目前,磁盘装置的磁头定位时间一定要缩短。几年前,继在日本首次提出磁道伺服系统之后,作者又研制了FACOM 472L DPU,其中采用了所谓音圈马达。 现在,作者又试制成性能更高的音圈马达以及它的控制系统,其静动态性能见表1。这些成果已应用于FACOM 477K磁盘装置(FACOM 477K与IBM 3330相容)。 At present, the head positioning time of the magnetic disk device must be shortened. A few years ago, following the first proposed track servo system in Japan, the author developed the FACOM 472L DPU with a so-called voice coil motor. Now, the author tries to make a higher performance voice coil motor and its control system, the static and dynamic performance in Table 1. These results have been applied to FACOM 477K disk devices (FACOM 477K and IBM 3330 compatible).