Few months ago i have a problem with my 40 watt laser tube was that loosing power and arcing on the node side. Finally i end up building the new one with 60 watt laser tube. I’m in the middle of testing the laser tube and optical alignment but i have a problem during alignment and hope some can help me here.
So, my laser tube is moving along with the Y axis. I did optical alignment and have a great result, all the laser on the same spot start from X0 and X800 which is the maximum travel of X axis. I try doing some simple cut and engraving and all is quite good until i realized when i did a cutting job in the maximum X and middle of Y where i can not cut a 3 mm plexi glass.
After doing some check i can see the laser spot is getting lower and lower when moving the Y axis. The distance between spot at X800, Y0 and X800, Y 750 is around 10 mm. Currently i suspect this is do to the misaligned of mechanical part where the the motion part (linear guide ) is placed. I think the right side of the linear guide is higher at maximum Y axis.
Is there any reasonable root cause other than mechanical problem?
@Fabiano_Ramos did you have the same problem as mine and can solve by adjusting the 1st mirror? since my tube is move along with Y axis, so mirror 1 and 2 will also moving. The only possible reason for me is the alignment of the gantry
@Alisha_kansha yes. I adjusted following the guide that I posted for you and apparently, according to his own information, is a symptom of not framing the second mirror, relative to the first in exact (or approximate) 90 degree angle.
However, So what I did was unscrew the screws as in the picture, and move GENTILLY left or right as directed in the link I sent. Even fully center on both mirrors. It’s laborious, it takes time, but it works.
P.S. There is also a probability of having a small piece of paper underneath the mirror (Image), to tilt it slightly down and compensate for the alignment of the mirror.