Is there a real fix for the issues with the connection and “laser 100% busy” ? even after laser is unpluged from the PC. the laser works fine with GRBL??? brand new to this, spent 1 1/2 day trying to conect and engraved 3 little test pannels now I can"t even get the laser to react with Lightburn, very frustrating.
90% of the communications issues are due to a super cheap USB cable, like the one they ship with the laser. Replace it with a quality one that has a ferrite suppressor (big knot) on it.
The other 10% is a missing CH340 driver, wrong USB port selected, too long of a USB cable, Device Type not set up properly, other software already has the port, and a few others I can’t remember. The fact that you did 3 test panels rules out these except the too long one and other software (reboot everything and only launch Lightburn).
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The most common solution is to toggle the „enable DTR signal“ option in device settings.
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I am thinking this is a works/ does not work option. I have never seen the DTR (Data Terminal Ready) signal allow it to work sometimes (“engraved 3 little test pannels”) and not others. But I could be wrong…
DTR did the trick.
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