Method of teaching an operation program to a line robot wherein a master robot positioned at a location remote from said line robot is first taught the program

Claim 1

An off-line teaching method for industrial robots including at least a line robot placed in an operating line for processing a line work arranged therein, said method comprising the steps of: preparing, in addition to the line robot and the line work, a master disposed in a location remote from the operating line and a model work similar to the line work positioned adjacent said master robot; selecting a first four reference points on said model work and a second corresponding four reference points on said line work, said first and second four reference points being located in different planes; teaching said master robot said first four reference points at said location remote from the operating line; teaching said line robot said second four reference points in the same order as said teaching of the first four reference points to the master robot; obtaining a transformation matrix from the first four reference points taught to said master robot and the second four reference points taught to said line robot, said transformation matrix being obtained by solving a system of twelve linear equation with twelve unknowns, said linear equations being established by the first four reference points taught to said master robot and the second four reference points taught to said line robot; teaching said master robot an operation program by using said model work in said location remote from said operating line; and transforming the operation program taught to said master robot into an operation program for said line robot by using said transformation matrix to thereby teach the operation program to said line robot.