Issue with ComMarker B4 30W laser engraving stopping mid cycle

LightBurn Hardware Compatibility Commarker
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1

Hi all. I’m new to this. I have Lightburn Pro 2.0.05 on a new MAC mini running Tahoe 26.3. I have a ComMarker B4 30W laser and I’m trying to engrave brass coins. The engraving stops after a short time (varies) and then resumes red-light scanning, but no further engraving occurs.

Here is a video demonstrating the issue: https://drive.google.com/file/d/1B42BCKsmu_BrwSYsSKls9mygO-Zy9kU-/view?usp=sharing

I have tried the following:

  • Simple engravings rather than 3D sliced, still has issues, it seems to be the time the laser is running rather than what it is running.
  • Changed the stock USB cable to a new one, and added ferrit cores to the power and USB leads to minimize any interference.
  • Tried an external powered USB for Mac Mini (otherwise it has been connected directly in with a USB-C converter.

Once the job stops engraving, I can still click cancel in Lightburn, and it finishes the task (without finishing the job). So I’m not sure it’s a USB problem.

The only thing I have left to try is perhaps switching the lens, but this unit is brand new so I’m not sure if that will have any issue.

2

This reads like an overheat issue. New laser, reach out to the manufacturer.

3

I have to agree with @MikeyH about a likely overheating issue. Most of the fiber machines will stop if they overheat. Along with a good reason to contact the vendor and ask.

Assuming it works OK if you let it sit a while, time too cool down? You’re also using pretty high power from the looks of it, maybe a reduction in power for a limited time to test the machine out.

:grinning_cat:

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