My issue is print cut doesn’t align. The middle cuts are perfect but toward the outsides they are off.
My registration marks are a .15 thick cross with a dot in middle. It will cut the upper left registration mark out perfect but bottom right one is off a fair amount. Pics and video below. They are about 25” apart from each other
I have calibrated the x and y axis across the whole bed st full distance. 1000mm x 600mm and it’s perfect now.
Tried scaled and not scaled. Nothing changes. Cuts are off exactly the same for every sheet I cut. It’s leather patches that are printed.
Ideas bc I have about 50 sheets to cut.
My alignment to registration is perfect as well laser dot is in center of my alignment dot as I pulse the laser to check instead of the red dot on laser
I’m out of ideas here Tried rehoming before setting print cut alignment marks always the exact same outcome
I can do a sheet of the same prints on a piece of paper 8.5x11 and use the exact same registration mark size and it cuts those patches almost exactly perfect.
Also when I measure between the registration marks in light burn and I measure them on the large print they are within. 1/8mm difference measuring by hand.
So I don’t get why is skewing so bad. On the larger sizes prints
We’ve seen a case where an overly elaborate target shape wasn’t properly set up, so that the LightBurn center wasn’t at the eyeballometric center. As a result, selecting the target in the LightBurn workspace produced an off-center alignment, even though the optical center of the target was in the correct spot.
Verify that selecting those crosses-with-dots behaves the way we all think it does: the selection center should be symmetric around the cross with the center point exactly at the dot, even when zoomed in as far as you can stand.
As a cross-check:
Select a target
Duplicate it
Mirror the duplicate both horizontally and vertically
If the duplicate doesn’t exactly overlay the original, then something is kaflooie.
Take my left top registration mark and mirror it vertically to make it go to my top right. Then select again and mirror it horizontally to make it go to the bottom right?
I didn’t measure out the registration marks at all just placed in in the top left and on in the bottom right. No rhyme or reason to placement. Nothing states there has to be a specific location
More info.
Multiple files created as well not just one. Created files the same way as well as different way to test.
Tried w different laptops as well as my computer.
Job is started from light burn and all done from there.
Select first mark and align in laser then click set. Click jog and then use machine controlled to jog to second mark. The. Select second mark and set it. Tried scaled and U scaled.
Also tried doing all movements from light burn as well.
I can do the same file on a smaller scale size of a sheet of paper the it cuts almost perfect but not exact. Very very close thought. Move up to a 12x24 and it’s way off. If I make it cut the registration marks either the lower right or the upper left is always off. One will cut right on top of the marks and the there will cut way off. I forgot to take a picture. Amount of which about what I am off on my cuts if my patches or fake patches on test paper so I’m not wasting papers.
Went back and did another 600x1000 square and cut it and still it’s at exactly 600x1000. Check the level of bed again as well. Same bed is spot on
Did a dish at cut across the bed and the distance from point a to point b is spot on.
So not sure. How about someone else make me a file that had 5-6 square it what ever that’s 12x24 and use your registration marks and save the file how you do it and I’ll see how it cuts.
I have tried. PDF, svg, ai, dxf. Tried separating cut file from designs file. Always starting from scratch not just saving the same file out as something different. Results are always the same.
I can purposely miss register the alignment marks but just a tad and I still get almost identical results.
Or maybe I can send my file to someone and have them try it on some scrap paper or something.
The third target is the first one, mirrored on both axes, and looks about the same.
Overlaying the two shows they’re not the same.
Now, I don’t expect this to be the case with your targets, but let’s rule it out before looking for other problems.
For my layouts, I made one target, put it in the Art Library, then drag it out whenever I need it. That ensures all the targets are identical, which would surely not be the case if I drew each one on the fly.
Normally I only use a single dot for registration marks and have the lines well away from it. So not sure how it could be misaligned when it comes to that or when I mirror as it’s a circle and small. May be wrong in my thinking though as I’m so lost at the issue up to now
I thought you selected the cross and depended on having the dot centered in the cross. Now you select only the dots, but also cut out the crosses?
The misalignment looks like a mismatch between the LightBurn target selection in the workspace and the physical location of the laser at the target. For example, if the cross is made up of separate ungrouped lines and you (inadvertently) select the leftmost line of the upright, rather than the dot, that will cause exactly the misalignment in the bottom picture.
Do this on cardboard larger than the leather:
Draw a rectangle with corners at the target positions, using a framing square to get good right angles
Put the cardboard on the platform & focus as usual
Load the file into LightBurn
Delete the target crosses, leaving only the centered circles
Put the circles on a layer that will mark (not cut) cardboard
Do the Print and Cut dance with target circles and cardboard rectangle
Fire The Laser to mark the circles
Are the circles properly aligned at the corners of the cardboard rectangle?
I only made the cross so i could visually find the dot in the middle better. I just had the cross’s on a cut layer so i eft them to see how they cot. I dont actually use the cross for anything other than for visual reference. I use the tiny dot that i have in the very middle of them.
The laser platform in the picture looks like it’s in a big CO₂ machine, so that’s what I’ve ben assuming you’re using, but your profile says “Xtool d1”.
If it’s a different machine, you can re-do your equipment description through the link at the bottom of the License Management dropdown at the top right of the forum. Let us know more about the machine, too, as the details matter.
If it is, in fact, an xTool laser, then their … quirky … G-Code implementation causes all manner of problems. In that case, I must defer to the folks around here with more experience.
Incorrect xTool PnC alignment is apparently common:
Always place your registration marks as far apart as possible DIAGONALLY so that M1 (Mark 1) is as close to 0,0 as the material allows and M2 is as close to x max, y max that is safely within the material area.
