Abstract: A system and method for controlling operation of a machine tool such as a grinder wherein engagement of the machine tool with a workpiece is controlled in real time by a workpiece measurement signal from a gage likewise engaged with the workpiece. The measurement gage is periodically brought into measuring engagement with a gage master having a predetermined master dimension relative to the desired machined size of the workpiece. The resulting gage master measurement signal is compared with a reference, and a compensation signal is generated and stored as a function of the magnitude and polarity of any departure from the gage master measurement signal from the gage master reference signal. Thereafter, during the machining mode of operation, motion of the machine tool is controlled as a combined function of the workpiece measurement signal and the compensation signal generated and stored during the calibration mode of operation.

Abstract: A display device for alphanumeric characters using a sixteen segment configuration for each character, eight segments in an outer ring and eight segments in an inner configuration. The segments are joined in an eight-by-two matrix which is multiplexed, there being two time intervals for each character. The display medium may be liquid crystal or any other known dual plane medium such as colloidal suspension. In one plane, the inner eight segments are multiplexed into one group, while a second group multiple extends to the external eight segments. In the other plane, each outer segment is connected in series with an inner segment to form eight segment pairs. To display a desired character, selected pairs in one plane are energized with either the inner or outer multiple during one time interval to illuminate all segments common to the selected pairs and the selected group. During a second time interval, other selected pairs are energized with the other group. Successive characters are driven sequentially.