Correcting For Misalignment In Bidirectional Printing More Precisely - Roland TrueVIS VG-640 User Manual

C
View the printed test pattern, and then determine the correction value.
Select the value that gives the least misalignment between the two lines. In the case of the following
figure, select "+5."When you cannot choose between two sequential numbers, select a value that
is between them (you can set correction values in units of "0.5").
D
Press [ ] or [ ] to set the correction value.
SIMPLE SETTING
0
E
Press [ENTER] to confirm your entry.
1
F
Repeat step to check whether the correction was successful.
Check that the misalignment is minimized for the two vertical lines indicated by "
current correction value). If the misalignment is smaller for another set of vertical lines, set the cor-
rection value again.
G
When you have successfully performed the correction, press [MENU] to go back to
the original screen.
Description
This machine performs bidirectional printing (in which the heads perform printing during both their outbound
pass and return pass). This method offers the advantage of being able to shorten output times, but subtle
misalignment occurs during the outbound and return passes, which makes "bidirectional correction" necessary.
This misalignment varies according to the print head height and the thickness of the media, so we recommend
performing correction to match the media you are using.

Correcting for Misalignment in Bidirectional Printing More Precisely

When further correction is required, such as when adjustment made using [SIMPLE SETTING] does not enhance
printing, use [DETAIL SETTING] to make corrections.
For instructions on how to perform the work, refer to P. 37 "Step 2 : Initial Adjustment (Correcting for Mis-
alignment in Bidirectional Printing)".
5
Correction Functions
" (that is, the
125
4