Epson Stylus Pro 9500 Service Manual page 180

EPSON Stylus Pro 9500
HEAD GAP ADJUSTMENT (ALIGNMENT BETWEEN HEADS)
NOTE: This corrects the printing position between the B and C
heads. For adjustment, uni-directional printing is carried out
and the print position error is judged in the printing results,
then correction values are set. Adjustment items are as
follows. The numbers in the above table are printed at the
beginning of the printing pattern when the adjustment
pattern is printed and show the adjustment pattern No.
Table 5-7. Head Gap Adjustment
Gap/200/M Head GAP adjustment / 240 cps / Normal Dot
Gap/300/N Head GAP adjustment / 333 cps / Normal Dot
1. Make sure "Adj: Head LR Adj" is displayed in the LCD. Press the [Enter]
button to print the adjustment patterns.
2. After all the adjustment patterns (#5 and #6) have been printed, "Gap, 200,
M: XXX" will be displayed in the LCD.
Black vertical lines
This pattern has no relationship to the
Gap adjustment.
Figure 5-9. Head Gap Adjustment Pattern.
Adjustment
No.
#5
#6
Light Cyan vertical lines
Adjustment Steps
3. Check printing patterns No. 5 and No. 6, and check for deviation of the
black vertical lines in the 1st and 3rd pass and in the light cyan vertical
lines in the 2nd pass.
o
If there is no deviation in the patterns in printing patterns No. 5 and No. 6,
press the Paper Source button 2 times, then check if the message "Gap
End." is displayed in the LCD. Proceed to Step 16.
o
If there is deviation in the patterns in printing patterns No. 5 or No. 6, press
the Paper Type button to move to the corresponding pattern adjustment
menu, then input the appropriate numerical values using the Paper Feed +/
– keys. After inputting the correction value, press the Enter button to print
the results of the input correction values. The relationship between the
inputs using the Paper Feed + / – buttons and the printing results is as
shown below.
n Adjustment value minimum resolution:1/2880 Inch
n
Correction Direction: Paper Feed – Button = Moves the black lines
in the 1st and 3rd passes toward the HP side.
Paper Feed + Button = Moves the light cyan
lines in the 2nd pass away from the HP side.
n Adjustment Target: There should be no deviation in the black lines
and the light cyan lines.
4. Repeat the above steps 14 and 15 until the adjustment of patterns No. 5
and No. 6 is completed.
5. After confirming that "GAP End." is displayed in the LCD, proceed to the
next adjustment item.
Revision A
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