Force feedback using either the workpiece or the spindle mounted force gage improved the fidelity of the grooves machined in S7 steel samples. The error was reduced from 16 μm to less than 2μm over the 80 μm deep, 20 mm long grooves. The limit of the correction using this technique has not been determined but nonlinear effects between force and deflection will ultimately set the best possible compensation.
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