CORRECTION DATA STORAGE METHOD FOR ROBOT COORDINATE SYSTEM

PROBLEM TO BE SOLVED: To omit the combination management of a manipulator and a robot controller and to facilitate the handling by storing the correction data in an absolute value encoder of the manipulator to correct the mechanical displacement value. SOLUTION: When the coordinate system correction data are stored, a parallel/serial conversion circuit 102 of a robot control circuit 50 converts the correction data stored in a CPU and the rotational frequency data of mechanical zero degree into the serial data. Then an output signal level conversion circuit 103 converts the level of the serial data and sends these data to an absolute value encoder 54 contained in a manipulator 10 via a communication line 104. The encoder 54 converts the level of the received serial data via an input signal level conversion circuit 203. A serial/parallel conversion circuit 201 converts again the serial data into the parallel data and stores them into a corrected rotational frequency data memory 309. Thus it is not required to perform the management with the combination always taken into consideration in a failure mode, etc.