a proper rpm.