JPS61193022A - Z-phase encoder home position device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a Z-phase encoder, and particularly a home position device for a Z-phase encoder suitable for use in FA equipment requiring simultaneous multi-control and high-precision control. Regarding.

[Background of the invention]

Regarding the magnetic two-phase encoder, please refer to Japanese Patent Application Laid-Open No. 59-59.
Although Japanese Patent No. 14 has been proposed, it is related to a magnetic sensor, and the present invention is different from the above-mentioned patent because it relates to a function of a conventional Z-phase encoder.

[Purpose of the invention]

An object of the present invention is to provide a Z-phase encoder that is inexpensive and easy to adjust.

[Summary of the invention]

In order to always output a Z-phase signal at a certain base point of the output shaft of a two-phase encoder, the present invention provides a detection target on the same straight line as a certain base point on the output side of the rotary shaft, such as a keyway or a flat cut part. The Z-phase generating part of the body is attached. With this configuration, when a Z-phase encoder is connected and attached to a rotating shaft of a motor via a coupling, etc., the Z-phase encoder will always have a Z value at a certain reference point on the output side.
Since a phase signal is output, precise control is easily possible.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG.

Figure 1 is a front view of the encoder body.
and a rotating shaft 2. Here, the rotating shaft 2 has a keyway 2A machined on its output side as shown in FIG.
As shown in FIG. 3, a flat cut portion 2B is machined on the opposite side of the output shaft on the same straight line as the center line of the keyway.

Next, FIG. 4 shows a configuration diagram of a Z-phase encoder equipped with a home position function according to the present invention.

The rotary disk 8 is fixed so that the rotary disk fixing screw 7 is positioned at the flat cut portion of the rotary shaft 2 of the encoder, and the optical detector 4, the waveform shaping circuit board 5, and the board support stand 3 are placed between the rotary disk 8. Deploy.

If each component is arranged as described above, a two-phase signal will inevitably be output if the keyway 2A is at the top on the output side of the rotating shaft 2.

However, with conventional products, it was unclear at what position on the encoder body the output shaft came to output the Z-phase signal.

That is, since the relative positional relationship between the Z-phase signal and the mounting side was not determined for each product, adjustment work at the time of device installation was troublesome. Furthermore, variations in accuracy also become a problem because adjustments had to be made for each product.

Therefore, according to this embodiment, there are always two base points on the mounting side.
Since the phase signal is output, there is no need to make adjustments each time, even when connecting to the rotating shaft of a motor.
There is an effect that highly accurate control is possible simply by matching A.

FIGS. 5 and 6 show a rotating disk 8 that is one of the components of the embodiment described above. As can be seen from the figure, the slit for the Z-phase signal generation source and the screw hole for fixing the rotating disk are formed on the same straight line.

This is an example of an optical two-phase encoder, but as shown in FIGS. 7 and 8, the Z-phase signal generation slit and the rotary disk 9 are Similarly, the fixing screw holes are on the same straight line, and as shown in FIG. The same is true for .

As mentioned above, by making the Z-phase generating part of the object to be detected and the fixing screw hole on the same line, the output side of the rotating shaft and the output of the Z-phase signal inevitably match, so assembly and adjustment work can be omitted. There is.

〔Effect of the invention〕

According to the present invention, since the Z-phase signal is output at a fixed reference point on the side, there is an effect that no adjustment work is required when incorporating the Z-phase encoder into a device.

Furthermore, since no adjustment work is required, highly accurate products can be provided without variations from product to product.

[Brief explanation of the drawing]

Fig. 1 is a front view of an encoder main body showing an embodiment of the present invention, Fig. 2 is a sectional view taken along ■-■ in Fig. 1, Fig. 3 is a sectional view taken along -■ in Fig. 1, and Fig. 4 is a sectional view taken along -■ in Fig. 1. A fifth block diagram of a Z-phase encoder with a home position function showing an embodiment of the present invention.
The figure is a front view of a rotating disk according to an embodiment of the present invention, FIG. 6 is a side sectional view of the same, FIG. 7 is a front view of a rotating disk for gloss as another embodiment of the present invention, and FIG. A side sectional view, FIG. 9, shows a magnetic drum as another embodiment of the present invention. 1... Encoder main body, 2... Rotating shaft, 2A...
・Keyway 9.2B... Plane cut part, 3... Waveform shaping circuit board holding member, 4... Optical detector, 5... Waveform shaping circuit board, 6... Encoder cover, 7... Rotation Disk fixing screw, 8... Rotating disk, 9... Rotating disk for optical type, 10... Magnetic drum.

Claims (1)

[Claims] 1. In a Z-phase encoder consisting of a detection object, a detected object, and a waveform shaping circuit, the rotation axis is set so that a Z-phase signal is always output at a certain base point on the installation side of the Z-phase encoder. A home position device for a Z-phase encoder, characterized in that a Z-phase generating portion of the object to be detected is mounted on the same straight line as a certain reference point on the output side of the encoder. 2. In the description of claim 1, the optical Z-phase encoder is configured such that the detection object is an optical detector and the detection object is a rotating disk. A home position device for a Z-phase encoder, characterized in that a Z-phase slit of a rotating disk is attached. 3. In the statement of claim 1, the magnetic Z-phase encoder is configured such that the detection object is a magnetic sensor and the detected object is a magnetic drum, and the magnetic A home position device for a Z-phase encoder, characterized in that a Z-phase magnetized portion of a drum is attached. 4. In the statement of claim 1, the Z-phase generation portion of the detected object, which is a component of the Z-phase encoder, and the screw hole for fixing the rotating shaft of the detected object are formed on the same straight line. This is a home position device for a Z-phase encoder.