Epson SureColor T3000 User Manual page 192

If Auto is selected, the printer will automatically align the head as it prints the head
alignment pattern. The Maintenance menu will be displayed when head alignment is
complete.
If Manual is selected, proceed to step 6 to enter adjustment based on a visual
inspection of the pattern.
6. Note the numbers of the patterns with the fewest white lines or in which the white lines
are most evenly spaced.
This would be pattern 3 of the example shown in the illustration.
7. After confirming that C1 is displayed in the control panel's screen, press the d/u
buttons to select the number noted in step 6 and press the OK button.
8. Repeat for all colors from C1 to BK2, pressing the OK button each time.
9. The Maintenance menu will be displayed once the last number has been entered.
Maintenance 192