First, I highly recommend chilippepr. It works flawlessly (for me anyway). I was experiencing problems with randomly losing connection to my controller but I fixed it by replacing the USB cable that came with my X-Carve with one that has a ferrite core at each end. I haven’t had it fail one time since. BTW, one of the symptoms was that if I just ran a saw or drill press in my shop, it would lose connection. Anyway, I bought this cable: https://www.amazon.com/gp/product/B008VOPCGY.