Actuator tip calibration for robotic optical storage system

• US 10,529,371 B1
• Filed: 10/29/2018
• Issued: 01/07/2020
• Est. Priority Date: 10/29/2018
• Status: Active Grant

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Smith, Daniel F., Altknecht, David Jame
• Primary Examiner(s): Miller, Brian E
• Application Number:
  US16/173,975
• Time in Patent Office: 435 Days
• CPC Class Codes: G11B 17/04 Feeding or guiding single record carrier to or from transducer unit guiding during transducing operation G11B17/34
• CPC Class Codes: G11B 17/05 specially adapted for discs not contained within cartridges
• CPC Class Codes: G11B 17/225 wherein the disks are transferred from a fixed magazine to a fixed playing unit using a moving carriage

Abstract

A calibration system includes a moveable arm configured for movement within an optical disc storage system. A disc kicker device includes an actuator and an actuator tip that contacts an optical disc. The disc kicker device is connected to the moveable arm. The calibration system performs a calibration operation to calibrate the actuator at the actuator tip to correct displacement error.

Claims

1. An apparatus comprising:

a moveable arm configured for movement within an optical disc storage system;

a disc gripper device coupled to the moveable arm;

a disc kicker device including an actuator and an actuator tip that contacts an optical disc, the disc kicker device is coupled to the moveable arm;

a calibration system configured to;

determine a displacement error between the actuator tip and the optical disc, and perform a calibration operation to calibrate the actuator at the actuator tip to correct the displacement error.

2. The apparatus of claim 1, wherein the calibration system includes a position sensor that measures position of the actuator tip relative to the position sensor.

3. The apparatus of claim 2, wherein the position sensor is an optical sensor that registers location of a base of the actuator with respect to position of an optical disc.

4. The apparatus of claim 2, wherein a switch of the calibration system detects position of the actuator tip upon depression of the switch based on movement of the moveable arm causing the actuator tip to depress the switch.

5. The apparatus of claim 2, wherein an optical proximity sensor of the calibration system detects the position of the actuator tip based on movement of the moveable arm causing the actuator tip to activate the optical proximity sensor.

6. The apparatus of claim 2, wherein the calibration system includes an electrical circuit that detects the position of the actuator tip that closes the circuit based on movement of the moveable arm.

7. The apparatus of claim 2, wherein the calibration system includes a driven electrical element that is used to detect position of the actuator tip upon movement of the moveable arm that causes the actuator tip to modify measured capacitance of the driven electrical element.

8. The apparatus of claim 2, wherein the calibration system includes a mechanical stop that is used to detect the position of the actuator tip based on movement of the moveable arm that causes the actuator tip to contact the mechanical stop and measurement of a change in force.

9. The apparatus of claim 1, wherein a mechanical stop of the calibration system provides for the actuator tip to pass the mechanical stop upon being aligned and prevents the actuator tip from passing by the mechanical stop upon being misaligned.

10. The apparatus of claim 1, wherein during actuation the moveable arm position is corrected by a measured position of the actuator tip from the calibration operation.

11. A calibration system comprising:

a moveable arm configured for movement within an optical disc storage system; and

a disc kicker device including an actuator and an actuator tip that contacts an optical disc, the disc kicker device is coupled to the moveable arm,

wherein the calibration system;

determines a displacement error between the actuator tip and the optical disc, and performs a calibration operation to calibrate the actuator at the actuator tip to correct the displacement error.

12. The system of claim 11, further comprising a position sensor that measures position of the actuator tip relative to the position sensor.

13. The system of claim 12, wherein the position sensor is an optical sensor that registers location of a base of the actuator with respect to position of an optical disc.

14. The system of claim 12, further comprising a switch that detects position of the actuator tip upon depression of the switch based on movement of the moveable arm causing the actuator tip to depress the switch.

15. The system of claim 12, further comprising an optical proximity sensor that detects the position of the actuator tip based on movement of the moveable arm causing the actuator tip to activate the optical proximity sensor.

16. The system of claim 12, further comprising an electrical circuit that detects the position of the actuator tip based on the actuator tip closing the electrical circuit by movement of the moveable arm.

17. The system of claim 12, further comprising a driven electrical element that is used to detect position of the actuator tip upon movement of the moveable arm causing the actuator tip to modify measured capacitance of the driven electrical element.

18. The system of claim 12, further comprising a mechanical stop that is used to detect the position of the actuator tip based on movement of the moveable arm causing the actuator tip to contact the mechanical stop and measurement of a change in force.

19. The system of claim 11, further comprising a mechanical stop that provides for the actuator tip to pass the mechanical stop upon being in an aligned state and prevents the actuator tip from passing by the mechanical stop upon in a misaligned state.

20. A method of calibrating an actuator in an optical disc storage system, the method comprising:

actuating a moveable arm in the optical storage system;

measuring, by a processor, position of an actuator tip relative to a position sensor;

performing, by the processor, a calibration operation to determine a displacement error of the actuator; and

correcting displacement error during actuation of the moveable arm position to calibrate the actuator at the actuator tip, wherein the actuator tip contacts an optical disc in the optical storage system.