Home Machine InformationCurl Adjustment: Reducing Curl (Relay Unit RU-509)

Curl Adjustment: Reducing Curl (Relay Unit RU-509)

[RU Curl Adjustment] is displayed for the machine mounted with Relay Unit RU-509. Press [RU Curl Adjustment] to display the [RU Curl Adjustment] screen.

Curl adjustment is performed by Relay Unit RU-509.

You can perform curl adjustment using the following two methods:

  • Mechanical method: Decurl section strokes the paper to reduce curl. Select one of nine curl correction strength levels.

  • Humidification method: Use the decurl unit of Humidifier HM-102 to humidify the paper and adjust the amount of moisture contained in the paper after printing to reduce curl.

  • The curl adjustment can be set to a tray by registering paper conditions, including the curl adjustment, in a paper profile and recalling them from the paper profile.

Setting Curl Adjustment

  • The mechanical curl adjustment is effective for coated paper.

  • Both the mechanical and the humidification curl adjustment are effective for paper, except for coated types.

  • In addition to the decurl unit of Relay Unit RU-509, the other feeding parts also help to reduce curl by cooling paper after printing.

  1. Press the [MACHINE] tab to display the [MACHINE] screen.

  2. Press [RU Curl Adjustment].

  3. Press a paper tray key under [Tray Setting] to select a tray that you want to set the curl adjustment.

  4. Select an adjustment direction and a strength level for the mechanical curl adjustment.

    • Selecting [0] performs the mechanical curl adjustment to correct paper curl. If paper is still curled, the correction is required as the list shown below.

    • If you do not perform the mechanical curl adjustment, select [OFF]. Selecting [OFF] minimizes dirt with toner on printed paper.

    • Specify the adjustment value to be positive or negative based on the table below.

    Curl Adjustment direction

    Strength level

    [+0.5][+1][+1.5][+2]

    [-0.5][-1][-1.5][-2]

    • Pressing [Reset] sets the mechanical curl adjustment value to [0] for all trays.

  5. Specify whether or not to make the humidification curl adjustment.

    To make the humidification curl adjustment, select [ON] for [Humidifier Setting], or select [OFF] when not.

    • While Humidifier HM-102 is mounted, pressing [Reset] resets the machine as described in the table below.

    • Contact your service representative if setting change for Plain or Fine is desired.

    Paper Type

    Weight

    Humidification curl adjustment ON/OFF

    Plain, Fine

    62 g/m2 to 300 g/m2 / 16 lb Bond to 68 lb Bond

    ON

    Color Specific

    Coated-GL/ML/GO/MO

    62 g/m2 to 135 g/m2 / 16 lb Bond to 36 lb Bond / 16 lb Bond to 36 lb Bond

    Unavailable

    136 g/m2 to 300 g/m2 / 37 lb Bond to 81 lb Bond / 37 lb Bond to 81 lb Bond

    OFF

  6. Press [OK].

    The screen returns to the [MACHINE] screen.