I keep getting “There was a problem sending data to the laser. The machine may be busy or paused.” I resolved the problem once by changing out the USB port on the laser. Now I am getting the same massage. I uninstalled LightBurn/reinstalled. Laser says it is ready. Tried changing from auto to com. Still nothing. Runnining windows 11. RUIDA 80w.
You tricked Windows. Nice move. However, Windows has total control over the USB ports.
From another posting of mine…
I have found, more often than I like, that Windows will not release the COM port when you disconnect or turn off the laser. It is a Windows thing.
Sometimes plugging in the powered up laser and unplugging it (USB) will clear it. Sometimes I had to power down the laser and restart Lightburn.
For a while, I had a really bad time with my SF-A9 laser. The solution there was to shut everything down, boot the PC, launch Lightburn, turn on the laser, and then plug in the USB cable. I never did figure out what I was doing to make this happen, but I must have finally quit doing it.
Bottom line is Windows did not release the COM port and you have to correct for that.
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