Canon iPF605 - imagePROGRAF Color Inkjet Printer, Service Manual

Page: 74 / 268

Chapter 2
2-12
2.2.4 Print Position Adjustment Function
0012-6498
This printer has a printing position adjusting function to adjust the lateral and longitudinal printing positions and bidirectional printing position of the printhead
mounted on the carriage as well as the media feed amount.
The printing position can be adjusted in two ways: "automatic adjustment" by which the multi sensor installed at the lower left of the carriage reads the printing
position adjusting pattern and "manual adjustment" by which a print position adjusting pattern is printed with the printing conditions changed little by little to allow
the user to enter the visually checked adjustment value from the operation panel.
Printing position adjustment requires A4-size or larger roll media or cut sheet.
2.2.5 Head Management
0012-6499
This printer has a nozzle check function to detect any non-discharging nozzle. When a non-discharging nozzle is detected, the printer performs the print head clean-
ing operation. If the problem persists after completion of the print head cleaning operation, the non-discharged nozzles are automatically backed up by other nozzles.
2.2.6 Printhead Overheating Protection Control
0012-6501
This printer performs printhead overheating protection control when an abnormally high temperature is detected in the printhead.
The printhead can overheat, for instance, when the print operation continues for some time with no ink supplied to the nozzles.
The overheating protection control function prevents a print head nozzle from becoming clogged or damaged due to excessive heat.
Overheating protection control is performed based on the temperatures detected by the head temperature sensors in the nozzle arrays. If overheating is detected in
a single nozzle array, overheating protection control is performed at either of the following levels according to the temperature.
Protection level 1:
If the printhead temperature sensor detects a temperature above the limit, the carriage stops at the scan end position printer in the direction of travel according to
the carriage's scan status.
Then, wait control is performed to allow the printhead to cool naturally. When the printhead temperature drops below the prescribed value or 30 seconds have lapsed
since detection of the abnormal temperature, printing resumes.
Protection level 2:
When the head temperature sensor detects an abnormally high temperature, printing stops immediately, the carriage is moved to the home position, and the printhead
is capped. In this case, an error code is shown on the display.
2.2.7 Pause between Pages
0012-6502
To prevent ink blots form forming, this printer has a "pause between pages" function to hang down the printed paper from the platen to dry it and delivers it after
lapse of the specified wait time.
The user can set the wait time using the printer drive. This function is particularly useful for printing on film-type sheets that requires extra long time to dry.
For borderless printing, 30 seconds of drying time is automatically set.
2.2.8 White Raster Skip
0012-6504
To improve the printing throughput, this printer has a white raster skip function to skip the carriage scan operation for continuous blank segments in print data.
2.2.9 Sleep Mode
0012-6505
This printer has a Sleep mode to reduce the standby power.
The printer automatically enters the Sleep mode (Power Save mode) when neither user operation nor data reception occurs for a preset period of time in the online
or offline mode.
The printer wakes from the Sleep mode when the user presses any button on the operation panel or data is received from the host computer.
The time until the printer enters the Sleep mode can be changed from the operation panel. (Default: 5 minutes)
2.3 Printer Mechanical System
2.3.1 Outline
2.3.1.1 Outline
0019-6095
The printer mechanism can be broadly divided into two major components: the ink passage and paper path.
The ink passage consists of an ink tank, a carriage unit having a printhead, a purge unit. and a maintenance cartridge unit which are used to supply, circulate, and
suck ink.
The paper path consists of a roll feed unit, paper feed unit to support three types of media feeding, transport, and ejection.
This section provides an overview of these mechanical components.