when this machine looses it's memory it's a bear to start over. We have to reinstall all the parameters but in that the machine has to be zeroed and it just takes off and crashes one axis or another. We turn the machine off and manually push one axis or another but it just hit or miss. My repair guy has been at it for many hours now. You can't just zero one axis and zero another and zero the rest, the machine must to each in it's own order.