Identifying and regulating the starting behavior during electrochemical machining of workpieces

A method for electrochemical machining of a workpiece, wherein at least one electrode is situated adjacent to a surface to be machined and current pulses are generated in pulsed operation to ablate material from the workpiece, and wherein before and/or at the beginning and/or during an electrochemical ablation, data of the current pulses are registered and analyzed to identify a starting phase or a transient phase comparable to a starting phase and/or to regulate a spacing of the electrode to the surface to be machined and/or a current flow during the starting phase or the transient phase comparable to a starting phase, and wherein the spacing of the electrode to the surface to be machined and/or of the current flow is regulated by setting a feed of the electrode in a direction of the surface to be machined and/or by setting an applied potential as manipulated variables, a regulation comprising a linearization and decoupling of the manipulated variables, the applied potential U being defined by

• U
• =
• v
• 2
• ⁡
• (
• R
• +
• x
• κ
• ⁢
• ⁢
• A
• )
• +
• Δ
• ⁢
• ⁢
• U
• ,
• and/or the feed V being defined by
• V=κv2−v1,
• wherein R is a total resistance of a system, x is the spacing of the electrode from the surface to be machined, κ represents electrical conductivity, A represents a working surface area of the electrode, ΔU represents an overvoltage, and v1 and v2 are virtual manipulated variables, v1 corresponding to a control variable of the spacing of the electrode from the surface to be machined and v2 corresponding to a control variable of a current strength.