Manual Adjustment: Reducing Horizontal Bands (Feed Correction Function)

Perform corrections to make the band-shaped "stripes" on the printed surface less noticeable.

The band-shaped "stripes" are called "horizontal bands" or "banding." Horizontal bands are caused by the subtle changes in the movement distance that occur when feeding the media depending on the media's thickness and the temperature of the dryer. We recommend that you make corrections to match the media you are using and the set temperature of the dryer.

First, print a test pattern, and then determine and enter the correction value. After entering the correction value, print a test pattern again and check the correction results. Repeat the process of printing a test pattern and entering a correction value several times to find the optimal correction value.

Procedure
  1. Load the media.
  2. Close the front cover.
  3. Tap AP-640_Panel_Icon_MENU.
  4. Tap Media Settings - Printing Settings - Feed Correction.
  5. Select Detailed Correction (Manual) and tap Next.
  6. Tap Execute next to Printing Test.
    Printing of the test pattern starts.
  7. Check the printed test pattern, and then tap AP-640_Panel_Icon_MINUS or AP-640_Panel_Icon_PLUS to enter the correction value.
    The current correction value (A) is that of the figure indicated by "." Select the value to make the gap (B) and overlap (C) between the upper/lower squares smallest. In the case of the following figure, select "−0.40" (D). When you cannot choose between two sequential numbers, specify a value that is between them.


    MEMO
    • If the test pattern is difficult to see, tap AP-640_Panel_Icon_UP or AP-640_Panel_Icon_DOWN next to Media Feed to move the media to a position where it is easier to see.
    • If you want to hold the media to check the test pattern, tap Execute next to Sheet Cutting to separate the media.
  8. Tap Save.
    The entered correction value is saved.
  9. Tap Execute next to Printing Test.
    The test pattern is printed again.
  10. Check the test pattern to see whether the correction was successful.
    Check that the gap and overlap are the smallest for the figure indicated by "" (that is, the current correction value). If the gap and overlap are smaller for another figure, set the correction value again.
  11. When you have successfully performed the correction, tap AP-640_Panel_Icon_HOME to go back to the original screen.