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  1. T

    Two dots?

    Mmh let's hope I can fix it with the new focus unit/lens ...
  2. T

    Two dots?

    Should I clean it with some air ?
  3. T

    Two dots?

    The seller is offering to send a new lens without me returning this one. If I go for a return it will cost me 1/4 of the lasers price.
  4. T

    Two dots?

    a new lens would fix this?
  5. T

    Two dots?

    No secondary optics, only the stock collimating lens
  6. T

    Two dots?

    The second spot focusses with the main spot but it also seems to move slightly (1-2 mm) when rotating into focus. The rotation of the second spot is not nearly as fast as turning the ring.
  7. T

    Two dots?

    So I got this 5.5W laser from aliexpress (OXlasers) rigged up to my 3D printer for some engraving/cutting. Yesterday when trying to focus the laser I noticed a second dot next to the main dot. What is the cause of this? and can it be fixed? Thanks guys :)
  8. T

    Laser TTL

    This was the fix. Putting GND signal to PWM turns it off. Lovely :)
  9. T

    Laser TTL

    Ok but if I put no voltage on PWM pin it should stay off right? 5V on PWM pin doesn't change the result.
  10. T

    Laser TTL

    It's this one: https://www.aliexpress.com/store/product/oxlasers-TRUE-3W-5W-5500mW-445nm-450nm-focusable-blue-Laser-Module-Laser-Engraver-part-DIY-Laser/704555_32958503779.html
  11. T

    Laser TTL

    So i've just got a 5.5W blue laser module for engraving/cutting. It has 3 pins. V+, GND and PWM. I thought that the laser would turn on/off depending on the voltage on the PWM pin. But if I put 12V on V+/GND the laser turns on full blast. How can I control the output power?




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