Printers are in line units in the first place, ordered either as a cumulative effect that a print head reunion of any kind is in physical contact with the paper, and not effective when there is no mechanical contact with the paper .
impact printers:
matrix printers using a set of needles that can be projected or withdrawn as needed to form a matrix of characters who were fired by a strip-shaped characters on entintadas a sheet of paper behind. Advantages:
software is usually provided by the firmware, the selection of sources and styles of text can be produced and reliable. Disadvantages:
matrix printer tends to be noisy; Crean diffuse, low quality and the characters are not suitable for light, or quality of light volume. Daisy wheel printers, through a metal or plastic wheels with raised letters or characters incorporated into the extreme narrow strip stretching from the centre. The wheel spins to the correct placement of characters in a single hammer strikes, forcing the character through a band entintadas on paper. Advantages:
software is usually provided by the firmware, and is suitable for the quality of light output. They create characters of high quality and suitable for high quality or quantity of light output Disadvantages:
They tend to be noisy, slow and are not able to produce graphics. Barrel (or drum) printers using a rotary canon which contains a set of 32 characters, each with a hammer, which allows each position to print the letter to correct the position through a band entintadas. This mechanism will allow all the characters of the same type that will be printed at the same time. The process is mandatory for all characters needed to build the drum line of text to turn so that the next line can be written. Advantages:
be high quality, high volume (up to 2000 lines per minute). Cons: Only
is capable of producing printed in a font and style and is unable to produce graphics. Chain printers, use a chain rotation that includes one or more sets of characters who turn in front of 132 hammers, which allows each position impact impression of a character through a band entintadas as it passes through the right on the line. This mechanism can potentially a full range to print in one pass. Advantages:
is appropriate for the production of high quality, and a chain of some printers are capable of producing more than one character and / or style. It is capable of very high speed. Disadvantages:
large printers who are independent and are not able to produce graphics. Drum plots; operate by moving a pen on paper to create horizontal movement and the document revolves around a drum past the pen to create vertical movement. This mechanism allows the text to draw images. Advantages:
They are able to produce high quality and can use a leading role (for example, A3). Disadvantages: / They are not adapted to high-volume production. Plane plots; operate move feathers mounted on a truck that moves at a table. The carriage moves to 365 degrees on paper placed on a table under the pen. Advantages:
They are capable of producing high quality (color) and production can provide a leading role (for example, A1 or A3). Disadvantages: They are big
independent printers are not suitable for high-volume production.
not affect the type:
laser using electrostatic charge of a rotating drum inside the printer. A light or laser diode emission and discharge parts of the drum in a sequence of electronic signals that represent images or text that is to build the line at the same time. Trommelen rotation so that the next line can be created. As the drum rotates, makes contact with the accused as plastic powder ink (toner) on these items downloaded. A piece of paper that we have a position higher than the drum is passed through the drum, the transfer of toner. The notes are heated and melted the road. Advantages:
They are capable of producing high quality text and images (color) at a remarkable pace, is ideal for producing high-volume and cost of consumer goods is low. Disadvantages:
They are more complex and more costly than most other types of writing, requires more memory and power. Bubble Jet; using a series of nozzles into the print head through which small drops of ink is sprayed onto the page of a number of dots of ink on the form of images or text on the page. Advantages:
They are capable of producing color text and images of nearly photographic quality. Disadvantages:
They are subject to traffic and consumer spending is very high. Direct thermal printers; employ a number of heated bars incorporated into the print head to take a selective awareness matrix heat Thermograph paper to form images or text. Advantages:
consumables costs are lower than other printing inks is not necessary. They are capable of producing images and text. Disadvantages:
They are not suitable for light, or quality of light volume, and in particular produced the documents that are necessary. Printers thermal transfer, it employs a number of horizontal sections, one for each printing inks bottom band to form a matrix that have been transferred to pater to form images or text. Advantages: They can print labels
very attractive in a wide range of media and the cost is lower than other types of type. Disadvantages:
need special treatment by the paper. Påvirkes temperature changes.
Summary:
of course, if the only criterion for decision-making process reduces the cost of software and speed, drum or chain printers put the draft law. But laser technology and consumer goods are not cheap enough to make this a very cost-effective option, provided there is a need to say more than 10000 pager a year! Everything else requires a more detailed analysis of needs for printing foreign trade software compared to other cost savings and ease of use. I site administrator of the Industrial Museum Wandler, http://www.wandle.org http://www.wandle.org
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