Roland TrueVIS VG-640 User Manual page 40

Basic Printing Method
C
View the printed test pattern, and then determine the correction values from "BI-DIR
NO.1 H1" to "BI-DIR NO.1 H4."
The test pattern is made of groups of two lines. Select the value that gives the least misalignment
between the two lines. In the case of the following figure, select "+5" for H1 and H3 and "+4" for H2
and H4. 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").
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