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Thread: Galvo problem

  1. 02-18-2011, 05:22 #1
    claber
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    Default Galvo problem

    Hello, does anybody has the description of driver pots in the Yagang LT-6 100mW Green Laser?

    When the laser is running, galvos go to their center position, red leds on the driver starts to switch off and mirrors is not moving, but if i touch the mirrors a little bit then it starts "peep"

    Please help, how can i adjust it without osciloscope
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  2. 02-18-2011, 08:27 #2
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    Doc
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    That doesn't sound like an adjustment problem, more like no signal is reaching the galvo amps.
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  3. 02-18-2011, 09:43 #3
    claber
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    Laser has two signal wires from controller PCB- 1 wire for each X and Y driver, the voltage is 1.78 V and it's static, how can i check it?
    This laser hasn't the ILDA and DMX, can i connect the ILDA output signal to the drivers directly to it's input signal wire or that galvos can't work with ILDA controllers?
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  4. 02-25-2011, 23:59 #4
    claber
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    I have found the problem, it was quad amplifier for Y channel from graphic controller card. So now the two galvos are working, but i need to tune it. Now i don't have a geometrical figured image only sin waves or something like a circle with sin waves in some patterns. Galvo amps doesn't has ILDA input, graphic card doesn't has DMX input. Patterns constantly changing by Automatic control. So i don't know in which time what figures shall be projected. Also each driver has 5 unnamed pots, so i don't know which pot is used for.

    Which ways it can be tuned back?

    Maybe i can use my sound card as oscilloscope? I can't find exact information about tuning galvos without an ILDA test pattern.

    Does the two outputs from drivers to the galvos must fed both same shaped frequency waves?
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