Abstract
In this paper, we developed a tool holder with torque sensing function in it by using a magnet coupling with magnetoresistance sensors. Cutting torque twists a tool holder against a tool chuck through a magnet coupling. We can estimate torque by estimating amount of twist. Unfortunately errors in machining and assembly of a tool holder degrade an accuracy of torque measurement. We estimated an effect of manufacturing on a measurement error and developed a technique to compensate manufacturing errors. We checked its accuracy by comparing its output signal with a torque sensor provided by Kistler. Finally we confirmed that the developed tool holder with sensing function showed almost same accuracy as a torque sensor provided by Kistler.
