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FB500 Lamp Hours/Power

Discussion in 'Hewlett Packard' started by neil_se, Jan 16, 2014.

  1. neil_se

    neil_se Member

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    Jan 21, 2012
    Qld, Australia
    I'm up to 700 hours on my first set of FB500 lamps. It's pretty subjective to tell whether the ink is still curing as best as it could, at what point do others increase the lamp power to account for the diminishing output with age?
     
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  2. Desert_Signs

    Desert_Signs Active Member

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    Jan 31, 2011
    For the price, I just replace mine when the machine calls for it, at 500 hours. It's easy and inexpensive.
     
  3. OutputTech

    OutputTech Member

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    i turned up the intensity, then changed the lamps recently on my fb700
    if blue painters tape pulls off the ink its time to change the lamps
     
  4. Turnergraphics

    Turnergraphics Member

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    Jan 4, 2014
    Boiling Springs,SC
    fb500 lamps

    I purchased 2 new lamps and they both have a large brown spot in the middle, which makes me think it's used. My old lamps have 800 hours on them and don't have a large brown spot on them. The spot is kind of glittery. Has anybody else seen this? Are the new lamps good? My tech says it's not unusual.
     
  5. Jboogie214

    Jboogie214 New Member

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    Im up to 767 hours on my fb 700. I just turned up uv lamp power when i noticed on some substrates that the ink felt sticky so to speak. That was the first sign the lamps were losing its curing power. So Far i haven't had any other issues curing wise. I do periodically scratch the edges of some samples i run especially on big jobs. If your able to scratch off the ink rather easily it be wise to change lamps. Good luck
     
  6. neil_se

    neil_se Member

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    Jan 21, 2012
    Qld, Australia
    I did increase the lamp power at around that 700 mark, and just replaced both lamps last week just shy of 1000 hours as the system kept throwing up a low current error.
     
  7. uvgerard

    uvgerard Member

    Brown spot on UV lamp

    I believe I addressed this before, the "brown spot" is actually iron iodide, a salt used in the manufacture of the UV lamp. When the lamp heats up it vaporizes into the arc stream. It will re-appear when lamp cools off. The fact you cannot see it in a used lamp simply means the halide salt is diffused around the inner surface of the lamp. Believe me it is still there.

    Lamps are not designed to last longer than 500 hours. If you change lamps and ink does not cure I would always look at the shutter assembly to be sure it opens all the way.
     
  8. Davo

    Davo Member

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    Jul 23, 2011
    Australia
    724 hours on the original lamps here and still going strong with the power increase function on. Still curing fine.

    At first we had a very strange problem with the UV lamps always reading under current, after installing a transformer to bring the voltage down it fixed the problem however now we have another problem with ink starvation on the cyan and even magenta. Had a few LVDS errors but ink system looks good and was flushed, filter replaced, vaccum good, headboard, IOboard replaced. Waiting on motherboard to be replaced along with LVDS cable. Hopefully the motherboard fixes it.
     
  9. uvgerard

    uvgerard Member

    Low output UV lamp

    Surprisingly for expensive printers most machines use UV power supplies of low quality.

    Due to current-voltage characteristics of UV curing lamps, a current limiting device must be connected in series with the lamp. The simplest and least expensive arrangement consists of a choke and ignitor connected in series with the UV lamp. The ignitor is required to start the lamp. Most printers rely on this technique to operate the lamp. Your machine operates with a choke.

    Use of a choke generates an undesired shift in phase between primary volts and amps. To correct this condition a compensation capacitor is used across the primary input. You might think of this as a power-factor correction capacitor. If your lamp was operating at reduced power (amps) more than likely the capacitor is the culprit. This normally is a cheap fix.

    Chokes are also influenced by line voltage. If you are having UV issues look at your line voltage going to your printer. Having 230 or 240 volts input is far better than 208 volts. If you have issues with lamps running and then dropping out (arc extinguishing) look at your input voltage.
     
  10. HulkSmash

    HulkSmash Major Contributor

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    Denver.
    We purchase NON HP Lamps and get about 1300-1400 hrs on them.. and they're 1/8th the price.
     
  11. uvgerard

    uvgerard Member

    HP UV lamp life

    We manufacture this lamp and it is designed for 700 hour life. We suggest changing lamps at 500 hours. To obtain 1300 hour life you must be operating at reduced power and not working on difficult to cure substrates such as corrugated plastic.

    This just proves that second source lamps are just as good if not better than OEM product.
     
  12. supersignmart

    supersignmart Member

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    Jul 11, 2005
    Ruston, LA
    Not sure I've ever changed a bulb (I have 2 printers) with less than 1500 hours. My printers run a minimum of 8 hours
    a day. I was told that since we don't start and stop our printer that the bulbs last longer, kinda makes some sense. BTW
    we only use OEM.
     
  13. VISCOM

    VISCOM Member

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    Dec 25, 2011
    New Cumberland PA
    what kind of UV printer do you have????
     
  14. Davo

    Davo Member

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    Jul 23, 2011
    Australia
    Thanks for the info Gerard. We now have about 236V entering the machine instead of the 250 odd that was before and have noticed the problem of under current has gone away. The lamsp are operating fine, even with an error of undercurrent they were still on.

    We have had 2 service end lamp assemblies go in the last month and are waiting on our 3rd to be installed later this week/early next week with the machine down and out. First it was a home position error and now the actual shutter motor has seized. Still getting constant starvation from the cyan and magenta heads with the IOboard, headboard and mutliple other items being replaced.

    We have had it with our FB700, while it's working it's great, will print on pretty much anything, red's a little lacking. But when something goes wrong then it's a pain as it's down and out. In the 7 or so months of operation it has been down for at least a whole month.
     
  15. dsgn4

    dsgn4 New Member

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    Oct 17, 2014
    have they considered replacing a complete igis chain?..if its not the i/o board..then i would say its the delivery system malfunctioning
     
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