Reducing Horizontal Bands (Feed Correction Function) - Roland TrueVIS VG2-640 User Manual

Using the Correction Functions

Reducing Horizontal Bands (Feed Correction Function)

Perform corrections to make the band-shaped "stripes" on the printed surface less noticeable.
The band-shaped "stripes" are called "horizontal bands" or "banding." Horizontal bands are caused by the subtle
changes in the movement distance that occur when feeding the media depending on the media's thickness and
the temperature of the dryer. We recommend that you make corrections to match the media you are using and
the set temperature of the dryer.
First, print a test pattern, and then determine and enter the correction value. After entering the correction value,
print a test pattern again and check the correction results. Repeat the process of printing a test pattern and enter-
ing a correction value several times to find the optimal correction value.
Procedure
1.
If using roll media, check that the media is not sagging.
2.
Press [MENU].
3.
Press [▼] several times to display the screen shown below.
MENU
CALIBRATION
4.
Press [▶] to display the screen shown below.
CALIBRATION
TEST PRINT
5.
Press [ENTER].
Printing of the test pattern starts.
6.
When printing of the test pattern is finished, press [▼], then [▶] to display the screen shown below.
SETTING
0.00%
7.
View the printed test pattern, and then determine the correction value.
= Current correction value (
per/lower squares smallest. In the case of the following figure, select "-0.40." When you cannot choose be-
tween two sequential numbers, specify a value that is between them.
8.
Press [▲] or [▼] to select the correction value.
SETTING
0.00%
9.
Press [ENTER] to confirm your entry.
10.
Press [◀] or [▼] to display the screen shown below.
142
1. Optimizing the Output Quality
0.00%
) Select the value to make the gap ( ) and overlap (
-0.40%
) between the up-