Printing Method - Epson 440 Service Manual

EPSON Stylus Color 600
2.1.1.1.2

Printing Method

This section explains printing method of actual printing such as printing text at various resolution
select/printing mode and graphics printing. In order to prevent white or color banding which are peculiar
problem of ink-jet, new Micro-Weave functions are added to the previous Micro-Weave function. The
number of nozzles and printing mode according to the selected resolution are used separately by a user.
The table below shows relation between selected resolution and printing mode.
1)
2)
3)
Vertical Printing
direction mode
[dpi]
360 FOL M/W
M/W
720 FOL M/W
POL M/W
Note1: M/W means Micro-Weave.
Note2: FOL means Full Overlap Micro-Weave.
Note3: POL means Part line Overlap Micro- Weave .
Note4: Forward Overlap-Nozzle and backward Overlap -Nozzle are described in the [1.Full Overlap
Mirco-Weave] and [2.Part line Overlap Micro-Weave] below.
Following explains operation outlines of new Micro-Weave functions listed above.
[1. Full Overlap Micro-Weave]
In order to print one line at horizontal direction, this printing method is designed to complete a printing
pattern by two-pass carriage operation with two different types of dot. When this two different types of dot
pass one same line twice, it does not print the same dot twice.

The nozzles whose configuration completely match to the black and CMY nozzle are used.
(Usually Micro-Weave type)

Therefore, all nozzles in case of CMY nozzle and #1•`#63 nozzles in the B2 line in case of
black head are its objects. (B1 line is not used at Micro-Weave. Refer to figure1-1 for detail of
nozzle configuration.)

Out of these 4 color nozzle objects, the number of all nozzles which are going to be used are
divided equally into 2 groups.

Paper feeding will be done as many as each number of nozzles which are divided into two
groups and the same number of dots.(for example, if there are two 10-nozzle groups during
360-dpi printing at longitudinal direction, paper feeding of 10/360-inch becomes available.)
At this time, two groups perform Micro-Weave individually and particular lines are passed by
two different nozzles.
Note1) These nozzles which are divided into two groups must be set and divided in order to
be a pair of odd and even number.
2-4
Full Overlap Micro-Weave
Part Line Overlap Micro-Weave
Micro-Weave: (same as previous control)
Table 2-1. Resolution and Printing mode
Paper feed
pitch
[inch]
15/360
31/360
15/720
29/720
Forward Non
Overlap- Overlap-
Nozzle Nozzle
#16•`#30 ---
---
#1•`#31
#16•`#30 ---
#30•`#32 #4•`#29
Backward Not used
Overlap- Nozzle
Nozzle
#1•`#15 #31•`#32
--- #32
#1•`#15 #31•`#32
---
#1•`#3
Rev. A