At this time, we will talk about Principles and How Photocopy Machines Work.
Principles and How Photocopy Machines Work
the basic principle of all photocopiers is xerography. Photocopy machines use light, drums, and toners to copy. These three components are the main components in all photocopy machines. The machine will illuminate the paper placed on the machine’s glass; this light will be captured and reflected by the lens towards the drum. Drums have a negative charge, so that toner powder made from fine iron powder will stick to the toner. Drums exposed to reflection by the lens will lose negative charge so that the toner powder will not stick, while parts that are not exposed to light (pictured) such as writing or images will still have a negative charge.
That way, the toner powder will stick to the shadow of the original document. After the drum has finished pasting all the toner powder needed to print, it is time for the copy paper to come in via the tray sheet to the drum’s bottom. The drum rotates down parallel to the paper surface of the copy. The copy paper has a much stronger magnetic appeal than the machine drum so that all the toner powder falls and sticks to the paper. The last step is to heat while pressing the toner powder on the paper to stick firmly and not bending; that is why the photocopy paper feels hot.
Principles Work of Photocopier : How Photocopiers Work
how it works can be divided into several stages:
1. Firstly, pre-exposure is the first irradiation of the machine
2. Secondly, primary charging is to drain the electric current on the drum so that it makes it negatively charged to attract the toner
3. Thirdly, laser-exposure is irradiation with a laser to get a more apparent shadow quality. At this stage, the original document shadow is captured and reflected by the lens
4. development is the stage where the powder toner begins to be filled and attached to the drum following the reflection shadow
5. transfer is the stage where preparing the paper
6. separation is when the toner powder attached to the drum separates itself and attaches to the paper due to the strong magnetic pull of the paper base.
7. .fixing is the heating stage, and press the toner on the paper to stick firmly.
8. cleaning, as its name suggests, is the stage of cleaning the drum from the remnants of the toner
Photocopy Machine Working Principles
1. the first of Principles Work of Photocopier is Lighting, very bright light produced from exposing lamps that illuminate the document that has been placed on the glass with the position upside down on the glass, will then reflect the image in the document through the lens. Then the lens will direct the image towards the drum tube. Selenium that are very sensitive to light are coating Drum tubes
2. A brighter image on the drum’s surface will cause electrons to appear and neutralize the positive ions produced by the incandescent wire (corona wire) on the top of the drum (wire 1) so that on a bright surface.
3. Powder black ( toner) positively charged that is on the developer, will be attracted by positive ions on the surface of the drum,
4. High voltage DC given on incandescent wire ( corona wire) makes the drum positively charged, incandescent wire ( corona wire) there are two pieces, one is on the drum ( wire 1 ), and under the drum ( wire 2).
5. A piece of paper passed under the drum when the drum rotates. Before the paper reaches the drum first, the paper is made positively charged by wire two so that the toner attached to the paper will be attracted very strongly to the paper because the tensile force of the positive charge on the paper is stronger than the positive charge on the drum plus the gravitational force
6. The machine will miss the next paper through two pressurized hot rollers. The heat of both rollers will exhaust the toner, which will then stick tightly to the paper. This event will produce a copier or copy of the image the same as the original.
7. After the toner goes down to the drum, the paper will continue to spin until passing through the cleaning (cleaning balde) drum cleaner and then through wire 1 (primary corona wire) so that the drum is again positively charged, ready to be re-illuminated continuously over and over again.
That’s all about The Principles and The Work of Photocopier