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Thread: C35 skewing

  1. #1
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    C35 skewing

    Any known issue for laser or paper path skewing?

    Device has less than 10k. skew varies between 3 and 8 mm from prints, glass and adf.
    Already replace convey guide from knowledge base

    Thanks in advance!


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    Re: C35 skewing

    Back in the day, before you could do internal prints (analog), we would place a piece of black tape across the primary charge unit. If the void was straight with the paper the cause was optical. If the void was skewed with the paper, then it was a paper skew. Of course, with digital technology that void would now be a black line. It also works by taking a sharpie and making a mark on the slit glass separating the optics from the drum.

    Optical skew or paper skew?

    More specifically does the skew appear on internal prints? If yes it's a paper skew. If no, it's optical.

    Now take it a step further. If optical, is the skew caused by the scanner alignment or the laser alignment. If the scans are skewed, then it's the scanner. If the scans are straight, yet the skew is still optical, the laser is out of alignment.

    Narrow it down a little, then come on back. =^..^=

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    I said skews prints, glass and adf.

    Not really looking for theory just any known issues to avoid shotgun ordering


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    Re: C35 skewing

    I think Cat gave some valuable information to find the cause. Not always there is a simple ready made solution to be picked from a list for every problem.

    If optical, is the skew caused by the scanner alignment or the laser alignment.
    JR2ALTA mentioned that its happening with prints too. That rules out the scanner.

    Knowing the C-35 only remotely I would guess that it is a paper path/feed problem.

    Hans


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    Re: C35 skewing

    Ok, so it happens on prints. Do you have multiple paper sources? Try all of them to determine which are affected. It's probably not a laser skew, because laser skew would not vary, it would stay exactly the same. So it's a paper skew.

    On this machine its a relatively short path from the tray to the registration rollers. Anything from loose tray guides, to label adhesive on the guides, to uneven pressure on the registration rollers can cause skewing.

    And No I've never seen specific cases of paper skewing on a bizhub C35, but I can think my way through it. And so can you.
    And I'll help if you'll let me. =^..^=

    Last edited by blackcat4866; 07-29-2012 at 04:09 PM.
    If you'd like a serious answer to your request:
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    Re: C35 skewing

    Sorry for the misunderstanding. It wasn't meant to come across lazily. The device has been looked at by a couple of techs, the problem comes and goes. Sometimes skews, like noises, have a particular point of failure that are unusual but have been experienced by others, especially when they have such a low copy count.


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    Re: C35 skewing

    Have you swapped out the paper tray? I just had one the other day skewing from the main tray, because the little felt pad thing on the rear paper guide was coming off and interfering with the paper leaving the tray(causing a drag on the one side) Also with such a small tray capacity, the paper being loaded could have a bent corner in the stack, causing the tray to lift unevenly...this too will cause skewing. BTW I hate intermittent issues

    Everyone has the right to be stupid. Some people just abuse this privelage more than others

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    Smile Re: C35 skewing

    Had one skewing that was caused by uneven pressure on the vertical transport rollers on tray 3. The shaft of the roller isn't held very securely and the pressure seemed to fluxuate from front to rear causing the skew. Only cure found was to replace the tray ( more cost effective than the man hours)


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    Re: C35 skewing

    Have you made any progress Jr2? I have a few of these in the field, and would like to learn from your experience. =^..^=

    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.


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

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    Re: C35 skewing

    One thing to check is the fuser guide, I had a C35 a couple of weeks ago with similar issue and the guide was broken on one end.


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