Abstract: A temperature insensitive gauge is disclosed. The temperature insensitive gauge includes a frame having a first and second caliper assembly movably mounted on the frame. The first and second caliper assemblies engage a workpiece. A mechanism for measuring the relative movement between the caliper assemblies is associated with the assemblies. The measuring mechanism provides measurement information on the size of the workpiece. A compensating mechanism is associated with the caliper assemblies for reducing thermally induced dimensional changes in the gauge.

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: An automatic control for a grinding system is disclosed for controlling the advancement of a grinding wheel into a workpiece to provide a substantially constant time span between the termination of the operation of the feed means which advances the grinding wheel and the attainment of the final size of the workpiece for each workpiece machined. The control generates a reference time span and if the actual time span deviates by more than a preselected time period from the reference time span, the control develops a control signal adjusting the advancement of the grinding wheel during the grinding of the following workpiece.

Abstract: An automatic control for a grinding system is disclosed for controlling the advancement of a grinding wheel into a workpiece to provide a substantially constant time span between the termination of the operation of the feed means which advances the grinding wheel and the attainment of the final size of the workpiece for each workpiece machined. The control generates a reference time span and if the actual time span deviates by more than a preselected time period from the reference time span, the control develops a control signal adjusting the advancement of the grinding wheel during the grinding of the following workpiece.