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Crop marks

Discussion in 'Roland' started by Deere, Jan 16, 2013.

  1. Deere

    Deere Member

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    Feb 2, 2012
    canada
    Have a SP540V and having crop mark issues. I print,laminate, then cut. When I try to find crop marks it usually takes a half and hour or more. Is there any tricks or maybe a sensor to adjust? It eventually finds them but takes a lot of time. Any suggestions?..
     
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  2. fmg

    fmg Very Active Member

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    Dec 14, 2009
    Laminate gloss or matte.Sometimes the gloss reflects back onto the optical sensor and won't recognize the crop mark.Try placing a piece of matte laminate over the crop mark area and this may solve.
     
  3. Wheeler

    Wheeler Member

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    Feb 25, 2010
    I do a manual alignment if it doesn't detect crop marks, Instructions are on page 83 in the user manual.

    The instructions are not very clear after you get all the alignment marks locked in and resend to printer. It will start looking for the marks again like in auto, Just hit pause and then hit enter on the printer and it will start cutting.

    Takes a little practice to figure out, After you learn how it is easy. Sometimes I think it cuts better than the auto mode.
     
  4. CentralSigns

    CentralSigns Very Active Member

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    Jan 23, 2010
    Golden BC
    Place the start point on the crop mark by setting the base point. This makes it find them easier.
     
  5. FrankW

    FrankW Very Active Member

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    Oct 19, 2008
    Germany
    There is a possibility to adjust the sensor in service mode.

    Remove the plastic cover from the tool carriage, and you will find a potentiometer on the left side of the cable connectors in front of the cut carriage board. Choose CROPMARK SENSE Menu in Service Menu and then OUTLEVEL CHECK (Enter). A black rectangle will be printed and the sensor will be placed above it. The value should be at minimum 2.5V, better higher. If lower (wait for the ink to dry), turn the potentiometer with a little screwdriver.

    But overall there are more reliable cropmark sensors than the roland quadralign. And there are other reasons for malfunction of this sensor too (for example damaged cut carriage cable and so on).
     
  6. MikeD

    MikeD Active Member

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    Oct 25, 2011
    optical sensors can be calibrated to work on specific media that may provide low contrast against reg marks or medias with a high level of reflection
     
  7. DizzyMarkus

    DizzyMarkus Active Member

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    Jan 23, 2012
    I agree with the base point.

    Load material
    Allow sheet set
    Set base point where crops are lined up with the cutting strip :0)
    Mines finds them first trip this way (sp300v)


    Markus
     
  8. OADesign

    OADesign Active Member

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    Jan 27, 2006
    California
    This may sound silly but, have you tried cleaning the eye? Sometimes the over-spray builds up on the sensor eye making it difficult for it to detect the contrast of the crop marks. THis has work for me in the past.
     
  9. SIGNTIME

    SIGNTIME Active Member

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    Aug 13, 2012
    NY
    Need more info, is the problem finding the first crop mark or the second or third or fourth? If your having trouble with the first crop mark then you need to start with the eye near the crop mark, and set a base point. Or put matte lam over the crop marks ( I have never had a problem with gloss laminate making it hard to "see" the marks).

    If its the 2nd 3rd or 4th your having troubles with it may be your sheet wasn't put back in square. Easiest way to get the sheet in square is to line up your leading edge with the edge of the sheet cut trench assuming your leading edge is square. Also I think it's not recommended to cut over 12' linear.
     
  10. Bowring

    Bowring New Member

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    May 27, 2015
    I've found that turning the senser voltage up to 13.4 works for me, the service manual says 12.7
     
  11. JLD984

    JLD984 Member

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    Feb 21, 2012
    Australia
    I've had a lot of trouble with this and eventually noticed it is better/worse at different times of the day. My printer is directly under the only light in the room so if there isn't enough light coming in the window it struggles to detect the crop marks. Now I just direct the spotlight on my iPhone at each crop mark as it approaches and it nearly always detects them.
     
  12. Cubesmith

    Cubesmith New Member

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    Oct 29, 2012
  13. Stormyj

    Stormyj Member

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    Jan 20, 2014
    NW Indiana
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