MPCNC Laser with SKR PRO and Marlin

LightBurn Software Questions
1

I am sorta new to using lasers and Lightburn. About a year ago it was working perfect. I think I was running version 0.9.09. I decided to start playing with my laser again. I upgraded to the latest version of Marlin 2.0.7.2. I also upgraded to Lightburn 0.9.20 and purchased a license. For some reason I am getting a bunch of “Unknown Commands” back and it is stopping the burn. Sometimes it pauses on its own and I have to click resume from my LCD. Any help is greatly appreciated. Below is my console output:
Starting stream
Layer C00 Pass 1 of 3
echo:Unknown command: “M8”
echo:Unknown command: “S0”
echo:Unknown command: “<�1”
echo:Unknown command: “S0”
echo:Unknown command: “�2G1X-1.87”
echo:Unknown command: "�91 S0"
echo:Unknown command: “�”
echo:Unknown command: “�� S51”
echo:Unknown command: “sg7�M03 P1 S0”
echo:Unknown command: “�1X2.67”
echo:Unknown command: “MM03 P1 S0”
Connection lost
Stream completed in 0:08
echo:Unknown command: “4V.78”
ok

2

One that pauses:
Layer C00 Pass 1 of 3
echo:Unknown command: “M8”
echo:Unknown command: “3 F0”
echo:Unknown command: “aI7”
echo:Unknown command: “�I7”
echo:Unknown command: “S51”
echo:busy: paused for user
echo:busy: paused for user
echo:busy: paused for user
echo:busy: paused for user
echo:busy: paused for user

3

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