HP 72SI Manuale Utente Scaricare il pdf (Pagina 108)

4-12 Manual Calibrations

Use a printer’s loupe to select the pattern, since the lines in

the patterns may be difficult to see.

7. Press the , or ) control panel keys repeatedly until the num-

ber next to the pattern that is closest to aligned perfectly is

displayed.

For example, if pattern +2.0 is the closest aligned, press the

, key to change the display to:

HEAD-1 +2.0

If a printhead is extremely out of alignment, there may be

no pattern in alignment. Since the black vertical bars are

nominally five pixels apart, you can add +5 or -5 to a pattern

number to shift the colored bars right or left by one black

bar. Alternatively, you can perform the BiDi Registration

repeatedly, which will move the head in smaller increments,

until the head is aligned.

8. Press ! (Proceed).

The control panel message increments the head number by

one.

9. Repeat steps 6 through 8 for each of the twelve heads.

When you have entered registration values for all heads, the

control panel displays this message:

Registration Successful

Fig. 4-2. BiDi Registration pattern.

+2 0 -2+4+6

1 2 ... 103 104 105 106 107 108 109 110 111 112 113 ... 167 168

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HP 72SI Manuale Utente Pagina 108