| 摘要 |
An object of the present invention is to provide an electric screwdriver controller (14) having a function for determining that a correct tightening operation has been carried out when the tightening operation has taken a time longer than a reference time predetermined for the tightening operation, comprising a means for determining the reference time. The electric screwdriver controller (14) of the present invention comprises a torque monitoring means (40, S4) for monitoring whether or not a load torque in carrying out the tightening by using the electric screwdriver (12) has reached the tightening completion torque, a timer means (40, S1, S5) for measuring the time consumed from the starting of the tightening operation until the tightening torque has reached the tightening completion torque, as the tightening operation time, and a means (40, S6-S10) for determining the reference time for a subsequent tightening operation based on a plurality of tightening operation time obtained from the timer means in the tightening operations carried out for the predetermined number of screws. |
