Question about Epson LQ-590 Matrix Printer

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Epson LQ-590 Matrix Printer Paper feed Problem

As soon as the paper touches the sensor the rollers starts reverse feeding that is paper out insted of loading

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  • Anonymous Mar 23, 2014

    does not feed paper correctly, when loading paper on enters part way

  • Anonymous Mar 24, 2014

    I keep getting an error message that the printer is out of paper or that the paper is loaded incorrectly.

  • Anonymous Mar 25, 2014

    Don't feed any kind of paper at all

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  • 150 Answers

Assuming that you are feeding the paper into the correct end of the printer :), it seems that the printer is defective, but

First unplug the printer from the wall, wait a few minutes,
and see if it resets. If that does not work, read on.

  1. Printer rollers (and sometimes head movements as well)
    are controlled by "Stepping Motors"

    Unlike an ordinary DC motor with two wires, that spins
    clockwise or counter clockwise depending on the voltage
    polarity,

    a stepping motor contains several pairs of wires, that
    are pulsed in a controlled sequence, causing the motor
    to spin in precise angular steps. Depending on the
    number of wire pairs (poles) and internal gears, the
    stepping motor can have a resolution as course as
    90 degrees, and as fine as 0.05 degrees per step,
    depending on the cost and applications.

    Linear stepping motors can even move an object in
    a straight line.

    The benefit of these stepping motors is that, unlike a
    linear servo motor, they do not need complex positional
    feed-back for precise control, they simply step as many
    times as you tell them to. Four steps left, two steps back
    .... etc.

  2. These stepping motors are in turn driven by semiconductor switches (transistors) which are
    ultimately controlled by a central processor within the printer.

    Depending on the printer model, and how sophisticated
    the printer's internal processor is, the paper and head
    movements can be either automatically controlled by
    SOFTWARE (firmware) within the printer itself, or by the device drivers installed in Windows.

    The more self-sufficient the printer is, of course, the less
    hassle and CPU overhead on your PC.

  3. When any of the components within this chain of command fail, the stepping motor will move incorrectly:

    a) Skip steps
    b) Get stuck
    c) Oscillate back and forth
    d) Spin backwards.

  4. The causes could be:

    a) One bad wire in the ribbon connecting the motor
    to its controller board.

    b) Bad motor driver transistor: Open or shorted.

    c) Bad data line from the printer's internal control
    processor to the driver transistor array.

    d) Bad processor chip, memory or firmware within
    the printer, e.g. a burned out register or firmware
    memory location.

    e) Defective internal power supply, causing everything
    else to malfunction.

    f) Bad paper position sensor

    d) Crashed control program, which is probably the
    only thing that is fixable:

    i) unplug the printer from the wall socket, wait a
    few minutes, and see if it resets.

  5. It is also remotely (theoretically) possible, that
    the Window drivers are corrupt but this is very unlikely.

  6. If you are fairly brave and want to take the printer apart, and have some electronics knowledge and a few basic instruments, probe the roller drive motor wires, and see what gives. Is one wire stuck consistently low or high ?

    Is one of the motor windings open or shorted ?

    Is one of the driver transistors fried ?

    This very much depends on your level of skill, and the test equipment you have to work with. If you don't have a decent oscilloscope you will not get far. Without a digital multimeter you will not get anywhere at all.
Also do not forget that printers are dirt cheap, less than the ink when it runs out, so this may not be worth your time and effort.

Call the manufacturer, scream blue murder, accuse them of setting your house on fire and giving your dog diarrhea ....

and see if they will send you a freebee.

Hope this explains it.
Please rate my answers.

Martin


Posted on Jul 18, 2008

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Every printer has inside Rollers that help the transportation of the paper during printing.
When the Rollers are faulty then the paper finds it difficult to move successfully during printing.

Also there is a motor that spins to rotate the Rollers.so i think any of these may be faulty.

Try and get a printer specialist to check it for you or you can come live chat with me and i will direct you..

Good luck

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