Specifying the Area to Detect Multifeed [Document check area specification for Multifeed Detection]

The following setting is only available when you specified [Check Overlapping (Ultrasonic)].

  1. From the list on the left, select [Device Setting 2] → [Document check area specification for Multifeed Detection].

    Select the [Selected range] check box in the window.

    Selected range
  2. Specify the detection range.

    Range

    Description

    Selected range

    Select the check box to specify the detection range (colored in light pink) in the picture below.

    Range

    Select the check box to enable the setting in this window. Clear the check box to disable the setting. Clearing this check box sets both the start and the end positions to "0", so that multifeed is detected for the whole document.

    The above condition applies when the document is set to the center of the pick roller width.

    Disable (Left/Middle/Right)

    Does not detect multifeeds for the selected area.

    Enable (Left/Middle/Right)

    Detects multifeeds for the selected area.

    Start (Left/Middle/Right)

    Displays the starting point of the detection by the length from the leading edge of the document.

    Range: 0 to 510 mm, in 2 mm increments, Start < End

    End (Left/Middle/Right)

    Displays the end point of the detection by the length from the leading edge of the document.

    Range: 0 to 510 mm, in 2 mm increments, Start < End
    HINT

    • When both [Start] and [End] are set to "0", multifeed detection is performed for the whole area regardless of whether it is enabled or disabled.

    • To disable multifeed detection for the whole document, select [Disable] and set the start position to "0" and the end position to be equal to or longer than the document length.

    • If the start position is set larger than the document length: with [Disable], the whole range covering the entire document length will be checked; with [Enable], the multifeed detection will be disabled.

    • To detect multifeeds, the detection range must be at least 8 mm in length.

      Configure the settings so that the value of the end position minus the start position is 6 mm or more.

    • You can also set the start position and the end position by the following methods:

      • Create a square or rectangle to indicate the detection range by dragging your mouse pointer on the displayed image in the dialog box.

      • Drag the handle for the detection range to change the start and end positions using the mouse pointer on the displayed image in the dialog box.

Example 1:

Setting details are as follows.

  • Specified position: Left

    Selected range = Disable, Start = 50 mm, End = 200 mm

  • Specified position: Middle

    Selected range = Enable, Start = 50 mm, End = 200 mm

  • Specified position: Right

    Selected range = Disable, Start = 50 mm, End = 200 mm

Multifeed

Multifeed is detected only for the areas in light pink.

Example 2:

Setting details are as follows.

  • Specified position: Left

    Selected range = Disable, Start = 0 mm, End ≧ 300 mm

  • Specified position: Middle

    Selected range = Enable, Start = 0 mm, End = 0 mm

  • Specified position: Right

    Selected range = Disable, Start = 0 mm, End = 0 mm

Multifeed

Multifeed is detected only for the areas in light pink.

HINT

When detecting the overlapping of documents, the multifeed detection rate may drop if the documents are glued tightly or attached together by static electricity.

Example 3: (Bad example)

Setting details are as follows.

  • Specified position: Left

    Selected range = Disable, Start = 310 mm, End = 400 mm

  • Specified position: Middle

    Selected range = Enable, Start = 320 mm, End = 450 mm

  • Specified position: Right

    Selected range = Enable, Start = 100 mm, End = 102 mm

Multifeed

Since the detection range (length) is less than 8 mm, multifeeds cannot be detected correctly.