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Thread: Help with cheap laser galvo set.

  1. #1
    Join Date
    Nov 2007
    Location
    Scottish Highlands
    Posts
    230

    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
    Posts
    383

    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
    880

    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
    Location
    Scottish Highlands
    Posts
    230

    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

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