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Thread: Help with cheap laser galvo set.

  1. #1
    Join Date
    Nov 2007
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    Scottish Highlands
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    232

    Default Help with cheap laser galvo set.

    Just getting back into lasers. I spent a lot of money that I shouldn't have done the first time round, and I want to get back in slowly!
    I bought this cheap little galvo set from Aliexpress :
    https://www.aliexpress.com/item/30K-...311.0.0.yiXjSB

    I thought it would be a good way to play about with things. However, it came with no connection information whatsoever! I can work some of it out, but I don't want to wreck it the first time I power it up.
    I think it's made by a company called LH Laser. I contacted the seller, who did respond, but I have have had nothing useful from him.
    I hope someone can help. Thanks, David.

  2. #2
    Join Date
    Mar 2015
    Location
    Cambridgeshire, England
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    470

    Default

    That is very cheap! It looks like a lot of the Chinese sets that are on ebay, so there should be plenty of info around.

  3. #3
    Join Date
    Oct 2012
    Location
    Germany
    Posts
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    Default

    ... the connection pins are known, so shouldn't be so problematic.

    You need a symmetric PSU with: +15V/-15V, @1A each.

    The stated "-5V ~ + 10 V analogsignal" is eventually an error -- use +5V/-5V-signals, what's more common ...

    Viktor

  4. #4
    Join Date
    Nov 2007
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    Scottish Highlands
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    Default

    Thanks for the comments etc. I have got it going - the PSU is included. I found a Youtube video (very poor quality) of one of these in action : https://www.youtube.com/watch?v=uobH7XlY5WI
    but it was enough to show the connections I was unsure about. I will get it mounted properly and start playing

  5. #5
    Join Date
    Nov 2012
    Location
    Netherlands
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    Default

    Quote Originally Posted by xntrix View Post
    Thanks for the comments etc. I have got it going - the PSU is included. I found a Youtube video (very poor quality) of one of these in action : https://www.youtube.com/watch?v=uobH7XlY5WI
    but it was enough to show the connections I was unsure about. I will get it mounted properly and start playing

    Wish I Found this sooner,

    bought same set from Ali
    started connecting everything with included cables

    magic smoke released from LCD board

    (I was given wrong cable)

    have been messing with pots, but cannot get decent image to appear

    got money back and ordered another from other seller

  6. #6
    Join Date
    Nov 2007
    Location
    Scottish Highlands
    Posts
    232

    Default

    If you need any help with this when you get the replacement, give me a shout.







    Quote Originally Posted by mrfloppy View Post
    Wish I Found this sooner,

    bought same set from Ali
    started connecting everything with included cables

    magic smoke released from LCD board

    (I was given wrong cable)

    have been messing with pots, but cannot get decent image to appear

    got money back and ordered another from other seller

  7. #7
    Join Date
    Nov 2012
    Location
    Netherlands
    Posts
    77

    Lightbulb

    how do I get it to go from chinese language to english?


    nvm, Found it...

    works well

    measured the values of the POTS and replicated it on the board i screwed up, hoping for a baseline to learn to tune from....
    Last edited by mrfloppy; 12-10-2019 at 06:49.

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