REPRODUCER OF MAGNETIC RECORDING MEDIUM
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申请人：KANOOPUSU DENSHI KK
更多信息请下载全文后查看
专利内容由知识产权出版社提供
专利名称：REPRODUCER OF MAGNETIC RECORDING MEDIUM
发明人：YAMADA KOJI,TAKEMOTO AKIRA 申请号：JP17218984 申请日：1984 0817 公开号：JPS6150220A 公开日：19860312
摘要：PURPOSE:To reproduce a magnetic recording medium accurately and at a high speed with no labor and time required by revolving the magnetic recording media at the same speed by means of the disk drive devies set at the read and write sides with coincidence always secured among relative rotary positions of index holes of those magnetic recording media. CONSTITUTION:The magnetic recording media A and B at the original and copy sides respectively are attached to the collets and spindle hubs of the disk drivers 1 and 2 at the read and write sides respectively. A drive motor 2a of a rotary drive part n, and a comparator 4 detects the relative positions of the index holes of both media A and B. If a shift is detected between both index holes, the voltage change is converted into the current change via a driver 2f of the driver 2. Thus the current of the motor 2a is controlled and the revolutions of the motor 2a are controlled. As a result, the coincidence is secured between the relative positions of both index holes. This secures synchronization of the rotary angular speeds of both media.
更多信息请下载全文后查看
专利内容由知识产权出版社提供
专利名称：REPRODUCER OF MAGNETIC RECORDING MEDIUM
发明人：YAMADA KOJI,TAKEMOTO AKIRA 申请号：JP17218984 申请日：1984 0817 公开号：JPS6150220A 公开日：19860312
摘要：PURPOSE:To reproduce a magnetic recording medium accurately and at a high speed with no labor and time required by revolving the magnetic recording media at the same speed by means of the disk drive devies set at the read and write sides with coincidence always secured among relative rotary positions of index holes of those magnetic recording media. CONSTITUTION:The magnetic recording media A and B at the original and copy sides respectively are attached to the collets and spindle hubs of the disk drivers 1 and 2 at the read and write sides respectively. A drive motor 2a of a rotary drive part n, and a comparator 4 detects the relative positions of the index holes of both media A and B. If a shift is detected between both index holes, the voltage change is converted into the current change via a driver 2f of the driver 2. Thus the current of the motor 2a is controlled and the revolutions of the motor 2a are controlled. As a result, the coincidence is secured between the relative positions of both index holes. This secures synchronization of the rotary angular speeds of both media.