Calibration system and calibration method of robot

A calibration system of a robot, comprising:

• a processor;
• and
• a memory that stores a plurality of parameters in which mechanical errors are described, the plurality of parameters being candidates of mechanical error parameters to be used for the robot,
• wherein the processor is configured to:
• perform selection of a set of parameters among the plurality of parameters;
• perform identification of the selected set of parameters by using the selected set of parameters and a plurality of pieces of data, each of which associates an actual measured position of a tip position of the robot with information indicating a state of the robot upon measurement of the actual measured position;
• perform determination of whether or not a result of performing identification satisfies a predetermined criterion;
• in response to determining that the result does not satisfy the predetermined criterion, repeat performing selection, identification, and determination until the result satisfies the predetermined criterion;
• and
• in response to determining that the result satisfies the predetermined criterion, output the selected set of parameters to a controller that controls the robot.