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Mitsui Seiki

Mitsui Seiki built eight HMCs to machine the James Webb Space Telescope mirror segments at Axsys Technologies Inc. They combine a massive structure with the ability to position to within a few microns anywhere in the 2000 × 1500 × 980-mm X, Y, Z machining envelope. Based on Mitsui Seiki's HS6A HMC, Axsys' machines were modified to fit the task. "These are very large, heavy machines and the components are substantial," says Scott Walker, president, Mitsui Seiki USA Inc. "The column weighs 11 tons and the bed is 20 tons."

The machines also needed to position and travel in a very ...

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