Auto-Nozzle Check Module; Overview - Ricoh MP CW2201 Field Service Manual

7. Detailed Description
The illustration above shows droplets of mist
nozzles. This undesirable condition is corrected with periodic automatic cleanings while the printer is in
use, greatly extending the length of time the machine can be used without operator intervention.
• Mist count. A "mist count" triggers automatic cleaning. This mist count can be extended to increase
the timing between automatic cleanings. The mist count, which determines the intervals between
automatic cleanings, has been doubled for this machine.
• Count adjustment. The count is automatically adjusted for the width of the paper and total print
area.
• Paper dust count. The paper dust count (the total number of pages printed, cutting count) is used to
determine when cleaning is done for paper dust.

Auto-Nozzle Check Module

Overview

The auto-nozzle check function detects whether the nozzle drops ink correctly. It checks the change in
electrical charge caused by the ink dropped to the electrode plate at constant intervals. If ink is not
dropped well but the effect is not so serious, the adjacent nozzles drop larger dots for printing to
minimize the effect. If the effect is serious, the print head is cleaned automatically.
The part on which the electrode plate and slider are placed is called the holder. It is made of plastic to
maintain high voltage of the electrode and insulation properties of GND.
Name
Electrode plate for detection
Wiper
864
and paper fibers and dust
Placed facing the nozzle and charged to 500 V when detecting.
Wipes ink from the electrode with the slider after ink drop detection
process.
that can collect near the
Function