Printing Method - Epson Stylus Photo Service Manual

EPSON Stylus Photo

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) Full Overlap Micro-Weave
2) Part Line Overlap Micro-Weave
3) Micro-Weave: (same as previous control)
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 these two different types of
dot pass one same line twice, it does not print the same dot twice. Following explains the outline of this
movement.

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) Two groups which are divided according to each elements will be divided either even dot or
odd dot when particular lines(level direction line) are formed and eventually, these lines will be
completed at selected resolution. Following is a conceptual figure when full overlap micro-
weave forms a particular line.
2-4
Table 2-1. Resolution and Printing Mode
Paper feed Forward
pitch Overlap-
[inch] Nozzle
15/360 #16•`#30
31/360 ---
15/720 #16•`#30
29/720 #30•`#32
Figure 2-5. Full Overlap Micro-Weave
Non Backward
Overlap- Overlap-
Nozzle Nozzle
--- #1•`#15
#1•`#31 ---
--- #1•`#15
#4•`#29 #1•`#3
Not used
Nozzle
#31, #32
#32
#31, #32
---
Rev. A