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Thread: unidirectional or bidirectional printing

  1. #1
    Donor peppealfo is on a distinguished road
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    unidirectional or bidirectional printing

    hello, some may explain me the difference between uni and bidirectional printing , i'm using multirip gp as software

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    Banned Tsar is on a distinguished road
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    With bi-directional printing you'll get double the speed, but with uni-direction, you normally get some better quality, and you give some more time to the ink to dry before adding another pass, avoiding ink saturation.

  3. #3
    Donor peppealfo is on a distinguished road
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    Quote Originally Posted by Tsar View Post
    With bi-directional printing you'll get double the speed, but with uni-direction, you normally get some better quality, and you give some more time to the ink to dry before adding another pass, avoiding ink saturation.
    does that means that the printer print in only a way when it moves?

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    Banned Tsar is on a distinguished road
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    Yes

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    PRC Member spider is a name known to all spider is a name known to all spider is a name known to all spider is a name known to all spider is a name known to all spider is a name known to all
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    Quote Originally Posted by Tsar View Post
    With bi-directional printing you'll get double the speed, but with uni-direction, you normally get some better quality, and you give some more time to the ink to dry before adding another pass, avoiding ink saturation.
    absolutely not true! the print head is moving faster back to the home position for unidirectional printing than normal printing speed. so you wont get half printing time for bidirectional printing.

    how much time you will save with bidirectional printing depends on the printer model.
    some of them have to move the print head along the whole printable area and some can switch their direction right at the end of the printing image.

  6. #6
    Donor peppealfo is on a distinguished road
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    Quote Originally Posted by Tsar View Post
    Yes
    ok, many thanks, now is all clear

  7. #7
    Donor peppealfo is on a distinguished road
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    Quote Originally Posted by peppealfo View Post
    ok, many thanks, now is all clear
    any can help me to found ACRORIP Software? i need it for my DTG printer

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    Junior Member Growler is on a distinguished road
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    What sort of print technology.

    UV cured inks obviously won't suffer from saturation issues using bi printing, but you will suffer from 'lawn mower' style curing patterns, this can be completely avoided by using uni print setups.

    I print 95% of my work in uni no matter if I am using solvent or uv cured inks. If I have a really tight deadline I will pull bi directional but it's generally not needed.

  9. #9
    Donor peppealfo is on a distinguished road
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    Quote Originally Posted by Growler View Post
    What sort of print technology.

    UV cured inks obviously won't suffer from saturation issues using bi printing, but you will suffer from 'lawn mower' style curing patterns, this can be completely avoided by using uni print setups.

    I print 95% of my work in uni no matter if I am using solvent or uv cured inks. If I have a really tight deadline I will pull bi directional but it's generally not needed.
    i use my home made dtg printer based on epson 1900, pls can some send me acrorip with crack? i cannot download it from the forum couse i'm a beginner . Thanks
    Last edited by peppealfo; 06-06-2013 at 03:41 AM.

  10. #10
    Junior Member djabollo is on a distinguished road
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    Acrorip 8

    Quote Originally Posted by peppealfo View Post
    i use my home made dtg printer based on epson 1900, pls can some send me acrorip with crack? i cannot download it from the forum couse i'm a beginner . Thanks
    send me PM with you email address... i can help

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  12. #11
    Junior Member neil_se is on a distinguished road
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    I use bidirectional for solvent, latex and UV unless I'm printing for backlit media (so the ink limits are very high).

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    Junior Member toto81 is on a distinguished road
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    If you use Bi-Di be aware that the the distance from printhead to media (platen gap, on plotters, material thickness) be consistent. Then apply a bi-di align adjustment.
    Otherwise you will get some slight blurring, specially in small caracters.
    To avoid this, and have more flexibility in media thickness, use uni-directionnal.

  14. #13
    Banned Gm70 is on a distinguished road
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    Quote Originally Posted by Tsar View Post
    With bi-directional printing you'll get double the speed, but with uni-direction, you normally get some better quality, and you give some more time to the ink to dry before adding another pass, avoiding ink saturation.
    Also whne using uni your colors are always laid in the same order. Whereas with Bi-directional cyan goes on top of magenta and vice versa. So it affects also slightly on the colors.

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