The job stops at random times, with either the Lightburn message prompt that the usb connection is lost, sending me to the troubleshooting page of Lightburn ( ) or no message at all, just the console displaying the “port already in use” error. Lightburn is connected to the laser, it can control it, homing and moving around are good, problem starts when I try to engrave or cut, so either “Fill” or “Line” settings in Lightburn. The board installation and setting up in Lightburn was done accordingly to the specs found on this site documentation pages. My laser is properly grounded (checked with a voltmeter), on a separate electrical circuit from any other device, including the power for the C3D board or the computer, the usb cable is screened and filtered, connected via a usb hub with additional power in it, short lenght cable, so no problems there. I bought a K40 Julong laser with an M2 controller, bought the Cohesion3D board, changed it inside the laser and I’m trying to work with it via Lightburn.
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