1. In a spark erosion machine having a spark erosion electrode and a workpiece, a method for controlling an inter-electrode distance between said spark erosion electrode and said workpiece across a machining gap during a feed control operation independent of a jump control operation in a spark erosion process in the spark erosion machine having the spark erosion electrode (F) and the workpiece (W), the method comprising the steps of: providing a logic device; feeding at least two parameters (.delta., Inst) whose variation is known to influence a currently prevailing state of the spark erosion process to the logic device (5) in order to generate at least one output signal (.epsilon.) of the logic device; controlling at least one of the parameters (.delta.) with a controller based upon the output signal of the logic device with the aid of rules stored in the logic device, according to the laws of fuzzy logic, said at least two parameters (.delta., Inst) corresponding essentially to one common currently prevailing state of the spark erosion process, the rules stored in the logic device (5) determining how one of the fed parameters (.delta.) is to be varied when another (Inst) of the fed parameters varies, and the controller (6) varying the parameter (.delta.) to be varied in such a way that the currently prevailing state of the spark erosion process is at least approximated to a currently desired state of the spark erosion process to perform the feed control operation.