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Thread: DT-40 Pro "centering"

  1. #1
    Join Date
    Mar 2007
    Location
    Rotorua New Zealand
    Posts
    528

    Question DT-40 Pro "centering"

    Hi Guys,

    I have my DT 40 pro running quite well on one machine at this time.

    However when I ran it up first the "laser dot" was off to one side by quite a few degrees... didnt worry too much, just thought I had misaligned the galvo mechanically. So in the meantime I just told Pangolin LD2000 to apply an offset correction.
    ( that works but of course is 'stealing' X gain).
    However, that is treating the symptom not the cause.
    I have just done a physical re alignment using set squares etc and guess what ?? its still out to one side ( X is out Y seems ok). It might have prostate problems maybe ??
    Beam is sitting very nicely centered on the mirrors

    Does this mean..
    1) I have to adjust the amplifier board like the IOF Input offset position ?.
    2) Do I loosen the galvo clamp and 'twist' it to align ??
    3) Any other ideas.

    The galvos seem to work very well, the only adjustment I have made is to reduce the input scale factor as suggested by Yaddatrance here on PL, as I have Pangaolin with balanced input to the DT40 amp.

    I am reluctant to jump in and make it worse, I have seen too many stories here on PL of "do first ask later". China is along way away to get help.

    Thanks guys

    Ray
    NZ

  2. #2
    Join Date
    Nov 2005
    Location
    Melbourne, Australia
    Posts
    3,693

    Default

    Quote Originally Posted by Pitts View Post
    1) I have to adjust the amplifier board like the IOF Input offset position ?.
    2) Do I loosen the galvo clamp and 'twist' it to align ??
    3) Any other ideas.
    Ray
    NZ

    Number 2

    Only mess with this when the galvos are un-powered. Ie, power down, align, power up and check, etc
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  3. #3
    Join Date
    Mar 2007
    Location
    Rotorua New Zealand
    Posts
    528

    Default

    Thanks Dave.. problem fixed... just didn't want to make matters worse.

    By the way did you see if you had any of those shutters that you thought you might have had left ?? PM me if you have something.

    Cheers
    Ray
    NZ

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