My Gen 6 is locking up, typically (but not always) on longer prints.
The little netbook running the show hasn't had anything new added to it.
Ponterface won't respond (think that will be my first change, since it cheap) I usually have to kill it, then unplug/replug the USB cable. then restart ponterface.
(I have a few RAMPs on the way, thinking it will be a better route)
