SCREW FASTENING FAULT ASSESSMENT DEVICE, SCREW FASTENING DEVICE, SCREW FASTENING FAULT ASSESSMENT METHOD, AND CONTROL PROGRAM

摘要

The present invention provides technology with which it is possible to highly accurately assess the quality of fastening of a screw. The present invention comprises a position acquisition unit (13) that acquires the axial-direction position of a driver (50), and a fault assessment unit (14) that assesses that a fault has occurred in fastening of a screw when the amount of change in the axial-direction position of the driver (50) from when temporary seating occurred is greater than a threshold value.