Every Doosan CNC is sent with a jumper on the E-Stop circuit. This is removed when the Bar Feeder is installed. This needs to be replaced when you take the Bar Feeder off. More than likely no one has replaced this wire now the E-Stop circuit is broken. Check in your Electric manual for the bar feeder E-stop circuit and it should give you the wire markers needed to be completed. If you can't find it let me know I will see if I have a manual with the correct wireing schematic.