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This cylindrical drive system has optical drive system (ODS) technology to add efficiency to EDM operations. The linear shaft motor places the permanent magnets into a stainless steel shaft and moves the forcer coils into a single unit surrounding the shaft. The shaft can then use 100 percent of the magnetic flux—a full 360 degrees around the permanent magnets. This is a much more efficient system as compared to a flat plate type linear drive, as it only exposes half of the magnetic flux to the face of the coils, which then require more energy to generate the same movement, which in turn generates more heat. Video courtesy of Mitsubishi EDM.