发明名称 |
Eccentricity compensation in a web handling system |
摘要 |
A control system compensates for web tension variation caused by a first spool, (A) determines rotational frequency of the first spool; (B) determines variation in rotational velocity at the second spool which occurs at the (A) first spool frequency; (C) determines the rotational position at the first spool corresponding to the (B) variation in rotational velocity at the second spool; (D) calculates a drive motor profile for the first spool which tends to cancel the (B) variation in rotational velocity at the second spool; and (E) superimposes the (D) drive motor profile on a first spool drive motor at the (C) determined rotational position of the first spool.
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申请公布号 |
US6831801(B2) |
申请公布日期 |
2004.12.14 |
申请号 |
US20020075260 |
申请日期 |
2002.02.15 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
CHLIWNYJ ALEX;DAVIS DAVID MICHAEL;SWANSON DAVID LEE |
分类号 |
G11B15/18;G11B15/43;(IPC1-7):G11B15/43 |
主分类号 |
G11B15/18 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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