CONTROLLER OF LINEAR TRACKING ARM

摘要

PURPOSE:To make the control of a preoffset angle unnecessary, by reading in and storing a preoffset error angle, and then comparing this stored angle with an error angle obtained in a performance mode. CONSTITUTION:An offset error angle sensor 9 contains a phototransistor Q1 including an emitter resistance R2 which is set opposite to a light emitting diode D1 to which a power supply VCC is applied via a resistance R1. A microporcessor 11 reads in and stores the data given from a voltage-time width converting circuit 10 and then delivers a digital signal in response to an arithmetic process. Then the processor 11 delivers the offset error angle information and its direction information based on the data given from the sensor 9. A low pass filter 12 is set at output terminals -O and -O1 of the processor 11 respectively. A driving circuit 13 applies the DC current given from the filter 12 to an arm driving motor 14.