Canon W6400 Series Service Manual Download Page 50

Page: 50 / 196

Chapter 2

2-6

F-2-6

2.2.3 Print Control

0008-6332

1. Print mode

This printer is capable of fast, high-quality printing without blurring or inconsistent ink density by changing the carriage operation, sheet feeding operation,

and other printing methods according to the selected paper, print quality, and print data.

Printing is performed for each color using multiple passes. This enables reduction of concentration irregularities caused by the range of discharge amounts

for each nozzle, and the print timing is shifted so that the printed ink is virtually fixed before the next ink layer is applied in order to minimized bleeding.

The printer supports a maximum of 16-pass printing according to the required print quality.

a) Draft mode

In the high-speed (draft) print mode, the image data is thinned out and a single band (equivalent to the width of a nozzle array) is printed in a 2-pass, 4-

pass or 8-pass operation.

This mode is used by selecting the "Draft" option under Print Quality settings in the printer driver.

The printer operation in high-speed mode depends on the printer driver sheet setting. When printing in 2-pass bi-directional format, the image data is

divided into two parts for each color under nozzle block control.

When printing in 4-pass bi-directional format, the mask pattern control divides the image data into two parts for each color, and then nozzle block control

is used to further divide this data into two parts.

When printing in 8-pass bi-directional format, the mask pattern control divides the image data into four parts for each color, and then nozzle block control

is used to further divide this data into two parts for printing.

b) Standard mode

In normal print mode, a single band (equivalent to the width of a nozzle array) is printed in 6-pass or 8-pass operation.

This mode is used by selecting the "Standard" option under Print Quality settings in the printer driver.

The printer operation in standard mode depends on the printer driver sheet setting. When printing in 6-pass bi-directional format, the image data is divided

into three parts for each color under mask pattern control and then nozzle block control is used to further divide this data into two parts for printing.

When printing in 8-pass bi-directional format, the mask pattern control divides the image data into four parts for each color, and then nozzle block control

is used to further divide this data into two parts for printing.

c) High mode

In high quality print mode, a single band is printed using 8-pass or 16-pass operation.

This mode is used by selecting the "High" option under Print Quality settings in the printer driver.

The printer operation in high-speed mode depends on the printer driver sheet setting. When printing in 8-pass bi-directional format, the image data is

divided into four parts for each color under mask pattern control and then nozzle block control is used to further divide this data into two parts for printing.

When printing in 16-pass bi-directional format, the mask pattern control divides the image data into eight parts for each color, and then nozzle block control

is used to further divide this data into two parts for printing.

d) Highest mode

In super-high quality print mode, a single band is printed using an 16-pass operation.

This mode is used by selecting the "Highest" Fine option under Print Quality settings in the printer driver.

The mask pattern control divides the image data into eight parts for each color, and then nozzle block control is used to divide this data into two parts for

16-pass bi-directional printing.

T-2-1

Print Modes

"Shut Down.." is
shown on display

Media detection

Cut sheet

Roll media

Engine controller data

backup

* Writing to EEPROM

System controller data

backup