hi!
I often found a loose wire in the encoder connector.. you just open the little carter on the first axis motor and check connections..
@ zanelee
maintenance -> origin -> mechanical
release the brake (if i remember... put a "1" on the axises you want to make origin, press death man + "x+" + another button in the head of teach pendant.. try.. and the brakes release.. after put "1" on axises to make origin and OK..)
you have to move the axes in the mechanical stop.. every axis to + or -.. check manual or try (and move slow!)
this is my first message! sorry for my english.. i'm italian and i worked for 5 years only in robotic assistance.. abb mitsu kuka and otc
bye