Pro C901 - Shake marks on 115g or lighter paper

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  • mrwho
    Major Asshole!

    Site Contributor
    2,500+ Posts
    • Apr 2009
    • 4299
    #1

    [CQ] Pro C901 - Shake marks on 115g or lighter paper

    Hello fellas. Long time no see.

    I'm like that jackass friend everyone has who never calls but suddenly pops up when needing help.

    I'm having this problem on a 901, that I can't find out what's causing it.

    12584144_1062000683852752_788737513_n.jpg

    The defect happens after the leading edge enters the fuser but the area afected is not fused yet (the small interval at the left of the paper before the defect matches the distance between the fusing belt and the cooling belt).

    It seems that the paper is being wrinkled just as it enters the fusing unit, but no amount of playing with the entrance guide, fuser nip or fuser speed makes any difference.

    All parts except for the fusing belt are well below PM. I'm about to order the belt, but I'm still not convinced that it's causing this.

    Some more examples:

    1.jpg

    Example just as the paper enters the fusing unit - the left side is fused, the right side is not. No defect to be seen.


    2.jpg

    Example 3/4 into the fusing unit. Defect is visible.


    3.jpg

    Close-up of the secondf example. Notice as the defect happens right after the paper enters the fuser, as if it was being wrinkled.

    Anyone ever got one of these?

    Thank you!
    ' "But the salesman said . . ." The salesman's an asshole!'
    Mascan42

    'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
    Ibid

    I'm just an ex-tech lurking around and spreading disinformation!
    Tags: None
    • slimslob
      Retired

      Site Contributor
      25,000+ Posts
      • May 2013
      • 36866
      #2
      Re: Pro C901 - Shake marks on 115g or lighter paper

      My only thought on paper wrinkling based on paper weight is a problem with the fusing entrance guide. Either dirty, warped or mounted in the wrong position.

        Comment

        • Tonerbomb
          AutoMajical Resolutionist

          Site Contributor
          2,500+ Posts
          • Feb 2005
          • 2589
          #3
          Re: Pro C901 - Shake marks on 115g or lighter paper

          I've not had that on the 901's but mine don't run anything that light. Have you tried using the paper library for a similar paper of that weight???
          Mystic Crystal Revelations

            Comment

            • mrwho
              Major Asshole!

              Site Contributor
              2,500+ Posts
              • Apr 2009
              • 4299
              #4
              Re: Pro C901 - Shake marks on 115g or lighter paper

              Thanks for all the feedback. Problem is apparently solved (testing right now) after replacing these two little buggers.



              Cheers!
              ' "But the salesman said . . ." The salesman's an asshole!'
              Mascan42

              'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
              Ibid

              I'm just an ex-tech lurking around and spreading disinformation!

                Comment

                • pfelgner
                  #5
                  Re: Pro C901 - Shake marks on 115g or lighter paper

                  Originally posted by mrwho
                  Thanks for all the feedback. Problem is apparently solved (testing right now) after replacing these two little buggers.



                  Cheers!

                  We have 2 pro c901's and really haven't seen that problem. All out text weight paper is usually digital paper so the text is long grain to avoid some of that.

                    Comment

                    • mrwho
                      Major Asshole!

                      Site Contributor
                      2,500+ Posts
                      • Apr 2009
                      • 4299
                      #6
                      Re: Pro C901 - Shake marks on 115g or lighter paper

                      This customer doesn't give a shit about grain direction. He cuts the paper in whichever way wastes less paper.
                      ' "But the salesman said . . ." The salesman's an asshole!'
                      Mascan42

                      'You will always find some Eskimo ready to instruct the Congolese on how to cope with heat waves.'
                      Ibid

                      I'm just an ex-tech lurking around and spreading disinformation!

                        Comment

                        • anothertech
                          Service Manager

                          Site Contributor
                          1,000+ Posts
                          • Nov 2007
                          • 1756
                          #7
                          Re: Pro C901 - Shake marks on 115g or lighter paper

                          Originally posted by mrwho
                          This customer doesn't give a shit about grain direction. He cuts the paper in whichever way wastes less paper.
                          That's like saying you don't give a shit about what gas you put in your car, even if you're driving a car that requires 91 octane!

                          You're car will run like shit and know one could make it run any better with that gas!

                            Comment

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