Off centre design

LightBurn Software Questions
1

Hello

I’m facing an issue and i have no idea why, hopefully someone might help.

I use an ortur 20w in a wood box, and everything is aligned inside.

I just engraved my logo on a finished leather card holder, but the logo didn’t burn in the middle of the item, and honestly I’m pretty pisssed off.

I did a rectangular 10cm x 8cm which is the card holder measurements.
Positioned the corner at the 2x2 mark on the software and item on the same position on the table.
Did a frame test, and it seemed pretty much in the middle.
Came up moved on the side.
I then moved the logo to the right of the frame, and tested a piece of card board before ruining another item. That came up in the centre.
Black is the first one, blue is the second on with logo been moved to the right…
Any ideas?
Thanks

20231107_143752
20231107_1437521920×1920 314 KB

20231107_143843
20231107_1438431920×1920 471 KB

20231107_143914
20231107_1439141920×1920 545 KB

2

Take a full screenshot of LightBurn with your design loaded and ready to burn. Try to keep everything in LightBurn as it was when you did the burn.

3

Hi berainlb,

I can take a screenshot as it is now with the logo moved to the right is that helps?

4

That’s fine.

5

Hi
I have attached the screenshot as requested.
That is the position in lightburn, that actually worked on the item.
As you can see is not in the centre, but came out fine on the item…

Cardholder
Cardholder1366×768 114 KB

.

Cheers

6

Can you make “Laser” window visible in the screenshot?

Also, note that you have the rotary enabled. In that case, are you sure that you homed the laser properly when you did the burn?

7

Yes It was homed properly to 0

Cardholder2
Cardholder21366×768 116 KB

8

In the first screenshot you don’t “Show” the T2 layer. What does that look like?

Did you review the rotary setting?

Also, what is your framing process?

9

T2 is from a previous item position, so I turned that off, instead than delete.
Rotary settings are shown, and I normally use the first frame button, the one with the square.
PS I have now turned the rotary off

Cardholder3
Cardholder31366×768 155 KB

Usually I do a file with multiple design on different layers, then turn off the one i don’t need, like the coasters example attached, and I never had the image on the coaster burning off centre

Coasters
Coasters1366×768 162 KB

10

When you ran the frame, did the frame go around the entire card holder or just the position of the design itself?

11

Just the position of the design. Frame for T1 & T2 were both off

12

So ultimately are you saying that where the burn happened didn’t correlate to the boundary of the frame? And the frame was limited to the design shapes. That would be very unusual.

Are you able to recreate the issue now?

If so, can you upload the .lbrn file for review?

13

Let me see if I can explain, I clicked on frame button, and the laser framed where the logo should be, not around the all card holder.
I think if T2 was on it should have framed the all perimeter, which actually correspond to the card holder size.
I can try another cardboard piece tomorrow , with same measurements, then upload the file.
Thanks for trying to sort it out :+1:

14

No, in your screenshot, you can see that you turned off framing for the T1 and T2 layer. So, they are never framed.

15

Hi berainlb,

Just done another test, first with rotary off, then another one with rotary on.

Both times the logo burned in the right position… :confused:

Burn-test.lbrn2 (64.3 KB)

Burn-test
Burn-test1366×768 127 KB

Burn-test.lbrn2 (64.3 KB)
Burn-test2
Burn-test21366×768 128 KB

Maybe it was a glitch?

I’ve uploaded the two files as well as screenshots

Cheers

16

Likely not a glitch as these are quite repeatable.

I’m guessing some unaccounted variable that may no longer be apparent or relevant.

17

What does that mean “variable”?
It can happen any time? Not exactly ideal… I might try a piece of cardboard as i did now, and work fine, but then might mess up the leather card holder…

18

No. I mean just the opposite. This should be deterministic.

There may have been something in the workflow at that moment or something in the design/settings that was changed in that run that is no longer true or apparent. However, it’s difficult to go back in time to identify that.

19

Well, let’s hope it does not play up again. I really don’t want to ruin another piece.

Cheers

20

I wrote some description of my personal preferred way of aligning objects, it’s described here: Coordinate systems & workpiece alignment - Diode Laser Wiki (scroll down to “simple method”). This works fine for me every time and is very fast and easy to do :slight_smile: (Of course, that might not be the perfect way for everyone :slight_smile: )