The positioning roller and drag roller operate as follows:

  1. The positioning roller shift motor [A] moves the positioning roller [D] down at the start of every job.
    1. The positioning roller motor [B] rotates the positioning roller [D] to feed the paper to the stapler tray.
    2. The positioning roller motor [B] also rotates the drag roller [C]. The drag roller [C] is a sponge roller that pushes paper against the bottom pawl, in order to hold paper in the stapling position.