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3) The carriage continues moving in
backward direction, wiping the Y head, M
head, C head and Bk head.
4) After wiping the Bk head, the wiper
solenoid is turned OFF and the wiper is
lowered.
5) The carriage is moved onto the purge unit
and carries out the maintenance jet to the
caps.
REFERENCE
When the drive frequency is 14.4kHz,
only the Bk head is wiped.
CHAPTER 2. BASIC OPERATION
c. Timing
Wiping is conducted under the following
conditions.
[1] Before printing
Before the printing process is started, the
wiping is carried out once.
[2] After the suction operations
After completion of suction, the caps are
released and wiping is carried out once.
[3] Dot count wiping
The number of dots of ink discharged
from each head since the start of printing
is counted. When the count for a certain
head exceeds the specified value, the
head is wiped after the current printing of
a band is completed. The count value is
cleared to 0 when printing is started and
after wiping.
3. Maintenance jet
a. Outline
Pre-discharge refers to discharging ink
onto the cap for the purpose of removing ink
which has dried and thickened in the nozzles,
preventing the mixing of ink at the head after
wiping, or adjusting the condition of the
nozzles before starting to print. Maintenance
jet uses large dots.
2–53
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