I just bought and received the Sainsmart 3015-MX3 cnc machine that runs MACH3.  I installed the software and can get the X,Y and Z axis to move but can not get the spindle to turn nor can I get it to run the G Code.  I have searched through YouTube and can not get the answers I need to get this thing to work, so that is why I am posting here.  Can someone help or even point me in the right direction?