Hi all Doug here. I'm new to the forum, just hope I can get some fixes. I have a Probotix Fireball V90 which works very well. However, it was cutting just fine yesterday and today as soon as I pulled up Mach3 it always comes up where you have to reset. That is standard. Today was no exception. After loading my g-code and ready for a cut, I turned the controller on and the reset came on again. I clicked at least 10 times and finally it reset. I got everything ready for the cut, started and behold it was working. Unfortunately I had to stop and ref-all. It got half way back to home, reset came back on saying "limit switch triggered" and has yet to reset all day. Usually, I can turn the controller off then hand move all three axis, reset hit ref-all and it all works but not this time. The only thing I'm not good at is going into Mach3 settings and wondering if I change something I won't know how to fix back again. I bought this machine used and already put together so it's all a mystery to me. I have both manuals from Probotix and Artsoft, but nowhere does it have anything on trouble shooting. Can anyone give me a clue and thanks for anything. I'm 77, cncing for 6 years, hand routing with a palm router since 2005. Cnc is a God send for me I love it. Thanks Doug