Servo circuit
First Claim
1. A servo circuit for controlling the positioning of a servo object under servo control to a target position by switching from speed control to position control in the vicinity of the target position, comprising:
- speed detection means for detecting a real speed based on position signals transferred from a servo head, said speed detection means including a speed detection gain adjustment unit;
speed error detection means for generating an error between a target speed and the real speed;
position error detection means for generating a position error signal based on the position signals;
switching means for switching the connection of the servo object between said speed error detection means and said position means; and
main processing means for generating the target speed in accordance with the position signals from the servo object and controlling the switching of said switching means, said main processing means measuring the intervals between the position signals, and changing the detection gain of said speed detection gain adjustment unit in accordance with the measured value of the intervals.
3 Assignments
0 Petitions
Accused Products
Abstract
A servo circuit having a speed detection circuit for detecting a real speed from a position signal from an object under servo control. A speed error detection circuit generates an error between a target speed and the real speed. A position error detection circuit generates a position error signal from the position signal. A switching unit switches connection of the servo object to the speed error detection circuit and the position error detection circuit. A main processing unit controls the switching of the switching unit. Near the target position, speed control by the speed error detection circuit is switched to position control by the position error detection circuit. A speed detection gain adjustment unit is provided in the speed detection circuit. The main processing unit measures the intervals between the position signals and, based on the measured value, changes the detection gain of the speed detection gain adjustment unit.
18 Citations
10 Claims
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1. A servo circuit for controlling the positioning of a servo object under servo control to a target position by switching from speed control to position control in the vicinity of the target position, comprising:
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speed detection means for detecting a real speed based on position signals transferred from a servo head, said speed detection means including a speed detection gain adjustment unit; speed error detection means for generating an error between a target speed and the real speed; position error detection means for generating a position error signal based on the position signals; switching means for switching the connection of the servo object between said speed error detection means and said position means; and main processing means for generating the target speed in accordance with the position signals from the servo object and controlling the switching of said switching means, said main processing means measuring the intervals between the position signals, and changing the detection gain of said speed detection gain adjustment unit in accordance with the measured value of the intervals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification