Original Transport

The feed motor [A] rotates the feed belt [B], pickup roller [C], and separation roller [D] to feed the original once the machine receives the command to feed. The fed original hits the grip roller. This prevents the paper from skewing diagonally in the original feed path.

After skew adjustment at the grip roller, grip motor [A] and relay motor [B] turn the rollers [C] that feed the original to the scanner unit below. 

When the scanner entrance sensor [A] detects the original, the scanner motor [B] switches on and rotates the white roller [C] and feeds the original to the scanner unit. The registration sensor [D] detects the leading edge and trailing edge of the original, and the machine maintains a pulse count between these two events.

After the grip roller starts to rotate:

• The grip motor increases its rotation speed slightly in order to reduce the gap between the original and the downstream original being scanned.
• If this higher speed was maintained, the leading edge of the original would collide with the trailing edge of the downstream original.
• To compensate for the higher speed, when the leading edge is detected at the skew correction sensor, the speed of the feed belt is reduced, and the line speed slows as the leading edge of the original reaches the nip of the pre-scanning roller.
  

When exit sensor [A] detects the original, exit motor [B] turns on and rotates exit rollers [C] which feed the original out onto the exit tray.