Hey guys, First thread and build.. and it's not on a good note unfortunately. So I bought my OX build and TinyG a few weeks back now and had everything working with a few bugs which I will also post about later, but tonight I had just copied another users Ox/TinyG settings in via Chillipeppr and started jogging my X axis and then I hear my USB disconnect... I look over- the fan is still going hard but all the lights are now off on the TinyG... 24v still on the input and a big 12v fan sucking air through the board. I checked all ICs and all cool to touch and nothing shorted. Does this happen much? All I had done today was - set up my Touch plate (which I need to discuss in another thread) - added an external reset momentary switch to the outside of the TinyG box - put a 3v solid state relay off the SPin/Gnd pins to switch a 12V relay to turn on the spindle when activate - Upped max speeds on all axis The latter is when this happened and just like when I first powered the whole kit up the stepper would start to run then seem to jam up hard and make bad noises? This happened on all axis when I had really fast settings in at the start. What causes that? Any way any help would be much appreciated. Mitch