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These models form contour boundaries with energy forces required for the particular region of interest.
John Fletcher, Ex-Cell-O's North American sales manager for special products, explains that if you looked at a scroll produced by a conventional machine, you would see "glitches" along the form contour. These disappear in parts produced by the XHS milling machine because the C axis eliminates profile errors as the linear X axis changes direction.
The pounds 3,500 device contains three pads of tiny pins, which form contours corresponding to an area on screen.