Walt Langhans
02-13-2013, 8:55 PM
Hi All
I was using a 40mm focus distance lens and the focus distance from the end of the nozzle was 7mm. I ruined my 40mm lens and got one with a 50mm focus distance. While asking for advice about what lens to get, it was also pointed out to me that my nozzle assemble wasn't completely perpendicular. I got my nozzle assemble perpendicular but that threw out my alignment, so I figured all I needed to do was to realign it at the last lens which I did.
Next I started to try and find my focus distance. I first tried the line idea that Dan suggest using a piece of MDF, and I really didn't see any line really stand out.
254279
Next I tried some letter and circles, the left side (which looks the best to me) is about only 2mm from the end of the nozzle and going left to right the distance increases.
254280254281
Looking at the results I not thrilled with any of them but I figured the focal length had to be in there somewhere, so I went back and started checking the alignment from the beginning.
I 'm dead center from the laser tube to the closest mirror. When I have the next mirror at the top of the machine the dot is centered left to right, but is high. Then when I move the mirror to the bottom of the machine I'm still good left to right but now the dot is low.
My problem is that when I turn the top adjustment screw in (to the right) it drops the dot, or loosen it (to the left) it raises it, but I need to lower one dot and raise the other, it like I need to fold the mirror. Any idea how to do that?
I hoping that my alignment issue will help focus issue but I'm concerned because the best results I got where when the nozzle was closest to the MDF, but it was only a 1-2mm away which is less distance then my original lens with the shorter focus distance. I'm not sure how that's possible, shouldn't my focus distance with the new lens be further than the old one?
Any help will be greatly appreciated.
Thanks
I was using a 40mm focus distance lens and the focus distance from the end of the nozzle was 7mm. I ruined my 40mm lens and got one with a 50mm focus distance. While asking for advice about what lens to get, it was also pointed out to me that my nozzle assemble wasn't completely perpendicular. I got my nozzle assemble perpendicular but that threw out my alignment, so I figured all I needed to do was to realign it at the last lens which I did.
Next I started to try and find my focus distance. I first tried the line idea that Dan suggest using a piece of MDF, and I really didn't see any line really stand out.
254279
Next I tried some letter and circles, the left side (which looks the best to me) is about only 2mm from the end of the nozzle and going left to right the distance increases.
254280254281
Looking at the results I not thrilled with any of them but I figured the focal length had to be in there somewhere, so I went back and started checking the alignment from the beginning.
I 'm dead center from the laser tube to the closest mirror. When I have the next mirror at the top of the machine the dot is centered left to right, but is high. Then when I move the mirror to the bottom of the machine I'm still good left to right but now the dot is low.
My problem is that when I turn the top adjustment screw in (to the right) it drops the dot, or loosen it (to the left) it raises it, but I need to lower one dot and raise the other, it like I need to fold the mirror. Any idea how to do that?
I hoping that my alignment issue will help focus issue but I'm concerned because the best results I got where when the nozzle was closest to the MDF, but it was only a 1-2mm away which is less distance then my original lens with the shorter focus distance. I'm not sure how that's possible, shouldn't my focus distance with the new lens be further than the old one?
Any help will be greatly appreciated.
Thanks