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Method and apparatus for correcting for systematic errors in timing pattern generation

机译：校正定时模式产生中的系统误差的方法和装置

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Improvements in placement of timing patterns in self-servowriting include correcting for systematic errors due to geometric effects. A correction is made for varying systematic errors, such as when the recording head has spatially separate read and write elements. Further, servopattern rotation due to residual or unmeasured systematic errors is reduced by using a once per revolution clock index derived from the motor drive current waveform or any other sensor. In one aspect of correcting for systematic errors in the writing of timing patterns on a storage medium of a storage device, a time interval between a trigger pattern written at a first radial position of the storage medium and a rotational index is measured. The rotational index is related to the rotational orientation of the storage medium with respect to a fixed frame of the storage device. The location of another trigger pattern to be written is shifted, using the measured time interval to determine the shift in location for the another trigger pattern.
机译：自我伺服写入中时序模式放置的改进包括校正由于几何效应引起的系统误差。针对诸如记录头具有在空间上分离的读取和写入元件的变化的系统误差进行校正。此外，通过使用从电动机驱动电流波形或任何其他传感器得出的每转时钟指数一次，可以减少由于残留或未测量的系统误差引起的伺服模式旋转。在校正在将定时图案写入存储设备的存储介质上的系统错误的一个方面中，测量在写入介质的第一径向位置处写入的触发图案与旋转指数之间的时间间隔。旋转指数与存储介质相对于存储设备的固定框架的旋转取向有关。使用测得的时间间隔来确定要写入的另一个触发模式的位置，以确定另一个触发模式的位置移动。

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