Quote Originally Posted by irving2008 View Post
As long as the steppers are not powered at the time... if you can turn them by hand then its safe to unplug them... I wouldnt recommend trying it when they are powered up. Normally the control box can be powered but the system is halted in standby, which is not the same as stationary but enabled (when the motors are locked). But as Jazz says, if in doubt, don't.
Irving this is a TB based pile of rubbish board and it will die if so much has looked at in a funny manner so ya can bet ye last dollar it will DIE even in halted state with the slightest spike. . . . Rich it will 100% DIE if steppers powered up and you unplug. . . Just turn it off it's honestly not worth the risk for the 20 seconds you'll save.!!