- 4 2 It Is Well Known To Many Engineers That A Cnc Machine Tool Table Is Powered By A Servomotor Leadscrew And Optical 1 (53.59 KiB) Viewed 66 times
4.2 It is well known to many engineers that a CNC machine tool table is powered by a servomotor, leadscrew, and optical encoder. The leadscrew pitch of 4 mm which is connected to the motor shaft with a gear ratio of 7:1 (8 turns of the motor for each turn of the leadscrew). The optical encoder connected to the leadscrew and generated 90 pulses/rev of the leadscrew. The table moves 260 mm at a feed rate = 430 mm/min. Determine 4.2.1 The pulse count received by the control system to verify that the table has moved exactly 260 mm. (3) 4.2.2 The pulse rate (3) 4.2.3 Motor speed that correspond to the feed rate of 430 mm/min. (3) [11]