Epson Stylus Photo R280 Service Manual page 25

Epson Stylus Photo R280/R285/R290/Epson Artisan 50/Epson Stylus Photo T50/T59/T60/P50
2.2 Banding Reduction System (BRS) / Paper Feed Amount Profile Correction (PFP)
Overview
In order to ensure high print quality and high print speed, this product incorporates the Banding Reduction System (BRS) and Paper Feed Profile (PFP) Correction system. The
overview of them is described in the table below.
Conventional models perform overlapping printing (2-path or 4-
path print) to reduce banding problem. Printers that incorporate the
Banding Reducing System do not perform the overlapping printing.
BRS They carry out 1-path printing correcting ink drop amount for each
raster mode in order to avoid making a gap between each path
(printed line). This enables to achieve both high print quality (less
banding) and high print speed.
In the conventional method to improve paper feed accuracy, the
adjustment value is calculated based on a value obtained at a
certain point of paper. Therefore, correcting the total paper feed
amount (from when paper is fed and to when finishing printing)
PFP was impossible. The Paper Feed Amount Profile Correction offers
more precise control over the paper feeding. Paper feed errors are
measured at various points and a correction value is calculated for
each of the points. This enables to ensure print quality in the target
print mode.
Adjustment/Correction method
Correction values of the BRS and the PFP are automatically calculated when a pattern printed by the printer is scanned by a specified scanner. The created correction
values are stored into the serial flash ROM on the main board, and applied when printing in the target print mode.
For information on how to carry out the BRS and PFP,
A D J U S T M E N T
R E Q U I R E D
See Chapter 5 Adjustment.
Chapter 2 Operating Principles
Table 2-4. Overview of BRS and PFP
Summary
2.2 Banding Reduction System (BRS) / Paper Feed Amount Profile Correction (PFP)
Target Print Mode
Paper Type
Ultra Glossy Photo Paper
Premium Glossy Photo Paper
Glossy Photo Paper (102 x 152 mm)
Premium Semigloss Photo Paper
Ultra Glossy Photo Paper
Premium Glossy Photo Paper
Glossy Photo Paper (102 x 152 mm)
Premium Semigloss Photo Paper
Paper Size Resolutions (dpi)
4 x 6 inch
720 x 720
720 x 720 With BRS, Borderless print
4 x 6 inch
720 x 360
Revision C
Remarks
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Without BRS,
Borderless print
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