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  1. #1
    Trusted Tech 50+ Posts
    Any better way for Gradation Adjustment

    denvertan's Avatar
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    Any better way for Gradation Adjustment

    This is my first attempt to perform gradation adjustment in CE mode. Many things I am still learning but this few things caught my attention today.
    I have followed the Service Manual as close as I can without missing a step.

    1. All zeros in FEET during "Print". Does this normal ?
    258870754.jpg

    2. Any formula for me to adjust the conv value ? Because now I am trying it with what service manual say 0.03 in density. (What does this 0.03 density really about. I googled but the information are not that help.

    880545872.jpg

    3. At first attempt for Auto Gradation, my PRINT get a very close colour match with the sample from a larger production machine.
    But following a few Gradation adjustment (event after I have do Stabilization + Initial Data) the colour never come back. Now I am always overtone.
    649330597.jpg
    Left = first gradation printout, right = overtone printout, center = original

    Any expert comment and help is much appreciated !!!

    Meter: all less than 250k
    Developer, Drum (compatible) is new.

  2. #2
    Service Manager 1,000+ Posts tsbservice's Avatar
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    Re: Any better way for Gradation Adjustment

    You can always try to lower toner density a few steps in SM.
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

  3. #3
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    Any better way for Gradation Adjustment

    denvertan's Avatar
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    Re: Any better way for Gradation Adjustment

    Set the M, K, Y to "-10" still produce overtone like 5% better maybe .

  4. #4
    Field Supervisor 500+ Posts Bix's Avatar
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    Re: Any better way for Gradation Adjustment

    Hi, when you initialize the gradation values, the MFP sets the perfection value: 0


    The value 0, however, is almost impossible, even on an MFP just out of the carton. At the first graduation, you'll get values that must be in the +/- 100 range to be considered good.To better understand your problem, you tell us the model of the MFP, the status of the consumables and whether you are using OEM parts

  5. #5
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    Any better way for Gradation Adjustment

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    Re: Any better way for Gradation Adjustment

    Quote Originally Posted by Bix View Post
    Hi, when you initialize the gradation values, the MFP sets the perfection value: 0


    The value 0, however, is almost impossible, even on an MFP just out of the carton. At the first graduation, you'll get values that must be in the +/- 100 range to be considered good.To better understand your problem, you tell us the model of the MFP, the status of the consumables and whether you are using OEM parts
    Model is KM C364e
    All Consumable is at level 100% besides transfer belt at around 40%

    My issue is the machine now is overtone cannot even tune down.
    And at CE Mode Gradation Machine have a "FEET" at PRINT is all ZEROs. (Restarted it many time still zeros)
    While my other KM 4 series all have some value there, so I suspect some sensor is faulty.

    And this machine also have this issue. colour flakes at printing. (I try adjusted the Heater Temperature from level 1, to 4 all still produce 1st page with colour flakes)
    1726078469.jpg

  6. #6
    Field Supervisor 500+ Posts Bix's Avatar
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    Re: Any better way for Gradation Adjustment

    I believe the drums have ended their lives. When replacing the color drums, it is recommended to change them together.
    At 250k they almost did a second cycle. At 300k you should change the transfer belt.


    Those marks seem to come from the fuser, perhaps some toner has remained attached. Try opening the fuser door and see if the fuser roller is dirty.

  7. #7
    Service Manager 2,500+ Posts
    Any better way for Gradation Adjustment

    copier tech's Avatar
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    Re: Any better way for Gradation Adjustment

    Quote Originally Posted by denvertan View Post
    Model is KM C364e
    All Consumable is at level 100% besides transfer belt at around 40%

    My issue is the machine now is overtone cannot even tune down.
    And at CE Mode Gradation Machine have a "FEET" at PRINT is all ZEROs. (Restarted it many time still zeros)
    While my other KM 4 series all have some value there, so I suspect some sensor is faulty.

    And this machine also have this issue. colour flakes at printing. (I try adjusted the Heater Temperature from level 1, to 4 all still produce 1st page with colour flakes)
    1726078469.jpg
    Compatible toner?

    Let us eat, drink, and be merry, because tomorrow we may die!

    www.copierfirmware.co.uk

  8. #8
    Service Manager 1,000+ Posts tsbservice's Avatar
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    Re: Any better way for Gradation Adjustment

    Quote Originally Posted by denvertan View Post
    Set the M, K, Y to "-10" still produce overtone like 5% better maybe .
    What do you mean by "-10" ? Setting range is -3 to +3.
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

  9. #9
    Trusted Tech 50+ Posts
    Any better way for Gradation Adjustment

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    Re: Any better way for Gradation Adjustment

    Quote Originally Posted by copier tech View Post
    Compatible toner?

    It original, it start to happen with I changed the [Heater Level Control] from level 3 to 4 due to a electric sound from the right panel.


    Quote Originally Posted by tsbservice View Post
    What do you mean by "-10" ? Setting range is -3 to +3.
    I adjusted the [Max Image Density Adj] the value available is from -10 to +10.
    Am I adjusted the wrong parameter ?

  10. #10
    Service Manager 1,000+ Posts tsbservice's Avatar
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    Re: Any better way for Gradation Adjustment

    Do TCR Level Setting in steps, first -1, then maybe -2 or -3, but you have to run some pages between machine decreases toner concentration.
    A tree is known by its fruit, a man by his deeds. A good deed is never lost, he who sows courtesy, reaps friendship, and he who plants kindness gathers love.

    Blessed are they who can laugh at themselves, for they shall never cease to be amused.

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