Block, SkipCaptcha, Upload, Automoderated users, Check users, delete, edit, Moderators, move, oversight, protect, ratelimit-exempt, rollback, Administrators
20,092
edits
Changes
User:DavidB4/workspace (view source)
Revision as of 17:53, November 18, 2016
, 17:53, November 18, 2016→Methods: saving progress
==Methods==
==Methods==
Throughout the evolution of printing technology, many methods of printer have been invented. The following are some of the more presently or formerly popular varieties.
Throughout the evolution of printing technology, many methods of printer have been invented. The following are some of the more presently or formerly popular varieties.
===Inkjet===
===Inkjet===
===Laser===
Inkjet printers are popular, since they offer several advantages. These include high-quality printing, inexpensive printers, and quiet operation. However, inkjet printers use proprietary ink cartridges, which are usually expensive.
====Care and maintenance====
The main problem these printers experience is clogging of the print heads. They can usually be cleaned fairly easily using [[isopropyl alcohol]]. However ,the printer must be opened up and the print heads removed to do this, and once done, the printer usually must print one or more alignment sheets (which consumes expensive ink). Many Inkjet printers have the print heads on the actual ink cartridges, which means that each time the cartage is replaced, so is the head.
===Laserjet===
This printing method uses a laser to "paint" the desired image onto a photosensitive imaging drum. Toner is then picked up by the drum, and transferred to the paper. Heat an pressure are then applied to the paper to fuse the plastic-based toner to the sheet. Black printer one go through this process once, but color printer must do so four times. There are four photoreceptive drums, one is used for each color--yellow, magenta, cyan, and black. Each drum prints its color onto a belt, then a transfer roller moves the toner to the paper. The printing process is as follows:
#Processing: Construct the page in memory
#Charging: Put an negative electrostatic charge on the imaging drum
#Exposing: Write the image on the drum using laser
#Developing: Add negatively charged toner to the drum (it will be repelled by all areas except those written on by laser)
#Transferring: Place the toner from the drum onto the paper (If printing color, transfer to a belt first, then the paper)
#Fusing: Apply heat an pressure to the page
#Cleaning: Remove excess toner
====Care and maintenance====
Since these printer use powder toner, they tend to get quite dirty over time, and should be cleaned periodically. However, compressed air should not be used in most cases, since the toner may become lodged in more vital areas, and this will generally make a mess of the surrounding area. Cold water on a cloth is usually the best option for cleaning most surfaces, and [[isopropyl alcohol]] cleans the rollers well.
===bubblejet===
===bubblejet===
===Dot Matrix===
===Dot Matrix===