Appeal No. 1998-2498
Application No. 08/603,696
determines once during manufacture the switching position and records that position in a
permanent memory. Since the switching position is known to the drive controller,
calibration of transducer position during an initialization procedure is easily enabled. Thus,
accurate transducer position is achieved without requiring absolute position accuracy of a
sensor switching point.
Representative independent claim 5 is reproduced as follows:
5. A method for calibrating a position sensor for an object, the method
comprising the following steps:
a. moving the object with a controller;
b. sensing when the sensor switches from a first state to a second
state, the position of the sensor relative to a reference position being
unknown;
c. measuring the position of the object relative to the reference
position with a precision calibration fixture when the sensor switches from
the first state to the second state; and
d. recording the position of the object in a memory device readable
by the controller, thereby enabling the position of the object relative to the
reference position to be accurately known.
The examiner relies on the following references:
Alsborg et al. (Alsborg) 5,491,595 Feb. 13, 1996
(Filed Sep. 09, 1992)
Fornoff et al. (Fornoff) GB 2,265,719 Oct. 06, 1993
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