Machine control gage system

A machine control gage system comprising:

• a measuring device that determines a change in size of a workpiece during grinding, and outputs an electrical signal corresponding to the determined change;
• a controller that monitors the size of the workpiece according to the electric signal output from said measuring device, and outputs a signal for controlling a machine tool when a measurement of the workpiece reaches a predetermined size, a minus threshold size being predetermined to be smaller than a target size indicating an end of grinding, said controller continuing monitoring the size of the workpiece for a predetermined period of time according to the electric signal output from said measuring device after the measurement of the workpiece reaches the target size and said controller outputs a first signal instructing said machine tool to complete grinding, said controller outputting a second signal indicating an abnormal size when the measurement of the workpiece reaches the minus threshold size within the predetermined period of time;
• and
• an abnormality display device that shows that the size of the workpiece is abnormal according to the second signal output from said controller.

A machine control gage system comprising:

• a measuring device that determines a change in size of a workpiece during grinding, and outputs an electric signal corresponding to the determined change;
• a controller that monitors the size of the workpiece according to the electric signal output from said measuring device and outputs a signal for controlling a machine tool when a measurement of the workpiece reaches a predetermined size, a plus threshold size being predetermined to be larger than a target size indicating an end of grinding, said controller monitoring the size of the workpiece according to the electric signal output from said measuring device after said machine tool stops machining when the measurement of the workpiece does not reach the target size within a predetermined period of time, said controller outputting an abnormality detection signal indicating an abnormal size if the measurement of the workpiece is larger than the plus threshold size;
• and
• an abnormality display device that shows that the size of the workpiece is abnormal according to the abnormality detection signal output from said controller.