METHOD FOR DIAGNOSING ABNORMALITY OF EJECTOR ASSEMBLY

摘要

PROBLEM TO BE SOLVED: To easily narrow the abnormal place of an ejector assembly down and to diagnose both of abnormality due to too much load and abnormality due to too little load to perceive trouble beforehand. SOLUTION: Trial operation is performed to set the upper and lower limit values of the load torque of a servo motor. At the time of automatic operation, the load torque of the servo motor is detected and the detected value is set as history and renewed by the set number of times to be recorded. When the detected value of load torque is not more than the lower limit value, load is diagnosed to be abnormally lowered in a moving mechanism and a part becoming the candidate of a too little load factor is displayed along with history data. When the detected value of load torque is not less than the upper limit value, load is diagnosed to be abnormally increased in the moving mechanism and a part becoming the candidate of a too much load factor is displayed along with history data.