The Magnetic Roller's Role in Laser Printer Image Development

Photo by amberman

What is common to both toner cartridges and solar panels? Both require energy to carry out its respective operations and work efficiently. Solar panels need sunshine to store electrical energy into its storage batteries while cartridge units run on electrical energy to sustain the supply of DC voltage bias to its magnetic rollers. In the absence of solar energy, the solar panels will not be able to convey electrical energy into its batteries resulting to insufficient power supply in line with the underutilized energy storage bins. Meanwhile, the toner cartridge will not be able to supply adequate toner powder to form the raster graphic image and bond its particles on the media, to cause uneven toner delivery and consequent defects over printouts. 

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Dots Per Inch (DPI) Resolution: The True Measure of Print Quality

Photo by shlomaster

DPI resolution. Imagine a laser print on paper that is one square inch in size. Under a resolution size of 1200 DPI x 1200 DPI , the printer’s scanner can accurately pack 1200 dots on a single horizontal row that is 1 inch wide. Depending on how fast paper or media moves, 1200 dots in a single column file (also1 inch in length) can be generated vertically as well. The finished print is sharp, smooth and no longer grainy because of the 1,440,000 (1,200 multiplied by 1,200) dots that comprise the 1 square inch image. Images set with high Dot Per Inch (DPI) resolution differ from a 300 x 300 DPI or a 600 x 600 DPI (lower resolution sizes) image because dots generated are far in between that reduces print intensity, resulting to images that are dull and absurdly grainy. The process of converting images into a raster graphics image composed of dots forms part of the electro-photographic (EP) printing process.

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