24 Pin Vs 9 Pin Dot Matrix Printer

Dot matrix printing,
^[one]

sometimes called
impact matrix printing, is a
computer printing
process in which ink is applied to a surface using a relatively low-resolution
dot matrix
for layout. Dot matrix printers typically apply a print head that moves back and forth or in an up-and-down motility on the folio and prints by impact, striking an ink-soaked textile ribbon against the paper, much like the print mechanism on a
typewriter
or
line printer. Still, a dot matrix printer is able to print arbitrary patterns and not merely specific characters.

The perceived quality of dot matrix printers depends on the vertical and horizontal resolution and the ability of the printer to overlap adjacent dots. nine-pivot and 24-pivot are common; this specifies the number of pins in a specific vertically aligned infinite. With 24-pin printers, the horizontal motion can slightly overlap dots, producing visually superior output (
near letter quality

or
NLQ), unremarkably at the toll of speed.

Dot matrix printing is typically distinguished from non-touch methods, such equally
inkjet,
thermal, or
laser printing, though they too may use a
bitmap
to represent the printed work. Information technology is also able to utilize endless printing using
continuous paper
fanfolded with perforations for each page to exist hands torn from each other.

History

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In 1925,
Rudolf Hell
invented the
Hellschreiber, an early on
facsimile-like
dot matrix-based
teletypewriter
device,
^[2]

patented in 1929.

Betwixt 1952 and 1954
Fritz Karl Preikschat
filed five patent applications
<sup>[3]


[iv]


[5]</sup>

for his
teletype author vii stylus 35 dot matrix
aka
PKT printer,
^[2]

a dot matrix teletypewriter built between 1954 and 1956 in Frg.
^[5]

Like the earlier Hellschreiber, it even so used electromechanical means of coding and decoding, but information technology used a beginning-cease method (asynchronous transmission) rather than
synchronous transmission
for communication.
^[2]

In 1956, while he was employed at
Telefonbau und Normalzeit GmbH
(TuN, after called
Tenovis), the device was introduced to the
Deutsche Bundespost
(German Post Office), which did not show interest. When Preikschat emigrated into the US in 1957 he sold the rights to use the applications in any countries (except for the Us) to TuN.
^[5]

The paradigm was as well shown to
General Mills
in 1957.
^[6]

An improved
transistorized
design
^[2]

became the basis for a portable dot matrix facsimile machine, which was prototyped and evaluated for military use by
Boeing
around 1966–1967.
<sup>[7]


[8]</sup>

IBM
marketed its showtime dot matrix printer in 1957, the aforementioned year that the
dye-sublimation printer
entered the market.
<sup>[9]


[10]</sup>

In 1968, the Japanese manufacturer
OKI
introduced its first series impact dot matrix printer (SIDM), the

OKI Wiredot
. The printer supported a
character generator
for 128 characters with a impress matrix of 7×five. It was aimed at governmental, fiscal, scientific and educational markets. For this achievement, OKI received an accolade from the
Data Processing Society of Japan
(IPSJ) in 2013.
<sup>[xi]


[12]


[13]</sup>

In 1970
Digital Equipment Corporation
(DEC) introduced an impact
dot matrix printer, the
LA30, as did
Centronics
(and then of
Hudson,
New Hampshire): the Centronics 101.
^[xiv]

The search for a reliable printer mechanism led it to develop a relationship with
Brother Industries, Ltd
of
Japan, and the sale of Centronics-badged Brother printer mechanisms equipped with a Centronics print head and Centronics electronics. Different Digital, Centronics full-bodied on the depression-end
line printer
marketplace with their distinctive units. In the process, they designed the
parallel electrical interface
that was to go standard on most printers until it began to be replaced by the
Universal Serial Bus
(USB) in the belatedly 1990s. The Apple
ImageWriter
was a popular consumer dot matrix printer in the 1980s until the mid 1990s.

In the 1970s and 1980s, dot matrix printers were generally considered the best combination of expense and versatility, and until the 1990s they were by far the most common form of printer used with
personal
and
dwelling house computers.

Design

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Dot matrix printing uses a print caput that moves dorsum-and-forth, or in an up-and-downwards movement, on the page and prints by bear on, striking an ink-soaked cloth ribbon against the newspaper, much like the print mechanism on a
typewriter. Withal, unlike a typewriter or
daisy wheel printer, letters are drawn out of a
dot matrix, and thus, varied fonts and arbitrary graphics can be produced.

Each dot is produced by a tiny metal rod, besides called a “wire” or “pivot”, which is driven forrad by the ability of a tiny
electromagnet
or
solenoid, either directly or through small-scale levers (pawls).
^[15]

Facing the ribbon and the newspaper is a pocket-size guide plate named ribbon mask holder or protector, sometimes also chosen
butterfly
for its typical shape. It is pierced with holes to serve as guides for the pins. The plate may be made of hard plastic or an artificial jewel such as
sapphire
or
ruby-red.

The portion of the printer that contains the pivot is chosen the print head. When running the printer, it generally prints i line of text at a fourth dimension. The printer caput is attached to a metal bar that ensures right alignment, but horizontal positioning is controlled by a ring that attaches to
sprockets
on two wheels at each side which is then driven with an electric motor.
^[16]

This ring may be made of stainless steel, phosphor bronze or beryllium copper alloys, nylon or diverse synthetic materials with a twisted nylon core to prevent stretching. Actual position can be found out either by dead count using a
stepper motor,
rotary encoder
attached to one cycle or a transparent plastic band with markings that is read by an optical sensor on the printer head (common on
inkjets).

Because the printing involves mechanical pressure level, dot matrix printers can create
carbon copies
and
carbonless copies.
^[17]

Although nearly all
inkjet,
thermal, and
laser printers
besides print closely spaced dots rather than continuous lines or characters, it is not customary to phone call them
dot matrix printers.
^[15]

Dot matrix printers have one of the lowest printing costs per page.

They are able to use fanfold
continuous paper
with tractor holes.

Dot matrix printers create noise when the pins or typeface strike the ribbon to the paper,
^[18]

and audio-damping enclosures may take to be used in tranquillity environments.

They can merely print lower-resolution graphics, with limited color performance, limited quality, and lower speeds compared to not-bear on printers.
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[xx]


[21]</sup>

Variations

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The common
serial dot matrix printers
employ a horizontally moving print head.
^[22]

The impress caput can be thought of featuring a single vertical cavalcade of 7 or more pins approximately the tiptop of a graphic symbol box. In reality, the pins are bundled in up to four vertically or/and horizontally slightly displaced columns in lodge to increment the dot density and print speed through interleaving without causing the pins to jam. Thereby, up to 48 pins
^[23]

tin be used to form the characters of a line while the print head moves horizontally. The press speed of serial dot matrix printers with moving heads varies from 30
^[24]

to 1550
cps.
^[25]

In a considerably different configuration, and so called
line dot matrix printers

^[26]

use a stock-still print caput almost as wide every bit the paper path utilizing a horizontal line of thousands of pins for printing. Sometimes two horizontally slightly displaced rows are used to improve the effective dot density through interleaving. While still line-oriented, these printers for the professional heavy-duty marketplace effectively print a whole line at in one case while the paper moves forward below the impress caput. Line matrix printers are capable of press much more than 1000 cps, resulting in a throughput of up to 800 pages/hour.

A variation on the dot matrix printer was the
cross hammer dot printer, patented by Seikosha in 1982.
^[27]

The smooth cylindrical roller of a conventional printer was replaced by a spinning, fluted cylinder. The print head was a elementary hammer, with a vertical projecting border, operated past an electromagnet. Where the vertical border of the hammer intersected the horizontal flute of the cylinder, compressing the paper and ribbon betwixt them, a single dot was marked on the paper. Characters were built upwards of multiple dots.

See also

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• Daisy bike press
• Dye-sublimation printer
• IBM Proprinter
• Typeball printer
• ESC/P

References

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]

External links

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]

• Flatbed Dot Matrix Printers
  Archived
  2021-08-27 at the
  Wayback Auto
• Printek
• Erwin Tomash’s
  The U.S. Computer Printer Industry