Hi All, I purchased a project on Etsy and opened the project which had a height of 3.958" and I kept lightburn open while I burned 28 of the items and all worked well. I closed lightburn. I pulled down a new Etsy project, opened it to have a look and realized I needed two more of the last project I was working on. I imported the last project again only to find that the height of the project was 4.527 inches … I did not think an SVG could chang its’ height … .is there something in Lightburn that might cause this to happen?
Many folks have inadvertently clicked one of the Enable Rotary buttons, without a rotary. That will change the Y axis scaling to whatever the default rotary settings might be, which are typically different than the linear settings.
If it’s now enabled, disable it.
It’s possible you had inadvertently enabled the rotary some time ago, have been running happily with whatever scaling it produced, just now turned it off, and suddenly things are different.
If fiddling with the rotary swich doesn’t change the situation, then other things come into play, but we’ll burn that bridge when we come to it.
Good Morning! Thank you for the prompt response! I do have and use a rotary with my laser and after double checking this morning the rotary is disabled and I would tell you it has been since its last use.
There is a setting for SVG Import sizing. It is either 72 or 96 DPI, but the math on your situation doesn’t match up with that difference. The difference in the settings is 75%. If that were the issue the new size would be 5.276. See here.
OK, that’s the easy one … 
Next comes the SVG import DPI setting, which is more difficult to change inadvertently. What can happen: if the SVG setting was wrong, you imported it as SVG (and didn’t notice the incorrect size), then imported it as, say, DXF with the correct size. In that case, it will have different X and Y dimensions, but an arbitrary design doesn’t really start with known dimensions anyway.
A difference between Import and Open may be significant. After you finish setting up the layer parameters and Save the job as a LightBurn *lbrn2 file, you should Open it, because importing either the original SVG (DXF / whatever) or the LightBurn *lbrn2 file will strip off all the layer settings. If you adjusted the size, tweaked the settings, then saved the LightBurn file, importing the design will put you back to the start.
So: take a look at the different techniques you may have used to go from the purchased design to the finished LightBurn project and see if something fell off the rails along the way.
Tim! Thank You! I think you may have hit the nail on the head! Last week I was going through the documentation that came with the project and it suggested modifying the import settings!!! And I may have changed them inadvertantly because I remember opening that in lightburn to take a look!!! Thank You! I will take another look at it to see if by changing that the size goes back to what it was originally
And just in case you are wondering what difference it makes, for the first time since owning my laser I cut a jig for gluing up and sanding these pieces. Of course I cut it when I had the original project open. After closing and (perhaps modifying the import size) the jig was no longer the correct size! Thank You Again
Accuracy is one of the things a laser is very good at… when everything is set correctly and the machine is in adjustment.
Size matters, LOL
Yes it does
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