I’ve seen other posts about this topic but no definite answers. I’ve been using LB for 3 or 4 years now and never had this issue until about a month ago. After this happens sometimes I get an error that says the software is having trouble connecting to the device after I reselect the com port. I replaced the USB cable but the problem still comes up, though it is intermittent. I do not have the problem in xTool Studio, so I’m thinking it’s something in LB. I hope there’s a solution because I like LB a lot more than Studio!
and…
Were there any Windows updates around that time? The USB communications operations is mostly a Windows thing, not Lightburn or other software.
There is a big difference in the effects of any COM issues depending on where or not you are streaming or sending short batches. Lightburn uses streaming to fill the controller buffer. This helps facilitate continous motion with the laser. I am not sure about xTool Studio, but a lot of the packages send one line at a time to the controller and then pause for a response.
Other things that can cause a communications loss:
- Bad/loose USB on board connector (I had one fall off the controller board!).
- Power supply dropout (line voltage drop, bad connection or sudden power demand).
- External radio signal interferrence (computer, nearby transmitter, or large motor).
This list is not everything but is the most likely causes.