American Machinist

High speed and efficiency in an unusual package. (Machine of the Month).

THE COSMO CENTER PM-600 IS A high-efficiency die/mold machine that integrates operations for cutting complicated shapes. It operates continuously and tackles high-speed machining as well as sculptured surfaces.

The machine is efficient reports its manufacturer, thanks to its fast spindle speeds and acc/dec rates (328 ft/min). These keep noncutting time to a minimum. A six-axis control, which is a feature of the parallel-mechanism design, provides a high degree of freedom and integrates operations. The parallel-mechanism design also eliminates the need for guideways.

The 7-kW, 30,000-rpm spindle is controlled by expanding or contracting six supporting ballscrews. Each ballscrew is integrated with a hollow servomotor and a hollow rotary encoder developed for the parallel mechanism as a drive-and-position-detection unit. …

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