There are two USB connection methods in LightBurn:
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Packet/USB - Uses a built-in driver, similar to RDWorks. Works on most systems, but has been fussy on some.
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Serial/USB - Uses an external “virtual serial port” driver. This one is usually installed on systems already, but not always. You can download the driver from FTDI’s site here: https://ftdichip.com/Drivers/VCP.htm