Apparatus for determining magnetic head wear

Details Apparatus for determining magnetic head wear Apparatus for determining magnetic head wear

1997-07-07

1999-07-27

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

360137, G11B 500, G01R 3312, G01N 2772

Patent

active

059296321

ABSTRACT:
A magnetic recording and/or reproduction apparatus which is low in load to a CPU for calculating measurement data of a projection amount of a magnetic head and is small in capacity required for a non-volatile memory for storing resulting values of calculation of the CPU includes a measurement instrument for measuring a position and a projection amount of a magnetic head held on a rotary drum, a digital circuit for converting the position and the projection amount into digital data in response to a reference signal generated for each rotation of the rotary drum, a memory for storing initial values of the position and the projection amount, and a CPU for comparing the initial values stored in the memory with the rotational position and the projection amount measured by the measurement instrument. The CPU compares the projection amount measured by the measurement instrument with the projection amount stored in the memory only when the position measured by the measurement instrument and the initial value of the position stored in the memory are equal to each other.

REFERENCES:
patent: 5729133 (1998-03-01), Sakai et al.

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