8. A CNC user wants to remove a stepper motor from one axis of a CNC drilling machine table and replace it with a permanent magnet DC motor, to his drilling machine table. The stepper motor, (1 rotation in 200 steps) and 1 step for every pulse, receives pulses from a pulse generator at the rate of 5000 pulses per minute and was driving a lead screw nut pair of pitch 4 millimetres. The permanent magnet DC motor rotates at a constant speed of 100 rpm and after fitting, should produce the same basic length unit and axes speed as before. This is the requirement; You are going for a permanent magnet motor from instead of a stepper motors, but we want to retain the values of basic length unit and axes speed. The user may employ any lead screw nut pair and 1 gearbox and 1 encoder combination from the inventory listed below. No equipment other than these is permitted, encoder is used should be mounted on the lead screw. Solve this problem? Encoders, h 400 holes 300 holes 200 holes Lead of Lead screw- Gear boxes with nut pairs =L ratio = U 4 mm 1 6 mm 8 mm