Probably for a week I can’t properly align my K40 mirrors.
I used youtube guide Proper K40 Mirror Alignment Strategy - YouTube it looked promising at first
I will try to explain the steps I took.
I noticed that beam from the tube hits the first mirror quite high, so to not mess up with the tube I raised the mirror 1 about 4mm, now it’s dead center.
the main thing from the youtube guide was when align mirror 1 to mirror 2 first align horizontal and vertical to gantry axel witch I did. Moving mirror 2 to top and back to bottom, both test shots were dead center. And also I raised mirror 2 because I raised mirror 1.
Then it was the turn of mirror 3. I adjusted mirror 2 so it goes parallel with the bottom x-axis and both left test shot meets right test shot dead center than I moved to the top right and top left. The top left was in the same spot as the bottom left and right, but the top right was 2 millimeters too high.
I found that I can lift the gantry top right corner with few metal washers which I did but it didn’t make any difference.
The main problem is that beam from mirror 3 to the lens is hitting in a corner.
This image shows the laser head raised and regular height shots of the focus lens burn from the bottom of laser head.
not raised laser heads lens shot look better, but mirror3 shots are too high.
Sorry for my English. I hope everyone will unstrand my frustration