When using G Series Microscribe arms:

We have seen issues with power management settings on the USB ports of newer computers, those that have USB 3.0 ports rather than USB 2.0. Can have a tendency to drop the home of the Microscribe causing the LED on the back of the machine to flash green. The way some of the newer USB ports manage power to attempt to be more efficient causing brownouts in the power supplied to the MicroScribe.

 To troubleshoot this:

1. Plug the MicroScribe into a powered USB hub,
2. Connect a powered USB 2.0 hub to the computer at a USB port.
3. See if the unit continues to un-home.

This should resolve most homing problems with the Microscribe.
If further issues persist contact support.