2. Assignment # 4

4. Printer is the most popular output device
used today to produce hard copy
output. There are many types of printers
which are used by the users as according
to their need. These are very useful
nowadays as all the things which are
uneasy to read on the monitor screen we
used to print those things and read
carefully.

6. There are many types of printer which are as
follows:-
Dot-Matrix Printers.
Inkjet Printers.
Drum Printer.
Chain Band Printer.
Laser Printer.
Multi Function Printer.

7. It is a character printer that print one character at
a time. This Printer can form characters and all
kinds of images as pattern of dots. Since dot
matrix printer produce printed output as pattern
of dots, they can print any shape of character
that a program can describe. They therefore, can
print many special characters, different sizes of
print, and also have the ability to print graphics
such as charts and graphs. Dot Matrix printer are
normally haves slow printing speeds ranging
from 30-600 characters per second. They are
available at very low cost. These types of
printers are generally used to print the shipping

9.  It prints characters by spraying patterns of ink on the paper from a nozzle or
jet that can heated up selectively. The ink comes out of the nozzle in a form of
vapors. After passing through a reflecting plate, it forms the desired
letter/shape at the desired place. It is also a Character printer but it produces
high quality output than dot matrix printers because these printers form
characters with very tiny ink dots. Inkjet printers are slower than dot matrix
printer as inkjet printing speed is 40- 300 characters per second. Inkjet
printer is also more expensive than dot matrix because it produces the high
quality prints with more transformed technology. These printers are very
popular because they are less expensive than laser printers and can print
faster and accurate than dot matrix and other impact printers.

11.  Drum printer is a line printers that print one line
at a time. In addition the drum printer is also the
impact printer. In this Printer it has a set
of hammers mounted in front of the drum in a
manner that an inked ribbon and paper can be
placed between the hammers and the drum.
Than the drum rotates at a high speed. A
character is printed at a desired print position.
This printer has the speed of 300- 2000 lines per
minute. This printer also produces lots of noise
that’s why cover is used to reduce the noise.

13.  Chain/Band printer are line printers that prints one
line at a time. It consist of a metallic chain/band on
which all characters of the character set supported by
the printer are embossed. A standard character set may
have 48,64 and 96 characters. The characters in the
character set are embossed several times on the
chain/band. Unlike drum printer the chain/band
printer can be changed easily. It allows the printing to
be done in different fonts and styles in the same
printer. Due to the impact printing chain/band
printers are noisy in operation and often use a cover to
reduce the noise level. Printing speeds of the
chain/band printers range from 400 – 3000 lines per
minute.

15.  Laser printers are the page printers that prints one
page at a time. main component of the laser printer are a
laser beam source, multi sided mirror, a photoconductive
drum, and toner. Laser printers produces high quality
output because they form characters by very tiny ink
particles. The high end laser printer can have a
resolution of 1200 dpi. Due to the high resolution , these
printers give excellent graphics art quality. Laser
printers are faster than other printers discussed
earlier. Low speed laser printers can print 4 to 12 pages
per minute. Owing to their better print quality and
printing speed, laser printers are more expensive than
the other types of the printers. These printers are very
popular in the market because of its fast printing.

17.  Multi Function Printers are also commonly known as all-in-one
printers. With this type of device, your printing,
scanning, faxing and photocopying needs are covered!
These printers usually come in a variety of sizes with many
being small enough to fit onto a small desk.
 Aside from the multi function features that MFPs have, these are the
common benefits that business owners can gain from this type of
printer.
1. They take up less room.
2. They are usually lower in cost. Though it may seem expensive compared to the other
types of printers, if you consider buying a fax machine, scanner, photocopier and a
printer, you’ll find that buying an MFP is actually a lot more affordable.

19. 3D printing or additive manufacturing is a process of
making three dimensional solid objects from a digital file.
The creation of a 3D printed object is achieved using
additive processes. In an additive process an object is created
by laying down successive layers of material until the entire
object is created. Each of these layers can be seen as a thinly
sliced horizontal cross-section of the eventual object.

20.  It all starts with making a virtual design of the object you
want to create. This virtual design is made in a CAD
(Computer Aided Design) file using a 3D modeling program
(for the creation of a totally new object) or with the use
of a 3D scanner (to copy an existing object). This scanner
makes a 3D digital copy of an object and puts it into a 3D
modeling program.
 To prepare the digital file created in a 3D modeling
program for printing, the software slices the final model
into hundreds or thousands of horizontal layers. When this
prepared file is uploaded in the 3D printer, the printer
creates the object layer by layer. The 3D printer reads
every slice (or 2D image) and proceeds to create the
object blending each layer together with no sign of the
layering visible, resulting in one three dimensional object.

22. Printers are used
Widely across the
world.
Printers are Now
their in every prize.
Printers are very useful
in many fields of life like
Education, Business,
Companies, Shops.
Printers are
Improved very
much in quality.