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Problem running projects, it stops engraving/cutting near the top of the workarea

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Laser
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2023-05-06

I have a Lasermatic 10, 10W laser engraver and I’m running Lightburn 1.4.00. Lately, the projects haven’t been completing properly. The laser seems to be turning off when it should be engraving/cutting. It previews correctly in Lightburn. I ran a project twice with pretty much the same results. I slightly modified the second one to see if it made a difference but it did not. I have attached the 2 Lightburn files and 2 images files of what actually happened. The top of the tree is missing and some of the hinge cuts are also missing. I am using 3mm Basswood. I’ve seen similar issues when engraving am image on white tile where part of the image is not engraved. Any idea what could be happening? The laser is connected to a Dell laptop.
C

    • Jen

      2023-05-08
      This can be due to the laser driver shutting down due to overheating, in which case the laser mechanics continue moving. It may cool sufficiently to engrave part of the remaining sections, then overheat and shut down again.

To diagnose that, lay down some scrap material / paper / cardboard and, using the same pattern, set the laser set to maybe 10% power: enough to be visible, but not enough to generate much waste heat. If the design completes successfully (perhaps without making much of a mark), then the laser head is running too hot at full power.
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