Problem with Laser module focus

  • I seem to be having problems getting a focused spot with the laser module on the Eleksmill. I have tried raising and lowering the module but the spot is never less than 3 or 4 mm. Can anyone take a look at the attached picture and tell me if there is anything missing, such as a lens?
    The lens inside the unit is quite a long way down so I am wondering if it should be adjusted or not. I tried to give it a turn but it seems to be reluctant to move. Any help would be appreciated, especially if someone can post a picture of what a working laser looks like.



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