Unfortunately the whining you guys hear when the machine is idle are the steppers trying to hold their position. It is a side effect of the stepper drivers we are using (Allegro A4988)
After 5 minutes the motors will release automatically, but as @blairrocks mentioned, pressing Alt + R will release the motors immediately. Once released, the V-One will have to re-home and run the switch sequence again.
For what it’s worth, this issue has been addressed in the latest batch of units (different stepper drivers) but unfortunately we don’t have a backwards compatible solution.