JP5765646B2 - Encoder, encoder manufacturing method, drive device - Google Patents

Description

  Embodiments disclosed herein relate to an encoder, an encoder manufacturing method, and a drive device.

  Conventionally, a servo motor is used in a servo system such as a robot, a semiconductor manufacturing apparatus, or an NC machine tool, and an encoder is used to detect the rotational position and rotational speed of the servo motor. As such an encoder, for example, an encoder described in Patent Document 1 is known. In this encoder, the rotating disk and the hub are fixed with an adhesive.

International Publication No. 2007/020812 Pamphlet

  In the encoder manufacturing process, the rotating disk and the hub are aligned and fixed so as to be concentric, and then other processing is performed. Here, in the above prior art, the rotating disk and the hub are fixed with one type of adhesive. For this reason, due to the physical properties (curing time, adhesive strength, etc.) of the adhesive, there is a problem that the processing performed after the bonding is limited and the manufacturing process cannot be assembled freely.

  Accordingly, the present invention has been made in view of such problems, and an object of the present invention is to provide an encoder, an encoder manufacturing method, and a drive device capable of improving the degree of freedom of the manufacturing process. Is to provide.

In order to solve the above problems, according to one aspect of the present invention, a disk-shaped disk,
A rotating body having the disk bonded to the end face;
A first coating layer formed of a first coating agent formed between the disk and the end surface;
There is provided an encoder having a second coating layer formed between the disk and the end surface and made of a second coating agent having different physical properties from the first coating agent.

In order to solve the above problem, according to another aspect of the present invention, there is provided an encoder manufacturing method for manufacturing an encoder in which a disk-shaped disk is bonded to an end surface of a rotating body,
A first procedure for applying a first coating agent to the disk or the end face;
A second procedure for applying a second coating agent having different physical properties from the first coating agent to the disk or the end surface;
A third procedure for attaching the disk to the end face in a state where the first coating agent and the second coating agent are applied is applied.

In order to solve the above-described problem, according to still another aspect of the present invention, a movable body including a joined body in which a first adherend and a second adherend are joined by bonding is rotated. And a drive device that is driven in a predetermined motion type including at least one of reciprocating motion,
A first coating layer formed of a first coating agent formed between the first adhesive surface of the first adherend and the second adhesive surface of the second adherend;
A driving device having a second coating layer formed between the first adhesive surface and the second adhesive surface and made of a second coating agent having different physical properties from the first coating agent is applied.

  As described above, according to the present invention, the degree of freedom in the manufacturing process can be improved.

It is explanatory drawing for demonstrating schematic structure of the servomotor provided with the encoder which concerns on this embodiment. It is explanatory drawing for demonstrating schematic structure of the encoder which concerns on this embodiment. It is the figure seen from the disk side which extracts and shows the composition of the disk and hub of the encoder concerning this embodiment. It is a side view which extracts the structure of the disk and hub of the encoder which concerns on this embodiment, and shows it with a partial cross section. It is a flowchart showing the manufacturing method of the encoder which concerns on this embodiment. It is a side view which shows the structure of the comparative example which formed the 2nd application layer in the outer peripheral side of a hub in a partial cross section. It is the figure seen from the disk side which extracts and shows the composition of the disk and hub of the encoder concerning the modification which provides a slot between the 1st coating layer and the 2nd coating layer. It is a side view which extracts the structure of the disk and hub of the encoder which concerns on the modification which provides a groove | channel between a 1st application layer and a 2nd application layer, and shows it with a partial cross section. It is the figure seen from the disk side which extracts and shows the composition of the disk and hub of the encoder concerning the modification which provides a slot between the 2nd application layer and an outer edge. It is a side view which extracts the structure of the disk and hub of the encoder which concerns on the modification which provides a groove | channel between a 2nd application layer and an outer edge, and shows it with a partial cross section. It is the figure seen from the disk side which extracts and shows the composition of the disk and hub of the encoder concerning the modification which provides the slot for forming the 2nd application layer. It is a side view which extracts the structure of the disk of the encoder which concerns on the modification which provides the groove | channel for forming a 2nd application layer, and a hub, and shows it with a partial cross section.

  Hereinafter, the present embodiment will be described with reference to the drawings.

<1. Servo motor>
First, an outline of a configuration of a servo motor including an encoder according to the present embodiment will be described with reference to FIG. As shown in FIG. 1, the servo motor SM includes an encoder 10 and a motor M. The motor M is an example of a power generation source that does not include the encoder 10. Although the motor M alone may be referred to as a servo motor, in this embodiment, the configuration including the encoder 10 is referred to as a servo motor SM. The motor M has a shaft SH, and outputs a rotational force by rotating the shaft SH about the rotation axis AX.

  The motor M is not particularly limited as long as it is a motor controlled based on data detected by the encoder 10 such as position data. The motor M is not limited to an electric motor that uses electricity as a power source. For example, the motor M is a motor using another power source such as a hydraulic motor, an air motor, or a steam motor. There may be. However, for convenience of explanation, a case where the motor M is an electric motor will be described below.

  The encoder 10 is connected to an end portion on the opposite side to the rotational force output end of the shaft SH of the motor M. The encoder 10 detects the position (also referred to as a rotation angle) of the motor M (an example of a measurement target) by detecting the position (angle) of the shaft SH, and outputs position data representing the position. In addition to or instead of the position of the motor M, the encoder 10 includes the speed of the motor M (also referred to as rotational speed, angular velocity, etc.) and the acceleration a of the motor M (also referred to as rotational acceleration, angular acceleration, etc.). At least one may be detected. In this case, the speed and acceleration of the motor M can be detected, for example, by a process such as differentiating the position by 1st or 2nd order in time or counting the detection signal for a predetermined time.

  The arrangement position of the encoder 10 is not particularly limited to the example shown in the present embodiment. For example, the encoder 10 may be arranged so as to be directly connected to the output end side of the shaft SH, and is connected to the shaft SH or the like via another mechanism such as a speed reducer, a rotation direction changer, or a brake. May be.

<2. Encoder>
Next, the configuration of the encoder according to the present embodiment will be described with reference to FIG. As shown in FIG. 2, the encoder 10 includes a disc 30 connected to the end opposite to the output end of the shaft SH via a hub 20, and an optical module 40 arranged to face the disc 30. Have. The optical module 40 is mounted on a printed circuit board 50, and the printed circuit board 50 is provided on the encoder 10 or the housing 52 of the motor M via a spacer 51.

  The disk 30 is formed in a disc shape, and is arranged such that the disk center O substantially coincides with the rotation axis AX. That is, the disk 30 and the hub 20 are joined by bonding so as to be concentric, and the hub 20 is connected so as to be concentric with the shaft SH. Then, the shaft SH including the joined body of the disk 30 and the hub 20 is driven to rotate by the motor M.

  A slit array SA for detecting the position (angle) of the shaft SH is formed on the surface 31 of the disk 30 on the side facing the optical module 40. The slit array SA is formed as a track arranged in a ring shape with the disk center O as the center. The slit array SA has a plurality of reflective slits arranged along the circumferential direction over the entire circumference of the track. Each reflection slit reflects light emitted from the light source 41.

  In this embodiment, the disk 30 is made of glass, for example. The reflective slits of the slit array SA can be formed by applying a light reflecting member to the surface of the glass disk 30. The material of the disk 30 is not limited to glass, and metal, resin, or the like can be used. However, when using a metal or a resin that is not transparent, it is necessary to fix the disk 30 and the hub 20 by curing the adhesive other than light irradiation (for example, curing by heating) in the manufacturing process of the encoder 10 described later. There is. In addition, the reflective slit uses, for example, a metal having a high reflectance as the disk 30, and a portion that does not reflect light is roughened by sputtering or a material having a low reflectance is applied to reduce the reflectance. Or may be formed. However, the material and manufacturing method of the disk 30 are not particularly limited.

  The optical module 40 includes a substrate 42 that is disposed to face the disk 30. The board 42 is configured to be smaller than the printed board 50 and is disposed on the printed board 50. A light source 41 that emits light toward the disk 30 and a light receiving array (not shown) that receives reflected light from the slit array SA are provided on the surface of the substrate 42 facing the disk 30. Yes.

  In the example shown in FIG. 2, the encoder 10 is a reflective encoder. However, the encoder 10 is not limited to this, and is a so-called transmissive encoder in which the light source 41 is disposed so as to face the substrate 42 with the disc 30 interposed therebetween. Also good. In the example shown in FIG. 2, the disk 30 is fixed to the hub 20. However, the rotating body to which the hub 20 is attached is not limited to the hub 20. For example, the shaft of the motor M may be used. The shaft of an encoder connected to the shaft of the motor M may be used. However, a case where the disk 30 is fixed to the hub 20 will be described below.

<3. Configuration of the joint between the disc and the hub>
Next, the configuration of the joint between the disk and the hub of the encoder according to this embodiment will be described with reference to FIGS. 3 and 4. FIG. 4 also shows a partially enlarged view in which a part of the joint between the disk and the hub is enlarged. For convenience of explanation, the gap between the disk 30 and the hub 20 is exaggerated.

  As shown in FIG. 4, the hub 20 includes a shaft portion 21 connected to the shaft SH and a flange portion 22 having a larger diameter than the shaft portion 21. The disk 30 and the hub 20 are bonded together by bonding the surface 32 of the disk 30 opposite to the optical module 40 side and the end face 23 of the flange portion 22 of the hub 20 on the optical module 40 side. Between the disk 30 and the end face 23 of the hub 20, a first coating layer 101 made of a first coating agent and a second coating layer 102 made of a second coating agent having different physical properties from the first coating agent are formed. . In this example, the first coating layer 101 is formed in a circular shape at the center of the end face 23, and the second coating layer 102 is formed in an annular shape so as to surround the first coating layer 101. The surface 32 corresponds to an example of a first adhesive surface, and the end surface 23 corresponds to an example of a second adhesive surface.

  In addition, the aspect of the coating layers 101 and 102 is not limited above, For example, the 1st coating layer 101 may be made into a polygonal shape, and the 2nd coating layer 102 may be provided with two or more concentric circles. The second coating layer 102 does not necessarily have a continuous annular shape. For example, a plurality of small circular coating layers may be discontinuously arranged so as to surround the first coating layer 101.

  In the present embodiment, an ultraviolet curable adhesive that starts curing upon irradiation with ultraviolet rays is used as the first coating agent, and an epoxy resin two-component mixture is used as the second coating agent having different physical properties from the first coating agent. Use mold adhesive. Since the curing time can be adjusted by using an ultraviolet curable adhesive as the first coating agent, alignment is performed so that the disk 30 and the hub 20 are concentric before the adhesive is cured. And can be cured and fixed after alignment is complete. In addition, the two-component mixed adhesive used as the second coating agent starts polymerization, moisture absorption, condensation reaction, etc. by mixing and cures over a relatively long time. It does not hinder alignment. On the other hand, since the curing progresses with time and the entire adhesive is almost completely cured, the sealing function can be exhibited.

  The adhesive used for the first coating agent is not limited to the ultraviolet curable adhesive. For example, it is possible to use an adhesive that initiates a curing reaction due to external factors such as energy radiation including irradiation with light other than ultraviolet rays, heating, moisture in the air, and the like. Also, the adhesive used for the second coating agent is not limited to the above epoxy resin adhesive, and other two-component mixed adhesives such as acrylic resin and urethane resin can be used. Further, as the second coating agent, a one-component adhesive may be used instead of the two-component mixed type as long as the entire adhesive is cured almost completely. Furthermore, the second coating agent is not necessarily an adhesive, and for example, a liquid or paste sealant (silicon sealant or the like) mainly composed of silicon may be used.

  The ultraviolet curable adhesive used as the first coating agent in this embodiment corresponds to an example of the first adhesive, and the epoxy resin two-component mixed adhesive used as the second coating agent is a seal. It corresponds to an example of an agent and a second adhesive.

<4. Encoder manufacturing method>
Next, the manufacturing method of the encoder according to the present embodiment will be described with reference to FIG. In addition, the manufacturing method demonstrated here is performed by the control part (CPU) of the encoder manufacturing apparatus which is not shown in figure.

  First, in step S <b> 10, the control unit applies the first coating agent to the end surface 23 of the flange portion 22 of the hub 20 using a coating device (not shown). In the example shown in FIG. 3, the first coating agent is applied in a circular shape at the center of the end surface 23. Then, the process proceeds to step S20.

  In step S <b> 20, the control unit applies the second coating agent to the end surface 23 using a coating device (not shown) as in step S <b> 10. In the example shown in FIG. 3, the second coating agent is applied in an annular shape so as to surround the first coating agent. Then, the process proceeds to step S30.

  In the above description, the first coating agent and the second coating agent are applied in this order. However, the application order is not limited to this, and the second coating agent and the first coating agent may be applied in this order. . In the above description, both coating agents are applied to the end face 23 of the hub 20, but may be applied to the surface 32 of the disk 30, or one of the coating agents may be referred to as the hub 20 side and the other as the disk 30 side. Thus, you may divide an application surface for every coating agent.

  In step S <b> 30, the control unit attaches the disk 30 to the end surface 23 of the hub 20 in a state where the first coating agent and the second coating agent are applied to the end surface 23 of the hub 20 using an attachment device (not shown). Then, the process proceeds to step S40.

  In step S40, the control unit performs alignment so that the disk 30 and the hub 20 are concentric using an alignment device (not shown). That is, after the disk 30 is attached to the end surface 23 of the hub 20 in step S30, the first coating agent, which is an ultraviolet curable adhesive, is not cured until it is irradiated with ultraviolet rays in step S50 described later. Further, as described above, since the curing of the second coating agent, which is a two-component mixed adhesive, has not progressed, the disk 30 is adsorbed to the hub 20 by the surface tension of the first and second coating agents. However, it can move relative to the disk surface. For this reason, it is possible to adjust their concentric positions by adjusting the relative positions of the disk 30 and the hub 20 with the alignment device. Then, the process proceeds to step S50.

  In step S50, the control unit irradiates the joint between the disk 30 and the hub 20 with ultraviolet rays using an ultraviolet irradiation device (not shown). The ultraviolet light passes through the glass disk 30 and hardens the first coating agent, which is an ultraviolet curable adhesive. Note that the second coating agent is not affected by the ultraviolet irradiation, and thereafter cures with time.

  In this embodiment, since an ultraviolet curable adhesive is used as an example of the first coating agent, the ultraviolet light is irradiated in step S50. However, the present invention is not limited to this and depends on the type of adhesive. Can be performed. For example, when a photocurable adhesive other than ultraviolet rays is used, the light may be irradiated, and when a thermosetting adhesive is used, heating may be performed. That is, an external factor for initiating the curing reaction of the adhesive may be given.

  This flow is complete | finished above. The encoder 10 is manufactured by assembling the joined body of the disk 30 and the hub 20 joined by the control procedure described above, the optical module 40, and the like, and the manufactured encoder 10 is attached to the motor M. The servo motor SM is completed. However, the explanation about the assembly of the optical module 40 and the like and the attachment to the motor M is omitted.

  The disk 30 corresponds to an example of a first adherend, the hub 20 corresponds to an example of a rotating body and a second adherend, the shaft SH corresponds to an example of a movable body, and the servo motor SM is a driving device. It corresponds to an example. Step S10 corresponds to an example of the first procedure, step S20 corresponds to an example of the second procedure, and step S30 corresponds to an example of the third procedure.

<5. Examples of effects according to this embodiment>
In the encoder 10 of the present embodiment described above, between the disk 30 and the end face 23 of the hub 20, the first coating layer 101 made of the first coating agent and the second coating agent having different physical properties from the first coating agent are used. A second coating layer 102 is formed. Here, as the first coating agent, it is possible to cure the first coating agent at an arbitrary timing by using an adhesive that starts a curing reaction due to an external factor, such as an ultraviolet curable adhesive. For example, the disc 30 and the hub 20 can be subjected to, for example, a process that generates vibration after the bonding. Further, as the second coating agent, an adhesive that is almost completely cured with time without performing a curing process can be used to perform a process such as rotating the disk 30 and the hub 20 at high speed after bonding. It becomes possible. As described above, by using two kinds of coating agents having different physical properties, it is possible to suppress the processing performed after the bonding from being restricted due to the physical properties, and thus the degree of freedom of the manufacturing process can be improved.

  Further, when an ultraviolet curable adhesive is used as the first coating agent as in the present embodiment, it is difficult to completely cure as described above, and if there are many uncured adhesives, the high speed of the disk 30 and the hub 20 is high. It is also conceivable that the adhesive scatters during rotation. Therefore, by forming the second coating layer 102 so as to surround the first coating layer 101, the possibility of the adhesive scattering can be reduced, and the reliability of the encoder 10 can be improved.

  In addition, as a structure which forms a 2nd application layer so that the circumference | surroundings of a 1st application layer may be enclosed, the structure shown, for example in FIG. 6 can be considered. In this comparative example, the second coating layer 102 ′ by the second coating agent is not between the disk 30 and the end surface 23 of the hub 20, but on the outer peripheral side in the radial direction of the flange portion 22 of the hub 20. 24 and the surface 32 of the disk 30 are formed in contact with each other. In addition, the 1st application layer 101 is the same as that of the said embodiment. Even in this case, the possibility of scattering of the uncured first coating agent can be reduced by the sealing function of the second coating layer 102 ', but there are the following problems. That is, in the case of the comparative example, after attaching the disk 30 to the end surface 23 of the hub 20 in a state where the first coating agent is applied to the end surface 23 of the hub 20, the positioning is performed and the first coating agent is cured, The second coating agent is applied to the outer peripheral side of the flange portion 22 of the hub 20. For this reason, at the time of application, the second coating agent may accidentally adhere to a position corresponding to the slit array SA on the surface 32 of the disk 30, and in this case, the detection accuracy of the encoder 10 is lowered. . In contrast, in the present embodiment, since the second coating layer 102 is formed between the disk 30 and the end surface 23 of the hub 20, the second coating agent does not protrude to the outer peripheral side of the flange portion 22, and Does not cause such problems. Therefore, the reliability of the encoder 10 can be reliably ensured.

  In this embodiment, in particular, a two-component mixed adhesive is used as the second coating agent. As a result, the second coating layer 102 can exhibit both an adhesion function and a sealing function, so that the disk 30 and the hub 20 can be bonded as compared with the case where a simple sealing agent such as a silicone sealant is used as the second coating agent. Strength can be increased.

  In this embodiment, in particular, an adhesive that initiates a curing reaction by ultraviolet irradiation is used as the first coating agent. By using such an adhesive, it becomes possible to adjust the curing time, and the alignment is performed so that the disk 30 and the hub 20 are concentric before the adhesive is cured, and the curing is performed after the alignment is completed. Thus, the disk 30 and the hub 20 can be fixed. Further, by adopting such a fixing method, the disk 30 and the hub 20 can be fixed in a non-contact manner, so that it is possible to prevent a positional deviation from occurring during fixing.

<6. Modified example>
In addition, it is not restricted to the said embodiment, A various deformation | transformation is possible within the range which does not deviate from the meaning and technical idea. Hereinafter, such modifications will be described in order.

(6-1. When providing a groove between the first coating layer and the second coating layer)
As shown in FIGS. 7 and 8, a concave groove 25 may be formed at a position between the first coating layer 101 and the second coating layer 102 on the end surface 23 of the hub 20. Thus, when the disk 30 and the hub 20 are bonded, the groove 25 becomes a relief groove for the first coating agent and the second coating agent, and the surface 32 of the disk 30 and the end surface 23 of the hub 20 are more closely adhered to each other, and an unnecessary gap is formed. Can be eliminated and they can be prevented from contacting (mixing). As a result, the function (adhesion function) of the first coating agent and the function (seal function) of the second coating agent can be effectively exhibited without interfering with each other, and the reliability of the encoder 10 can be improved. it can. The groove 25 corresponds to an example of the first groove.

(6-2. When providing a groove between the second coating layer and the outer edge)
As shown in FIGS. 9 and 10, in addition to the groove 25 described above, a concave groove 26 may be formed at a position between the outer edge (end surface 24) and the second coating layer 102 on the end surface 23 of the hub 20. Good. Thereby, when the disk 30 and the hub 20 are bonded, the groove 26 becomes a relief groove for the second coating agent, and the second coating agent can be reliably prevented from protruding to the outer peripheral side from the joint portion between the disk 30 and the hub 20. . As a result, it is possible to reliably prevent the problems described in the comparative example from occurring and to ensure the reliability of the encoder 10. Further, like the groove 25 described above, there is also an effect that the surface 32 of the disk 30 and the end surface 23 of the hub 20 are more closely attached to eliminate unnecessary gaps. The groove 26 corresponds to an example of a second groove.

  In the example shown in FIGS. 9 and 10, the case where both the grooves 25 and 26 are provided has been described as an example, but needless to say, only the groove 26 may be provided.

(6-3. When providing a groove for forming the second coating layer)
As shown in FIGS. 11 and 12, a concave groove 27 is formed at a position corresponding to the second coating layer 102 on the end surface 23 of the hub 20, and the groove 27 is filled with a second coating agent to form a second. The coating layer 102 may be formed. Accordingly, the contact area between the second coating layer 102 and the hub 20 can be increased, so that the sealing function by the second coating layer 102 can be increased and the adhesive strength between the disk 30 and the hub 20 can be increased. .

  In addition, since it is necessary to form the 1st application layer 101 by an ultraviolet curable adhesive thinly so that ultraviolet rays may reach | attain, the structure filled in the above grooves is not preferable. However, since the second coating agent using a two-component mixed adhesive is cured by a chemical reaction by mixing, it can be cured almost completely even when formed thick, and there is no loss of solvent. The change in volume is small, which is suitable for filling the missing part. Therefore, it is possible to have a structure in which the groove 27 is filled as in this modification.

(6-4. Others)
Although the case where two types of coating agents having different physical properties are used has been described as an example in the above embodiment, three or more types of coating agents having different physical properties may be used. For example, three types of adhesives may be applied, or two types of adhesives and one type of sealant may be applied.

  Moreover, although the said embodiment demonstrated the case where it applied to the servomotor SM which drives the shaft SH provided with the conjugate | zygote with which the disk 30 and the hub 20 were joined by adhesion | attachment as an example of a drive device by rotational movement, Not limited to this. In other words, various drives can be used as long as a plurality of adherends are bonded together and the movable body including the bonded body is driven in a predetermined motion form including at least one of a rotational motion and a reciprocating motion. Applicable to the device. In particular, in the case of a driving device in which the movable body is driven at a high acceleration, the possibility of uncured adhesive scattering increases, which is preferable. Examples of such a driving device include an XY stage device that drives a slider to reciprocate in the X-axis and Y-axis directions by a linear motor. In such an XY stage device, a position detection device composed of a scale provided on the stator and a detection head provided on the mover is used for position detection in the X-axis direction and the Y-axis direction. The stator may be joined by adhesion. In this case, the present invention is applied to a joint between a stator and a scale, which are mounted on a mover corresponding to one axis and corresponding to the other axis.

  In this case, the stator and the scale correspond to an example of the first adherend and the second adherend, the joined stator and the scale correspond to an example of the joined body, and the joined body is mounted. The movable element corresponds to an example of a movable body, and the XY stage device corresponds to an example of a driving device.

  In addition to those already described above, the methods according to the above-described embodiments and modifications may be used in appropriate combination. In addition, although not illustrated one by one, the present invention is implemented with various modifications within a range not departing from the spirit and technical idea thereof.

10 Encoder 20 Hub (an example of a rotating body, an example of a second adherend)
23 End surface (an example of the second adhesive surface)
25 groove (example of first groove)
26 groove (example of second groove)
30 discs (example of first adherend)
32 surface (example of first adhesive surface)
41 1st coating layer 42 2nd coating layer SH shaft (an example of a movable body)
SM servo motor

Claims (10)

A disk-shaped disc,
A rotating body having the disk bonded to an end surface;
A first coating layer formed by a first coating agent formed between the disk and the end surface;
An encoder comprising: a second coating layer formed between the disk and the end surface, the second coating layer having a physical property different from that of the first coating agent. The first coating layer and the second coating layer are:
The encoder according to claim 1, wherein any one of the coating layers is formed so as to surround a periphery of the other coating layer. The first coating agent is a first adhesive,
The second coating agent is a sealing agent,
The encoder according to claim 2, wherein the second coating layer formed by the sealant is formed so as to surround the first coating layer formed by the first adhesive. . The sealing agent is
The encoder according to claim 3, wherein the encoder is a second adhesive having different physical properties from the first adhesive. The first adhesive is
It is an adhesive that begins to harden due to external factors,
The second adhesive is
The encoder according to claim 4, wherein the encoder is a two-component mixed adhesive. On the end face,
The encoder according to any one of claims 3 to 5, wherein a first groove is formed at a position between the first coating layer and the second coating layer. On the end face,
The encoder according to any one of claims 3 to 6, wherein a second groove is formed at a position between an outer edge of the end face and the second coating layer. An encoder manufacturing method for manufacturing an encoder in which a disk-shaped disk is bonded to an end face of a rotating body,
A first procedure for applying a first coating agent to the disk or the end surface;
A second procedure for applying a second coating agent having different physical properties from the first coating agent to the disk or the end surface;
And a third procedure for attaching the disk to the end face in a state where the first coating agent and the second coating agent are applied. A driving device for driving a movable body including a joined body in which a first adherend and a second adherend are joined by adhesion in a predetermined motion form including at least one of a rotational motion and a reciprocating motion,
A first coating layer formed of a first coating agent formed between a first adhesive surface of the first adherend and a second adhesive surface of the second adherend;
A drive device comprising: a second coating layer formed between the first adhesive surface and the second adhesive surface, the second coating layer being formed of a second coating agent having different physical properties from the first coating agent. An encoder having a disk-shaped disk as the first adherend and a rotating body as the second adherend; and the joined body in which the disk and the rotating body are bonded together by adhesion. The drive device according to claim 9, wherein the drive device is a servo motor that rotationally moves a shaft that is the movable body.

Images