Figure 11: Half symmetrical sketch of the acting forces and their Cartesian components on the surface of an oblique wire. The angle of the slope is indicated by λ. The feed direction is represented by sfeed. The line load q(φ0) describes the load along the wire circumference. For a specific φ0, the normal force dFN(φ0) at the incremental contact point is represented in perpendicular direction to the wire surface. The tangential wire surface is described by the tangent tWire and the rotation axis of the wire cWire. The friction force dFR acts in the direction of tWire. The forces dFN(φ0) and dFR(φ0) are also given in their Cartesian components.