Print Position Adjustment Function; Head Management; Printhead Overheating Protection Control; Pause Between - Canon imageprograf ipf700 Service Manual

Chapter 2

2.2.4 Print Position Adjustment Function

This printer supports a print position adjustment function to adjust the vertical and horizontal print position and
the bidirectional print position of the print head mounted on the carriage and the feed rate.
Print position adjustment work in two modes: automatic adjustment, in which print position adjustment patterns
printed are detected by a multisensor attached to the lower left part of the carriage, and manual adjustment, in
which print position adjustment patterns that are slightly modified from one another are printed, so that visually
verified adjustment values can be set from the operation panel.
To make print position adjustment, A4-or-larger-sized roll media or cut media are needed.

2.2.5 Head Management

This printer supports a nozzle check function to spot non-discharging nozzles in the printhead. When the printer
detects a non-discharging nozzle, it starts cleaning the printhead automatically to correct its discharge failure.
If cleaning does not work, the printer backs up the non-discharging nozzle with an alternative nozzle
automatically to ensure unfailing print performance.
Detection timings (automatic): Power-on, open carriage cover detection, print start (check timing variable by
selecting Nozzle Check from the system menu)

2.2.6 Printhead Overheating Protection Control

When an abnormal temperature rise in the printhead is detected, overtemperature protection control launches.
Overtemperatures could occur in the printhead after a spell of print operations without the nozzles being filled
with inks.
Overtemperature protection control prevents non-discharge failures and damages that might result from an
overheated printhead.
overtemperature protection control is implemented on the basis of the temperature detected by the head
temperature sensor for each nozzle. When an abnormal temperature is detected in any nozzle train,
overtemperature protection control is exerted at one of two levels according to that temperature.
Protection level 1
If the head temperature sensor (DI sensor) has detected a temperature higher than the protection temperature, it
halts the carriage temporarily at the scan end position in the direction of travel according to the carriage scan
status.
Printing resumes when the printhead radiates naturally to cool down to below a predetermined temperature or
when 30 seconds or longer have elapsed since the detection of the temperature higher than the protection
temperature.
Protection level 2
When the head temperature sensor (DI sensor) has detected an abnormal temperature, the printer shuts down the
print operation immediately, moving the carriage to the home position for capping, with an error indication on
the display.
2.2.7 Pause between Pages
An inter-page function is available to prevent ink rubbing, which keeps paper just printed hanging above the
platen and waiting for a predetermined period of time before delivery.
The wait time is user-programmable from the print driver. This feature is particularly useful on paper that takes
time to dry after printing.
A 30-second drying time is set automatically for borderless printing.

2.2.8 White Raster Skip

This printer supports a white raster skip function to bypass carriage scanning in a consecutive sequence of voids
in print data for added throughput.
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