Thank you for your replies. I have spent a week on and off checking the wiring to the Longs info. Checked every bit of wiring for continuity. Yes I have 5v to 0v drop as suggested. I have noticed this morning that the normal 2/3 4/5 6/7 pin out is not lighting the Z and X diode on the BOB when signaling from Mach. These axis are wired to A and Aux. Stupid of me not to notice that before. Never take things for granted. Will be checking the RS232 pin signals later. At the moment whatever pins I enable in config I cannot activate Z and X on the BOB. So probably got a duff BOB here.