The illustration shows the decurler unit removed from the left side of the main machine.

  • The decurler feed motor [A] drives the rollers that feed paper through the decurler unit.
  • The decurler unit motor [B] drives the timing belt and gear that raise and lower the decurler unit on the paired rack and pinions at the rear [C] and front [D].

The up and down movement of the decurler unit is controlled by two sensors.

  • Before a print job, the decurler unit HP sensor [1] detects the home position of the decurler unit.
  • To correct face curl, the unit is raised [A] the distance specified by the user. If the decurler unit limit sensor [2] detects the bottom actuator, this triggers the over limit error (SC593).
  • To correct back curl, the unit is lowered [B] the distance specified by the user. If the decurler unit limit sensor [3] detects the top actuator, this triggers the over limit error (SC593).

Moving the decurler roller up or down changes the amount of pressure applied to the paper to correct paper curl. The maximum range of the decurler unit movement is ±13.85 mm from the home position of the decurler unit.

The amount of pressure applied to correct paper curl can be adjusted using Adjustment Settings for Skilled Operators.

  1. Log in as the machine administrator from the operation panel.
  2. Touch "Adjustment Settings for Operators".
  3. Touch No. 0304 "Correct Output Paper Curl".
    • Settings are displayed for adjusting the amount of pressure (Weak or Strong) for all the trays (Tray 1 to 12).
    • To adjust the amount of pressure applied for "Weak" or "Strong", use SP1906-1 to 12.