Printing Modes - Canon BJC 50 - Color Inkjet Printer Service Manual

Part 4: Technical Reference

2.3 Printing Modes

Depending on the cartridge installed, the medium, the printing mode, the resolution,
the print data, etc., the printer varies the carriage movement, bubble jet head driving
frequency, etc., to attain high-quality printing without any bleeding or shifting in the
printout. When the 720 dpi printing/smoothing feature is used, the carriage feed pitch
is set to1/720 inch. Although this slows down the carriage speed, the bubble jet head
drive frequency (heat frequency) is increased so that the overall printing throughput
decreases.
During color printing at a single pass, the different colors printed at the same time
overlap, often causing the colors to run. By printing with three passes, color bleeding
is less prone to occur since the color printed immediately before is stable by the time
the next color is printed over it. When print data is processed internally by the printer,
the data is recognized and the number of ink nozzles to be used by the black ink is
change automatically.
The printing method for the respective printing modes are listed below.
TABLE 4-1 PRINTING MODES AND HEATING METHODS
With a Black BJ Cartridge
Printing Mode
Bk-HS
Bk-HQ
Bk-FINE
Bk-Smoothing
Bk-HQ (720)
Bk-FINE (720)
With a Color BJ Cartridge
Printing Mode
Bk & White-HS
Bk & White-HQ
Bk & White-FINE
Color-HS
Color-HQ
Color-FINE
Color-HQ (720)
Color-FINE (720)
* When the print resolution is 720 dpi, print data is not thinned.
* When the print resolution is 720 dpi, processing to prevent colors running at the
borders is not executed.
Carriage Number of
Movement Nozzles
1 pass 128 nozzles
1 pass 128 nozzles
4 passes 32 nozzles
1 pass 128 nozzles
1 pass 128 nozzles
4 passes 32 nozzles
Carriage Number of
Movement Nozzles
1 pass 64 nozzles
1 pass 64 nozzles
4 passes 16 nozzles
1 pass 24 nozzles
1 pass 24 nozzles
3 passes 8 nozzles
1 passes 24 nozzles
3 passes 8 nozzles
Resolution Carriage Speed
[dpi]
180
360
360
360
720
720
Resolution Carriage Speed
[dpi]
180
360
360
180
360
360
720
720
4-16
Heat Frequency
[kHz] [kHz]
7.82 7.82
6.43 6.43
6.43 6.43
3.91 7.82
6.43 12.86
6.43 12.86
Heat Frequency
[kHz] [kHz]
7.82 7.82
6.43 6.43
6.43 6.43
7.82 7.82
6.43 6.43
6.43 6.43
4.73 9.46
6.43 12.83
BJC-50