Basics of Printer’s

·        Printer
-        A printer is a type of device that accepts text and graphic output from a computer and transfer the information to paper .
-        Mainly there are two types of printer. i.e Impact Printer and Non-Impact Printer.

        Types of Printers

ü  Impact Printer

-        Impact Printer are those type of printer which print material on paper by striking o to the paper with the help of carbon ribbon with impact on hammer or printing pins.
-        These are less expensive and print material is not very good.
-        These types of  printers will makes some noise.
-        Example : - Daisy wheel, DMP (Dot Matrix Printer).

ü  Non-Impact Printer
-        A Non-Impact Printing is done with the help of laser and ink .
-        The print quality is to good as compare to impact printers.
-        These are is very expensive as compare to impact printer.
-        These types of printer will not make noise.
-        Example :- Inkjet, Thermal, Laser.

ü  Chain Printer
-        It is also know as serial printer.
-        Character printer are those printer which will print one character at a time.
-        It’s printing speed is very slow.
-        Example :- DMP (Dot Matrix Printer).

ü  Line Printer
-        Line Printer are those printer which will print one line at a time.
-        the speed of this printer is fast as compare to character printer.
-        Example :- Drum Printer.

ü  Page Printer
-        Page printer are those printer which print document of whole page at a time.
-        The print quality of this printer is very Good.
-        It also very expensive.

*       DMP
-        It also Know as Dot Matrix Printer.
-        Dot Matrix printer is a character printer which print one character at a time with the help of print head.
-        Print head moves horizontally from left to right and print the character. Now days DMP works from both side i.e left to right and right to left.
-        Print head activate the corresponding pins of specific character and hammer it on to the carbon paper so that it will print character on blank paper.
-        It’s print character like dot which print quality is not very good.
-        It is not very expensive.
-        It print 30 to 600 characters per second depending on the quality of DMP.
-        It prints characters with the help of hammering of pins and it creates noises so it is an Impact Printer.
                                                        DMP characters like this 

*       Drum Printer
-        Drum Printer is an example of line printer, because it prints one line at a time.
-        Dm printer is cylindrical in shape and it consist one character in whole line so, that one character in whole line so that one line contain 132 same character and total number of line in this printer is 96. So, that number of character on drum is equal to 132*96 = 12672 characters.
-        Drum Printer consist of a ribbon which is near by the drum than printing paper/normal paper is adjust after ribbon and hammer is over the paper.
-        The hammer is activated according to what we want print on a single line, one line is printed after one rotation od whole drum.
-        It also prints characters with the help of hammering of pins and it creates noises so it is an Impact Printer.
-        Print quality of this printer is better as compare to DMP.
-        It can print only those character’s which is embossed only on drum. So, this is disadvantage of drum printer as compare to DMP.


*       Chain Printer
-        Chain Printer is also known as Band Printer.
-        It print one character at a time so, it is called line printer.
-        Chain Printer works with the help od metallic chain or band which revolve and print concern characters by hammering on to the carbon paper and blank paper is placed between metallic chain and carbon.
-        Total set of hammer in this printer is 132.
-        It has three types of character set i.e, 48, 64 and 96. So, that if once character set us present four time one to the metallic rod.
-        It’s print mechanism is so fast as compare to Drum Printer and DMP.
-        Unlike Drum Printer it is easy to remove metallic chain from chain printer and replace by another chain. So, that different types of font & style we can print with the help of chain printer.
-        It will print about 400 to 3000 line per minute.
-        The print quality of this printer s much better than DMP.
-        It prints characters with the help of hammering of pins and it creates noises so it is an Impact Printer.

*       Daisy Wheel Printer

-        Daisy Wheel Printer is mad by David S.Lec in 1969.
-        It is called Daisy Wheel Printer  because it looks like petal of Daisy flower.
-        It is made up of plastic or metal.
-        The wheel of Daisy Wheel Printer rotates and print the specific character by hammering on the carbon ribbon and it prints the character on a plane paper.
-        It is an example of Impact Printer because during printing the characters it also makes sound.
-        It’s print quality is poor and its speed is also very slow.
-        It can pint 10 to 75 characters per second.
-        If we want to print different font then we have to change the wheel of DWP.



*       Laser Printer
-        Laser Printer is a printer which works on Laser Beam.
-        The main component of laser printer are laser beam source, photoinductive drum, multi-sided mirror and toner.
-        Laser Beam emitted from its source and with the help of multisided mirror it focus the laser beam to photo-conductive drum and make patches on the photo-conductive drum toner which is opposite charge particle then photo-conductive drum strikes the toner so, that by the heat and pressure it will print the pages.
-        Low quality laser printer has 600 dot per inches (i.e. DPI), Where as high quality laser printer has 120 DPI.
-        It is a Non-Impact Printer and it’s print quality is to much better as compare to another printers.
-        Low quality laser printer can print 4 to 12 pages per minute where as high quality laser printer can print 500 to 1000 pages per minute. So, it can print a book within a minute.
-        It can print text, pictures as well as graph.
  


*       Thermal Printer
-        It uses Thermochromic paper or Thermal paper.
-        It is Non-Impact Printer.
-        It can print black as well as Red color output.
-        It consist of three main things
-        Thermal head :- It uses pins to apply heat and pressures.
-        Platen :- It is a round case where thermal paper exist.
-        Spring :- It is use to apply pressure to thermal printer.
-        Printer apply electric current to the heating element of thermal head which generate heat.
-        Thermal paper is placed between thermal head and platen, then spring tells the thermal head to apply pressure. So, that a pattern will print on to the thermal paper with the help of heat and pressure.