i missed this thread when it was originally posted. i have 2 moonlite controllers, one of which would exhibit some strange behavior as described by the OP - the focuser position as reported by the driver would sometimes jump to the max or the min in the middle of a run… i sent that controller back to Ron and he sent me a new one, but i’m not 100% convinced it was the controller hardware that’s bad. it seems like this only happens to me when using certain USB and/or power configurations, but i’ve never gotten to the bottom of it. at any rate the 2 that i’m using now seem to be less susceptible to the problem.
i do know that in the particular configuration i’ve got going now, on cold boot the focuser controller does not respond to the first command sent to it. however, after that first command it does wake up and start interacting with the computer. so there could be some bugs in the AVR programming in the controller, or maybe it’s USB enumeration related… just not sure.