Electronic device, operation method and recording medium

Patent metadata

Field	Value
Publication number	US-11203209-B2
Application number	US-202016803605-A
Country	US
Kind code	B2
Filing date	Feb 27, 2020
Priority date	Feb 28, 2019
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

An electronic device includes a moving body, first and second sensors, and a processor. The first sensor detects the moving body passing a reference position while moving along a first axis. The second sensor outputs a second phase signal of a second phase according to the moving body moving along the first axis, wherein the second phase is shifted from a first phase. In a setting mode, the processor stores information data indicating a level of the second phase signal at a time when the first sensor detects the reference position. In an operation control mode, the processor sets, as a position pertaining to an origin on the first axis, a position of an earliest edge of the first phase after the second phase signal switches from a level identical with the level stored in the setting mode to a different level after the first sensor detects the reference position.

First claim

What is claimed is:

1. An electronic device comprising:
a moving body that moves along a first axis;
a first sensor that is fixed to a point corresponding to a reference position on the first axis, and detects that the moving body has passed the reference position while moving along the first axis;
a second sensor that is disposed so as to move as the moving body moves, and includes a first component and a second component that detect an amount of movement of the moving body from the reference position along the first axis as a first rectangular signal and a second rectangular signal phase-shifted from the first rectangular signal, respectively; and
a processor that:
in a setting mode, stores setting data indicating whether a level of the second rectangular signal detected by the second component of the second sensor at a time when the first sensor detects that the moving body has passed the reference position is a high level or a low level; and
in an operation control mode, sets, as a position pertaining to an origin on the first axis, a position where a level of the first rectangular signal detected by the first component of the second sensor switches first after the first sensor detects that the moving body has passed the reference position and after the second rectangular signal detected by the second component of the second sensor switches from a level identical with the level indicated by the setting data to a different level.

2. The electronic device according to claim 1 , wherein the second rectangular signal has a phase difference of substantially 90 degrees from the first rectangular signal.

3. The electronic device according to claim 1 ,
wherein the setting mode includes a first setting mode and a second setting mode, and the operation control mode includes a first operation control mode and a second operation control mode, and
wherein the processor:
in the first setting mode, stores first setting data indicating whether a level of the second rectangular signal detected by the second component of the second phase sensor at a time when the first sensor detects that the moving body has passed the reference position, the moving body moving in a first direction along the first axis, is a high level or a low level;
in the first operation control mode, sets, as a position pertaining to a first origin on the first axis, a position where a level of the first rectangular signal detected by the first component of the second sensor switches first after the first sensor detects that the moving body has passed the reference position, the moving body moving in the first detection, and after the second rectangular signal detected by the second component of the second sensor switches from a level identical with the level indicated by the first setting data to a different level;
in the second setting mode, stores second setting data indicating whether a level of the first rectangular signal detected by the first component of the second sensor at a time when the first sensor detects that the moving body has passed the reference position, the moving body moving in a second direction opposite to the first direction along the first axis, is a high level or a low level; and
in the second operation control mode, sets, as a position pertaining to a second origin on the first axis, a position where a level of the second rectangular signal detected by the second component of the second sensor switches first after the first sensor detects that the moving body has passed the reference position, the moving body moving in the second detection, and after the first rectangular signal detected by the first component of the second sensor switches from a level identical with the level indicated by the second setting data to a different level.

4. The electronic device according to claim 1 ,
wherein the moving body has an inkjet head that moves along the first axis and a direction that intersects with the first axis, and
wherein the electronic device proceeds to the setting mode in response to replacement of an ink cartridge or starting-up of the electronic device.

5. An operation method that is performed in an electronic device including: a moving body that moves along a first axis; a first sensor that is fixed to a point corresponding to a reference position on the first axis, and detects that the moving body has passed the reference position while moving along the first axis; and a second sensor that is disposed so as to move as the moving body moves, and includes a first component and a second component that detect an amount of movement of the moving body from the reference position along the first axis as a first rectangular signal and a second rectangular signal phase-shifted from the first rectangular signal, respectively, the operation method comprising:
in a setting mode, storing setting data indicating whether a level of the second rectangular signal detected by the second component of the second sensor at a time when the first sensor detects that the moving body has passed the reference position is a high level or a low level; and
in an operation control mode, setting, as a position pertaining to an origin on the first axis, a position where a level of the first rectangular signal detected by the first component of the second sensor switches first after the first sensor detects that the moving body has passed the reference position and after the second rectangular signal detected by the second component of the second sensor switches from a level identical with the level indicated by the setting data to a different level.

6. A non-transitory computer-readable recording medium storing a program executable by a processor of an electronic device including: a moving body that moves along a first axis; a first sensor that is fixed to a point corresponding to a reference position on the first axis, and detects that the moving body has passed the reference position while moving along the first axis; and a second sensor that is disposed so as to move as the moving body moves, and includes a first component and a second component that detect an amount of movement of the moving body from the reference position along the first axis as a first rectangular signal and a second rectangular signal phase-shifted from the first rectangular signal, respectively, the program allowing the processor to:
in a setting mode, store setting data indicating whether a level of the second rectangular signal detected by the second component of the second sensor at a time when the first sensor detects that the moving body has passed the reference position is a high level or a low level; and
in an operation control mode, set, as a position pertaining to an origin on the first axis, a position where a level of the first rectangular signal detected by the first component of the second sensor switches first after the first sensor detects that the moving body has passed the reference position and after the second rectangular signal detected by the second component of the second sensor switches from a level identical with the level indicated by the setting data to a different level.

Assignees

• Casio Computer Co Ltd

Inventors

• Nagao Tomoyuki

Classifications

• A45D29/22 Primary

  Finger-supports · CPC title

• B41J3/4073 Primary

  Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects (B41J3/283, B41J3/286 take precedence; building up a 3D object using individual droplets from jetting heads B29C64/112) · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title

• B41J2/01

  Ink jet · CPC title

• B41J19/202

  Drive control means for carriage movement · CPC title