I've been having an issue with my iMach3 P2-S pendant since I installed it. Basically, the thing works great. I love it.
However, it seems to stop working randomly. I can use it for anywhere from a minute to hours when it seems reset back to the LinuxCNC screen and stops working with LinuxCNC. I've tried unplugging the USB cable and reattaching it, but it doesn't seem to help.