Timing For Detection; Detection - Ricoh MP CW2201 Field Service Manual

Hide thumbs Also See for MP CW2201:

Table of Contents

Wiper cleaner

Ink collector tank

Wiper drive motor

Wiper position sensor

Wipe position sensor (home

Auto-nozzle check board

Timing for Detection

The frequency of Auto-Nozzle Check can be set in the initial settings. The period required for one check

is 25 seconds (no ink deficiency for five heads).

• Standard (default): For every maintenance cycle (automatic and manual) and before printing after

10 hours have passed after detecting ink deficiency in the previous purging detection.

• Frequent: Before printing or for automatic cleaning between pages.

• OFF: No nozzle check (the same conditions as MP CW2200)

Auto-Nozzle Check does not function at 9°C or lower or 36°C or higher, because such environments

affect detection accuracy.

The print head performs air purging before printing, moves over the electrode plate charged at 500 V,

and starts dropping ink. Dropping of the negatively-charged ink onto the electrode plate causes

variation in the charge of the electrode plate. The auto-nozzle check board detects this charge variance

and judges whether to drop ink or not.

Each print head has 192 nozzles. Each nozzle drops ink and checked one by one. They do not drop ink

all at once.

For example, the 1st nozzle drops ink and is checked, then the 2nd nozzle drops ink and is checked,

then the 3rd nozzle and soon until the 192nd nozzle.

A wiper is attached. It wipes the electrode by moving back and

forth, driven by the timing belt beneath the holder.

Scrapes ink off the wiper with the cutout when the wiper returns to its

home position after wiping.

Collects the ink scraped with the wiper cleaner

Moves the slider back and forth with a timing belt.

Detects when the slider reaches the front end. After ink drop

detection process, the motor rotates in reverse to perform wiping.

Detects the home position of the slider.

Supplies high voltage to the electrode and detects the change in

electrical charge.