A ball screw coupled directly to a dc servomotor is used to drive one of the table axes of a CNC milling machine. The screw has 4 threads/cm. The optical encoder attached to the screw emits 120 pulses/rev of the screw. (a) What is the control resolution of the system, expressed in linear travel distance of the table axis (in cm)? If the motor rotates at 800 rev/min, determine the (b) frequency of the pulse train emitted by the optical encoder (in Hz) and (c) travel speed of the table (in cm/min).

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Given Data Number of threads per unit length of the screw 4 threadscm Number of pulses per revolutio... View the full answer