Stepper motors were and still are often used in computer printers, optical scanners, and digital photocopiers to move the optical scanning element, the print head carriage (of dot matrix and inkjet printers), and the platen or feed rollers. Likewise, many computer plotters (which since the early 1990s have been replaced with large-format inkjet and laser printers) used rotary stepper motors for pen and platen movement; the typical alternatives here were either linear stepper motors or servomotors with closed-loop analog control systems. COUNT 3
QSN1 List two alternatives to rotary stepper motors in printer applications. ANS1 linear stepper motors or servomotors QSN2 In scanners, what do stepper motors move? ANS2 optical scanning element QSN3 In printers and copiers, what do stepper motors move? ANS3 print head carriage (of dot matrix and inkjet printers), and the platen or feed rollers