초록 ▼

A lapping machine control system which utilizes a electromechanical probe to generate a signal responsive to the separation of the laps, which also represents the thickness of the part being lapped. The separation signal, which is unsuitable for direct control since it is too noisy, is used with a b

A lapping machine control system which utilizes a electromechanical probe to generate a signal responsive to the separation of the laps, which also represents the thickness of the part being lapped. The separation signal, which is unsuitable for direct control since it is too noisy, is used with a best fit algorithm to estimate the time to reduce the part to the desired thickness, based on the rate of material removal provided by extrapolated line representing the best fit of the lap separation signal. The machining is terminated when the extrapolated line reaches the intercept of time and thickness.

대표청구항 ▼

A lapping machine control system comprising: a. means for measuring the relative positions of first and second laps to develop analog signals representing the instantaneous distance between said laps; b. analog to digital converter means for converting said analog signals to digital form; c. control

A lapping machine control system comprising: a. means for measuring the relative positions of first and second laps to develop analog signals representing the instantaneous distance between said laps; b. analog to digital converter means for converting said analog signals to digital form; c. control computer means for reading said digital signals as periodic intervals; d. curve fitting means in said computer means for developing a curve representing the separation of said laps as a function of time; e. extrapolation mans in said computer means for predicting the point in time when the separation of said laps will reach a desired value; and, f. means coupled to said extrapolation means for changing mode of said lapping machine when said point in time is reached.