Question: In Problem the axis corresponding to the feed rate uses a dc servomotor as the drive unit and an optical encoder as the feedback sensing device. The motor is geared to the lead-screw with a 10:1 reduction (10 turns of the motor for each turn of the leadscrew). If the leadscrew pitch = 5 mm, and the optical encoder emits 400 pulses per revolution, determine the rotational speed of the motor and the pulse rate of the encoder to achieve the feed rate indicated.
Problem: An end milling operation is performed on an NC machining center. The total length of travel is 625 mm along a straight line path to cut a particular work piece. Cutting speed = 2.0 m/sec and chip load (feed/tooth) s 0.075 mm. The end milling cutter has two teeth and its diameter = 15.0 mm. Determine the feed rate and time to complete the cut.