Caliper assembly for a grinding machine

摘要

Disclosed is a caliper assembly for measuring a diameter of a roll received on a roll support of a grinding machine which includes a frame positionable adjacent the roll support and a linear guide connected to the frame. A pair of measuring arms is connected in spaced relation to the linear guide. The linear guide is configured to enable each measuring arm to move relative to the frame and parallel to the longitudinal axis of the linear guide. A linear motor is connected between the frame and the pair of measuring arms. The linear motor is configured to supply to the pair of measuring arms a motive force which causes the pair of measuring arms to move together or apart. If one of the measuring arms contacts a workpiece with a force in excess of a predetermined force, the linear motor terminates supplying motive force thereto.