Originally Posted by
mike_Kilroy
pix 016 shows the 2 bds4 servo drives. one on right has the encoder equiv output white molex connector hooked up (to left most connector - also has little extra connector on it with blue jumper wire in it on same cable) - this is the 'Servo drive Fdbk signal.' that the control seems to be saying is missing.... if it is, you can see this on your cnc screen if you move motor by hand - the position feedback won't change on the axis when you move it....
but the drive on the left has nothing plugged in?? sometimes scales are added to machines for better feedback; perhaps you DO have a scale on that axis? If not, see if that connector fell out? maybe it was loose, but if it fell out the machine would give this error none stop... so confusing.... but alt least you can start looking in te right places.