Epson EPL-N4000 - Develop

EPSON EPL-N4000/EPL-N4000+ Chapter 2 Operating Principles
Rev.B 71
2.4.3 Develop
The toner contained within the EP Cartrid
g
e has a sli
g
ht ma
g
netic
property that causes it to adhere to the Ma
g
netic Roll. The Char
g
e
Meterin
g
Blade (CM Blade) spreads the toner into a very thin layer on
the Ma
g
netic Roll. Friction between the Ma
g
netic Roll and the CM Blade
g
enerates a small electrical char
g
e that is transferred to the toner.
The surface of the Ma
g
netic Roll is made up of a thin sheet of
conductive material. The HVPS supplies the Ma
g
netic Roll with two
volta
g
es; a DC volta
g
e and an AC volta
g
e. The DC volta
g
e is used to
transfer toner from the Ma
g
netic Roll to the surface of the drum. The AC
volta
g
e a
g
itates the toner on the Ma
g
netic Roll, makin
g
toner transfer
easier.
The Ma
g
netic Roll maintains a ne
g
ative DC electrical potential.
Ne
g
ative char
g
ed areas of the drum have a lower electrical potential, or
hi
g
her relative ne
g
ative value than the Ma
g
netic Roll. Dischar
g
ed areas
of the drum have a hi
g
her electrical potential, or lower relative ne
g
ative
value, than the Ma
g
netic Roll. A dischar
g
ed point on the surface of the
drum now appears less ne
g
ative, or positive, in relation to the ne
g
ative
char
g
e on the Ma
g
netic Roll.
The toner adherin
g
to the Ma
g
net Roll is always in contact with the
drum surface. When a less ne
g
ative point on the drum (a dischar
g
ed
area) comes in contact with the more ne
g
ative char
g
ed toner on the
Ma
g
net Roll, toner transfers from the Ma
g
net Roll to that point on the
drum. There is now a visible toner ima
g
e on the drum surface. The
ima
g
e is called a
developed
ima
g
e.
Figure 2-27. Developing
Sr1330xa