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I got these instructions for laser collimation off CN but I can't remember his name, sorry.
Once you have the laser in a static position where it can only rotate, and not slide back and forth in any way then you can rotate it through 360 degrees . Number the laser collimation screws 1, 2 and 3 with a pencil (as this can write on the black tube) and then as you rotate mark the position of the spot on the wall when screw 1 is up, then 2 , then 3. Numbering the dots will help you work out which to adjust and which to slacken.
Next join the dots to form a triangle and then put a spot in the middle of this. Now adjust the screws to move the laser spot onto this. Once again rotate the laser to make the triangle, draw another centre spot and readjust again.
By doing this I managed to get a single spot when rotated within about 10 min’s and three "triangle" cycles.
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