If aspects concerning the sliding between tool flank and workpiece or the deformation/fracture along the shear plane are to be studied, the workpiece is the best sensor location
If information concerning the sliding between tool flank and workpiece or between chip and rake face is required, the tool is the best sensor location
The tool will be used as sensor location also if the chip fracture phenomenon is to be analysed
When the sensor is placed on the workpiece, the main problem that can occur is the onset of cracks or defects that can intercept the AE signal before it correctly reaches the workpiece surface, loosing part of the information
This could be solved by using other types of sensors simultaneously as, for example, a sound analyser utilizing air as signal transmission medium