So I am using Lightburn with my OMTech MF1220-50 engraver. I have been working on a layered project which up until today has been going pretty good. I turned on my laptop and when I opened Lightburn which told me that there was a new version out there, 1.2.01. I downloaded and installed it. I was going to do another cutout layer of my project which had some engraving on it. When I started the first part which is the engrave for that, I was getting a tripple image. (sorry, not sure how to post pics in here so I put them on my website and am posting the links to them). The first picture link is the screenshot of what the layer should be. The red is the engraving for the layer and the black is the cut. Lightburn screenshot image. This is a picture is how it came out on my bed. I stopped it before it got too far, but you can clearly see it was doing a tripple image. The workpiece on the laser bed.
Is there added permissions need to post pictures in a topic?
Attached is the lightburn file. I should add that this is 5 different layers. Some are just cut layers and some have engraving and a cut. I did layer 2,3,4 and 5 on an older version of Lightburn and didn’t have any trouble. Also, I created the file on my desktop machine which is a linux PC, but the computer that I run the jobs from is a Windows laptop. That shouldn’t make a difference I would think since layers 2, 3, 4 and 5 went just fine.
This is using a ruida controller. There is no g-code. Besides even on my diode laser I don’t save the gcode first. I send it directly from lightburn to the machine. Same thing with my CO2 using the ruida controller.
To tell you the truth I din’t see that it was set to 3 passes. Not sure how that got set to 3. The odd thing is that is the only layer that is set that way. But even being set to 3, shouldn’t it just engrave the fish and go over the top of it for the other two passes? Why is it shifting the layer over each time? The other thing that is strange is that it started engraving the fish way too far over from where it should have been.
It should have started a little right of center. Regardless, I will change the passes to 1 and set it to bi-directional like all the other layers and test again.
Hi Dan, It will be interesting to see what difference bi-directional makes. I have a couple of questions…
-With settings as they were (including the 3 passes), if the layer 1 fill setting is changed to “Fill all shapes at once” - do you still get the triple image problem?
-Looks like the “phantom shift” is about half the width of each individual shape - if you replaced the fish with 3 circles each with an offset, of different sizes (but put all in in one group). (But leave all settings the same including “Fill shapes individually”) would you get the effect in this pic on the bottom row? If so, please share the project file, a pic, and a screen shot of the preview showing traversal moves also.
Could you also please share a screen grab of your Optimization settings.
I have an OMTech red and black. It homes to the rear right. I’m assuming yours homes to the rear left. I wanted to run your file without too much modification. The optimization settings are in the lower right of the laser window.
