Possible lens issue on my diode OLM3?

LightBurn Hardware Compatibility Ortur Lasers
1

Hi forum, I’m starting to pull the little hair I have left soon if I can’t solve this :slight_smile:

I have OLM3 (ORTUR LU2-10A 10W Laser Module)
Running with lightburn since ~1 year and been working solid, now coming with a problem I’ve not encontered before.

So I recently started to see ‘shadowing’ when cutting / higher power. As you can see in the pictures, I’ve checked the belts / nuts and screws and I can’t feel anything that is out of normal. Alignment is good aswell.
I was considering the lense so I did cleaning, I opened up and cleaned it both ways. Are there more lenses / mirrors further in by any chance?

When I engrave/fill it works like a charm, even when I pull down the power and write texts or such, then it wont show up (perhaps not enough power to shadow/reflect?)

EDIT:
It’s 1 pass, 99% power, 3mm plywood.
As you can see, it’s giving a second line and it drives me nuts.

Lens issues perhaps
Lens issues perhaps1920×2550 531 KB

Possible wrong with lense
Possible wrong with lense1920×2550 427 KB

2

Not sure if this helps with some more information.
Sometimes I wonder if it’s mechanical, and sometimes I still think it’s lens.

The engraving on the black slate here, it’s done with 5800 mm/m, 90% power. I see no issues / shadowing or such. But this is engraving from one side to the other, back and fourth.

The cutout on a piece of 3mm ply I just did is 200mm/m with 99% power, 1 pass. Here you can see the ‘extra’ line, any clue? Lens? Some screws I’m missing? Faulty laser?

Thanks <3

PXL_20241117_095721060
PXL_20241117_0957210601920×2550 709 KB

PXL_20241117_095639019
PXL_20241117_0956390191920×2550 520 KB

3

Most likely, it is. :slightly_frowning_face:

This thread covers pretty much the same problem and should help pin down the solution:

1 Like
4

Thanks!

And something that baffles me here is that I see no shadowing after cutting this piece out. Not sure if it has something to do that it’s straight line and not curve/circling. I’ll test that aswell.

But clearly something is off. I will take another look at belt, nuts, pullyes etc. And also check that guide aswell you linked.

Test below is how I place it and the result. Ideas?
I used 1000mm/min and 50% power.

PXL_20241117_133111709
PXL_20241117_1331117091920×2550 377 KB

PXL_20241117_133000491~2
PXL_20241117_133000491~21920×1446 352 KB

5

So, i found one lose nut on the pulley.
At the moment i cant see any shadowburns either but Ill try other things later where this was visible before.

Your guide you linked to are great by the way, thanks for helping me out. All the best!

This picture is a new test when Ive tightened the nut on the pulley.

PXL_20241117_142440198
PXL_20241117_1424401981920×1446 277 KB

6

There’s no need for spendy plywood and you should scale the pattern to the full size of the platform, but the machine definitely has mechanical slop.

Use that test pattern to verify the results of your hunt for the loose screw / eccentric wheel / sloppy belt / whatever.

Hold that thought until the machine runs the test pattern without any distortion and I predict you will no longer be baffled. :grin:

1 Like
7

Oh, i took it from the size it was when i opened it :face_with_hand_over_mouth:
Ill runt it on a test trash wood in a full size aswell :+1:

Thanks alot :grinning:

8

You gotta have an Amazon box around there! :grin:

9

Well that made it hell easier! Yes I do :stuck_out_tongue: I’ll engrave on that, haha. Thanks :slight_smile: