Abstract
A monitoring system is proposed in order to detect the condition changes at abrasive/workpiece interface in abrasive cutoff operation. The system can detect the condition changes from the electric power input change at the driving motor of lapping tool. The electric power input is strongly related with the abrasive effectiveness. In the lapping of SUS304, the abrasive effectiveness hardly reduced and then the electric power input keeps an almost constant value over the lapping. The lapping of A5052 induced a progressive removal of abrasive grains from their retaining resin and then the electric power input decreased gradually as increasing the lapping time. The adhesion of chips onto the cutting edges, like the case of Inconel 713, leads to losing the nominal function of cutting edges and the electric power input was thus descended suddenly.
