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Need Help Question Mimaki UJF 7151 Plus Carriage Slams Violently

Discussion in 'Mimaki' started by GHardie, Jan 28, 2020.

  1. GHardie

    GHardie New Member

    3
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    1
    Jan 28, 2020
    Colorado
    Hi Everyone,
    First off, I'm new to the forum so please let me know if I messed anything up here.

    Anyway, last week our UJF 7151 Plus developed a pretty alarming bug. I was not in the shop when it first happened but I was told that after the second print of the day, instead of the carriage coming to its home position normally, it went full speed all the way and crashed HARD into the right side of the printer.

    After I got in I was able to get the printer to boot back into normal operation mode and actually perform ONE test print with no issue. It was after the SECOND test print that the issue reared its ugly head again. the second test print appeared to go as normal until the time when it would normally come to the home position. Here is a video of the second test print (right side panel is removed here) https://d.pr/v/GFyIj0

    So far I have inspected all belts involved with the y-axis( they look fine to my eye), cleaned and lubed the rail and cleaned the encoder strip. None of which have resolved the issue. I also have a new y motor timing belt and new y motor on the way.

    We are working with a tech on this, but It could be a while for an in-person visit so I just wanted to reach out and see if anyone here has seen a similar problem.

    Thanks!
     
  2. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

    4,292
    808
    113
    Aug 2, 2011
    Denver, CO
    I had a Mimaki JFX200 do this once and the motor ended up fixing it. That motor looks very similar if not exactly the same as the JFX200. One other thing I would maybe try is cleaning or replacing the Y-Origin sensor. It's what tells the machine it's in the home area.
     
    • Agree Agree x 1
  3. GHardie

    GHardie New Member

    3
    0
    1
    Jan 28, 2020
    Colorado
    Thanks for the suggestion, we have a Y motor arriving tomorrow, fingers crossed that does the trick. Hadn't thought of the Origin sensor, that will definitely be my next step if the motor doesn't resolve it
     
  4. hand851

    hand851 Roland Mutoh & Mimaki inks digiprint-parts.com

    196
    17
    18
    Nov 22, 2010
    Columbus, Ohio
    When it was installed did the tech back up the parameters? I suggest you reload current Firm Ware and the parameters.If the motor doesn't fix this.
     
  5. Smartish

    Smartish New Member

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    1
    Jan 27, 2020
    Austin, TX
    What did you use to lube the rail?
     
  6. GHardie

    GHardie New Member

    3
    0
    1
    Jan 28, 2020
    Colorado
    I used WD-40 to clean it up then applied 3in1 oil from the hardware store, been running great since then. My original issue was resolved by replacing the Y-motor BTW
     
  7. hybriddesign

    hybriddesign owner Hybrid Design

    35
    7
    8
    Jul 31, 2012
    Honolulu
    I'm not sure of how similar this is to the way that mimaki sets up their large format printers but I'm guessing that they our fairly close. Our JV150 did the same thing one week out of warranty (of course) and after trying everything it ended up being the main board. We figured it was the home sensor, messed up encoder, scan motor, etc but none of those fixed it. I guess the good thing was that it got almost a complete makeover in the process...

    QUOTE="GHardie, post: 1462213, member: 81060"]Hi Everyone,
    First off, I'm new to the forum so please let me know if I messed anything up here.

    Anyway, last week our UJF 7151 Plus developed a pretty alarming bug. I was not in the shop when it first happened but I was told that after the second print of the day, instead of the carriage coming to its home position normally, it went full speed all the way and crashed HARD into the right side of the printer.

    After I got in I was able to get the printer to boot back into normal operation mode and actually perform ONE test print with no issue. It was after the SECOND test print that the issue reared its ugly head again. the second test print appeared to go as normal until the time when it would normally come to the home position. Here is a video of the second test print (right side panel is removed here) https://d.pr/v/GFyIj0

    So far I have inspected all belts involved with the y-axis( they look fine to my eye), cleaned and lubed the rail and cleaned the encoder strip. None of which have resolved the issue. I also have a new y motor timing belt and new y motor on the way.

    We are working with a tech on this, but It could be a while for an in-person visit so I just wanted to reach out and see if anyone here has seen a similar problem.

    Thanks![/QUOTE]
     
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