Epson 2090 - LQ B/W Dot-matrix Printer Технический обзор - Страница 7
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Technical Brief—Multimedia projectors
Reliability—Total Print Volume vs. Mean Time Between Failures
EPSON impact printers are more accurately rated for reliability in Total Print Volume, and are also rated in
Mean Time Between Failures.
Total Print Volume estimates the total number of lines that the printer can print before it may fail.
Mean Time Between Failures estimates the number of hours between failures at 25 percent usage
and 35 percent density, which can vary depending on printing conditions, and is much less
accurate than Total Print Volume.
Reliability—Off-carriage motor assembly
Most EPSON impact printers use an off-carriage motor assembly, versus the on-carriage motor used in
competitive printers.
The off-carriage motor allows the print head to reach top speed more quickly and stop more
quickly because it is not carrying the extra motor weight.
Because just the print head moves, there is less wear and tear on the motor for greater overall
reliability.
EPSON Sales Training
Off-carriage motor
EPSON is a registered trademark of Seiko Epson Corporation.
Other trademarks are the property of their respective owners.
On-carriage motor
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