3070L prints skewed

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  • nullskull
    Learning

    250+ Posts
    • Aug 2023
    • 395

    #1

    3070L prints skewed

    I have a 3070L that is consistently printing skewed in one direction. Nothing unsalvageable but I was wondering if there is a setting that can be adjusted to remove it. Or is this more likely a technical problem?
  • blackcat4866
    Master Of The Obvious

    Site Contributor
    10,000+ Posts
    • Jul 2007
    • 22946

    #2
    If you'd like a serious answer to your request:
    1) demonstrate that you've read the manual
    2) demonstrate that you made some attempt to fix it.
    3) if you're going to ask about jams include the jam code.
    4) if you're going to ask about an error code include the error code.
    5) You are the person onsite. Only you can make observations.

    blackcat: Master Of The Obvious =^..^=

    Comment

    • wjurls
      Trusted Tech

      Site Contributor
      250+ Posts
      • Feb 2017
      • 492

      #3
      Re: 3070L prints skewed

      Was work done to the registration section by chance prior to the skew starting? I had an issue once where after removing and cleaning the registration section I got consistent skews. After hours of aggravation, I finally noticed that I had put the top plate (the one that holds the metal registration roller cleaning mylar) on backwards. That was all it took to cause a skew nightmare. I have done this work numerous times in the past and this was the first time I did that. Didn't even know it was possible.

      Comment

      • nullskull
        Learning

        250+ Posts
        • Aug 2023
        • 395

        #4
        Re: 3070L prints skewed

        Oh boy yeah this seems like an issue. Ok so I have heard from the people who use it most that the bypass tray does not work very well but the problem also shows up in the other trays. I am not very familiar with the term NCR media. Is that just thicker coated paper?
        Last edited by nullskull; 10-23-2023, 06:08 PM.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22946

          #5
          Re: 3070L prints skewed

          Originally posted by nullskull
          Oh boy yeah this seems like an issue. Ok so I have heard from the people who use it most that the bypass tray does not work very well but the problem also shows up in the other trays. I am not very familiar with the term NCR media. Is that just thicker coated paper?
          No, sadly heavier coated paper might be more manageable.

          NCR: No Carbon Required is 16# (thin paper), with a waxy pressure sensitive coating. If you haven't heard of it ... well I'm jealous. The waxy coating covers ... well everything. Amazingly, the vacuum feed units seem to feed it adequately, but the waxy coating covers the inside and outside of the belts. It coats all the rubber rollers. The waxy coating is absorbed into the rubber rollers causing them to swell in the middle, making the paper skew and jam. On endusers using a high percentage of NCR the registration rollers rarely make 800K. At 5M we tore down the vacuum feed paper decks and replaced everything rubber.
          =^..^=
          If you'd like a serious answer to your request:
          1) demonstrate that you've read the manual
          2) demonstrate that you made some attempt to fix it.
          3) if you're going to ask about jams include the jam code.
          4) if you're going to ask about an error code include the error code.
          5) You are the person onsite. Only you can make observations.

          blackcat: Master Of The Obvious =^..^=

          Comment

          • nullskull
            Learning

            250+ Posts
            • Aug 2023
            • 395

            #6
            Re: 3070L prints skewed

            Originally posted by blackcat4866
            No, sadly heavier coated paper might be more manageable.

            NCR: No Carbon Required is 16# (thin paper), with a waxy pressure sensitive coating. If you haven't heard of it ... well I'm jealous. The waxy coating covers ... well everything. Amazingly, the vacuum feed units seem to feed it adequately, but the waxy coating covers the inside and outside of the belts. It coats all the rubber rollers. The waxy coating is absorbed into the rubber rollers causing them to swell in the middle, making the paper skew and jam. On endusers using a high percentage of NCR the registration rollers rarely make 800K. At 5M we tore down the vacuum feed paper decks and replaced everything rubber.
            =^..^=

            Ok I see yes we use the carbonless paper here but mainly in our 7000. All the same I'll have a look at the registration roller in the 3070L. Would cleaning the rollers with rubber rejuvenator help with this? Or does it not do much?

            Comment

            • blackcat4866
              Master Of The Obvious

              Site Contributor
              10,000+ Posts
              • Jul 2007
              • 22946

              #7
              Re: 3070L prints skewed

              Originally posted by nullskull
              Ok I see yes we use the carbonless paper here but mainly in our 7000. All the same I'll have a look at the registration roller in the 3070L. Would cleaning the rollers with rubber rejuvenator help with this? Or does it not do much?
              Rubber Rejuvenator will help a lot if your rollers are dirty, contaminated, and straight. It's a great first step in diagnosis.

              If the rollers are swollen due to NCR coating, cleaner won't help. Bring a metal straight edge, or set the registration roller on the glass. If you can nudge the corner of a piece of paper between the registration roller and the glass, cleaning won't help.

              Another way to check the registration roller circumference is to cut a bunch of 3/16" wide strips of paper. At various points along the registration roller, roll the paper strip through, wrap it around and make a mark. Then compare the circumference values along the length of the roller. If the strips of paper pull right out without resistance, that's a bad sign. With this method you do not have to remove the rollers to check circumference.
              =^..^=
              Last edited by blackcat4866; 10-24-2023, 12:06 AM.
              If you'd like a serious answer to your request:
              1) demonstrate that you've read the manual
              2) demonstrate that you made some attempt to fix it.
              3) if you're going to ask about jams include the jam code.
              4) if you're going to ask about an error code include the error code.
              5) You are the person onsite. Only you can make observations.

              blackcat: Master Of The Obvious =^..^=

              Comment

              • nullskull
                Learning

                250+ Posts
                • Aug 2023
                • 395

                #8
                Re: 3070L prints skewed

                Originally posted by blackcat4866
                Rubber Rejuvenator will help a lot if your rollers are dirty, contaminated, and straight. It's a great first step in diagnosis.

                If the rollers are swollen due to NCR coating, cleaner won't help. Bring a metal straight edge, or set the registration roller on the glass. If you can nudge the corner of a piece of paper between the registration roller and the glass, cleaning won't help.

                Another way to check the registration roller circumference is to cut a bunch of 3/16" wide strips of paper. At various points along the registration roller, roll the paper strip through, wrap it around and make a mark. Then compare the circumference values along the length of the roller. If the strips of paper pull right out without resistance, that's a bad sign. With this method you do not have to remove the rollers to check circumference.
                =^..^=

                Is it safe to open the registration section? I noticed some screws with red paint on them which I know indicates its better not to touch.

                Comment

                • blackcat4866
                  Master Of The Obvious

                  Site Contributor
                  10,000+ Posts
                  • Jul 2007
                  • 22946

                  #9
                  Re: 3070L prints skewed

                  If you remove the painted screws you will have to re-align the registration assembly. If possible it's better not to touch the painted screws. Sometimes it's unavoidable. =^..^=
                  If you'd like a serious answer to your request:
                  1) demonstrate that you've read the manual
                  2) demonstrate that you made some attempt to fix it.
                  3) if you're going to ask about jams include the jam code.
                  4) if you're going to ask about an error code include the error code.
                  5) You are the person onsite. Only you can make observations.

                  blackcat: Master Of The Obvious =^..^=

                  Comment

                  • nullskull
                    Learning

                    250+ Posts
                    • Aug 2023
                    • 395

                    #10
                    Re: 3070L prints skewed

                    Originally posted by blackcat4866
                    If you remove the painted screws you will have to re-align the registration assembly. If possible it's better not to touch the painted screws. Sometimes it's unavoidable. =^..^=
                    ok well I'll leave it to the technician then

                    Comment

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