The causes of random-size variations and random-taper variations in feed-rate grinding are described and related to stock variations and wheel-sharpness variations. A new technique, controlled-force grinding, is presented which eliminates errors resulting from variable elastic deflections. An analysis is made of the rounding-up dynamics of the controlled-force system and a critical workspeed is found which must be exceeded in order to have a rounding-up action. A study is also made of the stability of the system using the Nyquist criterion.

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