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    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 :)
  2. 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?