Head alignment and double line

Lasers
1

20240616_230117
20240616_2301173024×3024 1.13 MB

20240616_230341
20240616_2303414896×6528 2.68 MB

Hi,
I have had issues last night with double line while cutting. After looking around i found some information about possibly been the light reflected by a scratch in the lens (lens has a little chip on the edge but centre is clear. I have a new lens and better mirrors in the post just in case)

Or maybe light from second mirror hitting the inside of the head.

So i have removed the lens, and done some firing tests
Beam enters the head, pretty close to the centre, but exits really close to the edge…
The same exit spot happens close and father away from the 2nd mirror.

Thought maybe the head is not perpendicular so I’ve tried to shim the head by putting some washers under the plate on one side, but it doesn’t seems to help.

Any other ideas?

Thanks

2

You can try shimming the mirror in the holder with some small piece of tape blue tape. Better lasers have adjustable mirrors on the laser head, but unfortunately the K40 does not.

1 Like
3

You could try to turn your laserhead with mirror 3 a little bit to the left or right.

4

20240619_203848_resized
20240619_203848_resized2268×2268 887 KB

20240619_204345_resized
20240619_204345_resized2268×2268 935 KB

20240619_220213_resized
20240619_220213_resized2268×2268 567 KB

20240619_221541_resized
20240619_221541_resized3672×4896 1.78 MB

20240619_221627_resized
20240619_221627_resized2268×2268 956 KB

Thanks for the advice.

So I checked the mounting plate and it seemed to be bent. Bent it upwards, and it look like it worked a bit. I have also tried to put some tape under the head, since it seems to be bent in the other direction as well…but now the head feels loose. Might be moving during use?

Any chance that something else is also out of level?

When I first put the new tube, it seemed to be working better… for a bit
I feel like I have been going back an forth trying to align it… If it’s close the middle on the 3rd mirror, close to the 2nd, then it’s well out when it’s father away from it

Is it even possible to align the laser across the all table?

Apologies for the ranting, but it’s frustrating

5

Well, ive been away for a while.
After getting back, I did realign the gantry as it seems it was a bit off.
Now i have tried to make an adjustable plate using threaded bolts, teying to fix the previous issue with double lines

20240806_190901
20240806_1909013056×3056 1.12 MB

Beam from mirror 1 to 2 hits pretty much the same spot from close to far, but i cannot align mirror 3
As you can see fron the photo, 1 is closer to mirror 2, the further i move away from it the more it moved to the left.
If i adjust for the closer position, then will be well off at middle and far. If I adjust for the far position, then it’ll be well off when it’s close to mirror 2.

I feel like im going back and forth and I’m not even sure if it’s even possible to align it across the frame…

I’m feeling so frustrated that i want to trow it out of the window… :rage: