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FB500/700 users ->

Discussion in 'Flatbed Printers' started by parrott, Sep 3, 2013.

  1. parrott

    parrott Member

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    Jan 2, 2008
    Vol Nation
    We have been noticing dots of ink on the back of substrates after they have been printed. We realized that it is excess ink coming from the vacum holes in the belt after we have printed a bleed. Ink has been printed onto the belt and gone through the vacum holes which does not cure and gets sucked back up onto the back of boards. We had a tech come out and he changed out the fan board (that has 3 fans) that is under the belt, but that has not stopped the problem. He thinks that we are printing onto the belt more than it is designed to handle. Is anybody else having this happen? If so, how do you work around this or minimize it?
     
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  2. parrott

    parrott Member

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    Bump for all the FB users.

    Also, anybody having success with static cling? If so, what profile are you running?
     
  3. growler

    growler Member

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    Apr 20, 2010
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    I had the ink on back issue with my dilli. I just run a long x 70mm wide strip of a cheap synthetic on the edges, I don't know if a HP can do that but that picks up all my bleed overspray and removes the issue all together!
     
  4. Mspec

    Mspec Member

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    Jul 7, 2008
    How much overprint are you running, and are you using "borderless sheet" on your Onyx?

    To hit a good full bleed on the 500/700 you do not need more than 1/8 inch overprint, unless your media is irregular. I see a lot of shops select the borderless sheet option in Onyx thinking that it sounds like what they want to do, but that media selection builds in a -.2" margin and winds up putting a lot of ink on the belt, and usually creates a centering issue with the image. That Onyx setting is for printers that do not have an overprint setting built in, and should not be used on the FB500/700

    All you need to hit a good full bleed print is .25" extra in both directions, and an overprint setting on the printer of -.125" top to bottom, and left to right. ( so for an 18x24 sign, rip the file to 18.25x24.25", set -.125 margin for leading, trailing, and both sides, and print position centered on the PRINTER, left justified in Onyx ) With only 1/8" overprint you should not be creating so much aerosol that it is coming around the edges much, if at all.

    Does this match your workflow?
     
  5. cwb143

    cwb143 Member

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    Shorten your bleed and clean the belt from time to time. Also this printer doesn't do well with thin materials good luck.
     
  6. Chiprinting

    Chiprinting New Member

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    Sep 3, 2013
    Overspray

    Using a thin grade of packaging tape on the belt at the edge of your print will collect the overspray and is easy to clean up with changing the tape if you print a lot of the same width.
     
  7. cwb143

    cwb143 Member

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    Also I've never seen a printer that cleans itself as much as these FB5/700s do. It's good they clean themselves but man it's everytime you go to touch a button it jumps into cleaning mode. And it doesn't matter how much you print either I don't care what the salesman or installer says. They're not print operators printing actual jobs that consist of 100 sheets day in and day out. And it cleans even more in white mode
     
  8. neil_se

    neil_se Member

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    Jan 21, 2012
    Qld, Australia
    I switch mine off at the base when not in use which has really saved on ink wastage. It still does automatic cleaning a few times a day so I don't believe it could do any harm having it off (rather than standby) the rest of the time.
     
  9. jasonx

    jasonx Very Active Member

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    You will want to have the auxiliary power turn on though for the vacuum so you don't loose the pressure in your print heads.
     
  10. neil_se

    neil_se Member

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    Yeah it stays on (with UPS backup too).
     
  11. Fourteen Sixteenths

    Fourteen Sixteenths New Member

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    Aug 8, 2014
    To the original poster: Were you ever able to resolve this issue? We have the exact same issue happening and are looking for any additional advice!
     
  12. greysquirrel

    greysquirrel Active Member

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    Aug 13, 2015
    West Berlin, NJ
    dots on back of prints...all printers produce aerosol and the fans inside these printers move that "live ink" all over the place. I have seen that the FBs show this with paper products more than anything else. Try to avoid printing with a large overprint...unless its corrugated plastic (which is never square) you should just be able to print actual size.
    You can also reduce the head height (as low as .065) to help...reduce vacuum level and also for the problem child materials, print in "fine text mode" This will slow the carriage down roughly 30% and actually help on certaim medias.

    The only other thing that I have seen people do is run a strip of low tack tape along the back edge of the sheet being affected...time consuming but it works.
     
  13. supersignmart

    supersignmart Member

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    Jul 11, 2005
    Ruston, LA
    We had 2 FB950 (same as 700) and we kept them on performance cleaning. We kept the waste ink for 1 year and determined we were spending close to $7000 a year on cleanings. The HP's were good printers but by no means a production machine.
     
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