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Thread: Scan Size Calculation Problem

  1. #21
    Join Date
    Jul 2005
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    Lancashire UK
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    1,379

    Default

    For best performance ... yes ( depending on your scanners )
    8 degs is optimum for 30k scanning images
    although i dont have Beyond as i only have Qm2000 with livepro ... but the settings in my Pangolin of 0 to 100 equate to the DAC voltage output 0 to 5 volts

    Karl

  2. #22
    Join Date
    Aug 2008
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    UK
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    Rob, how do you determine the limits?

    Looking for distortion then backing off a little?

  3. #23
    Join Date
    Jan 2007
    Location
    Sheepsville, Wales, UK
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    3,406

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    Al
    I do beam shows. I never do graphics cos I dont like them (too much edam) and think they are very outdated and the power of video projection far exceeds laser graphics, so my beam world will be very different to a graphics world. The exception is logo or text projection but they will never be scanned wide anyway unless I have to be 3 feet from the termination!
    In beams I run 30 or 40k scanners at 18-20k. That way they can scan wide without having to defy the laws of physics. Its better visually (as long as you dont have too many points - but then again I use this to advantage) and it means the scanners will last for more than 2 shows.
    For beams it really does not matter if corners are a little rounded or the circles are not perfect - the effect is in the air not on a wall.
    Like I said understand zones and dont dwell on things like actual scan angle and you will do yourself a huge favour.
    Rob
    Rob
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  4. #24
    Join Date
    Jun 2009
    Location
    St. Louis, MO
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    1,198

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    Quote Originally Posted by White-Light View Post
    Hi,

    The distance laser to wall is 274cm

    The Test Pattern displays at 60cm square
    I looked but didn't see the answer, so:

    arctan(30/274)*2=12.5 degrees

    brian

  5. #25
    Join Date
    Aug 2008
    Location
    UK
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    Hi Brian,

    Many thanks.

    Seems I'm either doing something wrong with the scan angle calculator or it works incorrectly.

    Anyway, if anyone needs one, I've now found one online that came to the same result as you:

    http://www.diodelaserconcepts.com/ph...lator.php?m=fa

    Interestingly enough Rob I found out why I couldn't set different angles in different zones in Beyond, there was a bug. Alexey has now fixed it for the next build.

  6. #26
    Join Date
    Mar 2008
    Location
    Canton, GA USA
    Posts
    384

    Default Scan-Angle Calculator

    Hi All,

    I just stumbled on to this thread.

    If anyone's still interested, I wrote a Scan Angle Calculator a couple of years ago.

    The thread is here: http://www.photonlexicon.com/forums/...gle-Calculator

    Or the calculator is here: http://www.photonlexicon.com/forums/...3&d=1237918232

    Enjoy!

    Tim

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