Trying to create a simple array of rectangles that are 13-inches wide by 8-inches in height.
Using ZERO x and y spacing so that I can optimize and reduce cuts.
After selecting a 4 x 4 array, the corners of the rectangles are NOT exactly lining up and the optimize tool doesn’t reduce cuts.
Where is your “job origin”? it could be that the reason but i am not sure.
If you’re willing, please share a picture of what you’re seeing so someone can help you.
Job Origin:
This is a typical corner:
Optimization Settings:
Array Settings:
It worked on a previous project.
Settings look same as in the past.
So I just took the old project, saved it under a new name, deleted everything except one rectangle, changed the dimensions, then built an array and it now works.
Sounds strange, can you send the file?
It is very strange and I have no explanation for it, when I open your file I can see what you mean. If I delete all squares except the first one and try to make a grid array with 6x2 I get the same result as you with the distance between the parts. More strange is my lightburn sesion is going down, I’ve tried it twice in a row. If I make your project from new then there are no problems, it indicates that there is something with your file. I have sent a crash raport for investigations to Lightburn`s Beta Group, of which I am a part.
Something is definitely wrong with the file or form. I couldn’t understand exactly what, but I’ve already made several changes to the rectangle, and the problem when creating the array persists. In a newly created rectangle the problem disappears.
It took me a while to find the error, even though it was right in front of my nose.
If you set the square to X,Y 0:0 and zoom all the way in, you will see that it tilts a little bit. However, the deviation is so small that (I) it cannot be corrected manually. Whether it’s a “problem” LightBurn has, I won’t be able to say.
You achieve the fastest and best result by drawing a new square and using the array function afterwards.
Just to add to what @bernd.dk said - see picture
Fine visualization 
, how have you been able to measure it?, in Lightburn’s measuring function it says it’s 90 degrees.
I did it in Draftsight - a CAD program.
…it’s cheating 
Ohhh, it’s good !!, I’ve never noticed it thanks for this tip
I first saw it in Lightburn, but sometimes it is easier to look at angular dimensions that are accurate 
Good catch - I came to the same conclusion and then saw that you beat me to it.
@MisterTFM You can also use the “Align to angles” option of the Edit Nodes tool to fix this. After clicking to enable the Edit Nodes tool, hover over any line segment of the rectangle and press “A” - that aligns any line to the closest horizontal, vertical, or 45 degree angle.
… I intentionally did not recommend that because I did not succeed.(for my)
That is odd - it worked perfectly for me.
