在超精密切削、磨削、特种加工中，大行程驱动与高精度进给是难以解决的矛盾，也是多坐标超精密加工的难点。
On ultra precision cutting, grinding and non-traditional machining, there is a hard problem between long travel and high precision, especially in multi-coordinate machining.
又由于油膜具有均化作用，可以提高进给精度，在较长的行程上可以达到纳米级的定位分辨率。
Also because the lubricant film has the homogenization, may increase to feed precision, may achieve a nanometer level in the long traveling schedule the localization resolution.
研制成两类任意行程、微步距进给驱动装置。
Two kinds of random stroke, nano meter feed mechanism have been developed.
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