CN108983701A - Synchronous drive device and driving method - Google Patents

Abstract

The embodiment of the present invention provides a kind of synchronous drive device and driving method, wherein the device includes: pedestal, load, two structures are identical, and driving assembly disposed in parallel, controller and the identical Grating examinations device of two structures, wherein, driving assembly includes the ball-screw being arranged on the base and the motor connecting with ball-screw, it loads affixed with the ball-screw of two driving assemblies, two Grating examinations devices are arranged in parallel with one in two driving assemblies respectively, for detecting the displacement at load both ends, controller is electrically connected with the motor in two Grating examinations devices and two driving assemblies respectively, the both ends synchronizing moving loaded for the testing result driving according to two Grating examinations devices.Synchronous drive device and driving method provided in an embodiment of the present invention, synchronization accuracy are higher.

Description

Synchronous driving device and driving method

technical field

The embodiments of the present invention relate to the technical field of automation control, in particular to a synchronous drive device and a drive method.

Background technique

In various industrial automation equipment such as CNC machine tools, inkjet printers, and digital printing equipment, as the size of the processed workpiece increases or the size of the printed product increases, the demand for synchronous drive control of wide-width and large-span loads is becoming more and more extensive. However, during the linear movement of the wide-width and large-span load, due to the frictional resistance of the transmission mechanism and the deformation of the mechanical structure, the synchronization of the movement of both ends of the wide-width and large-span load will be affected.

The existing method to solve this problem is mainly to decompose the main drive of the motor through the mechanical transmission structure, so as to achieve the purpose of simultaneously driving both ends of the wide and large span load, and realize the synchronous linear movement of the wide and large span load.

However, the mechanical transmission structure in the above-mentioned prior art is relatively complex, requires high assembly and processing technology of the mechanical structure, is easily affected by accumulated errors in the transmission process, and has low synchronization accuracy.

Contents of the invention

Embodiments of the present invention provide a synchronous driving device and a driving method for improving the precision of synchronous driving.

The first aspect of the embodiment of the present invention provides a synchronous driving device, which includes:

The base, the load, and two drive assemblies with the same structure and arranged in parallel, wherein, the drive assembly includes a ball screw arranged on the base and a motor connected to the ball screw, and the load It is fixedly connected with the ball screw of the two driving assemblies, especially, the device also includes:

A controller and two grating detection devices with the same structure, the two grating detection devices are respectively arranged in parallel with one of the two driving assemblies, and are used to detect the displacement at both ends of the load, and the controller is respectively connected with The two grating detection devices and the motors in the two driving components are electrically connected, and are used to drive the two ends of the load to move synchronously according to the detection results of the two grating detection devices.

The second aspect of the embodiment of the present invention provides a driving method for a synchronous driving device, the method is applicable to a synchronous driving device, the device includes a base, a load, and two driving assemblies with the same structure and arranged in parallel, wherein the The drive assembly includes a ball screw arranged on the base and a motor connected to the ball screw, and the load is fixedly connected to the ball screws of the two drive assemblies. In particular, the device Also includes:

A controller and two grating detection devices with the same structure, the two grating detection devices are respectively arranged in parallel with one of the two driving assemblies, and are used to detect the displacement at both ends of the load, and the controller is respectively connected with The two grating detection devices and the motors in the two driving assemblies are electrically connected;

The methods include:

The controller receives the detection information sent by the two grating detection devices at the same time, and the detection information includes the displacement of both ends of the load at the time;

The controller determines the driving amount of the motors in the two drive components according to the displacement of the two ends of the load, so that the two ends of the load move synchronously.

In the embodiment of the present invention, by using two grating detection devices to detect the displacement at both ends of the load, the controller can monitor the displacement at both ends of the load in real time according to the detection information of the two grating detection devices, and the displacement at both ends of the load When the quantity is inconsistent, the driving quantity of the motor is changed in time, so that both ends of the load can move synchronously, which overcomes the problems of complex mechanical structure, high requirements for assembly and processing technology and accumulation of structural errors in the prior art, and has high synchronization accuracy.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a synchronous driving device provided by an embodiment of the present invention;

FIG. 2 is a flowchart of a driving method provided by an embodiment of the present invention.

Reference signs:

101-base 102-load

1031-Ball screw 1032-Motor

1051-Rail 1052-Raster Reader

1053- grating ruler

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The terms "comprising" and "having" and any variations thereof in the description and claims of the present invention are intended to cover a non-exclusive inclusion, for example, a process comprising a series of steps or a device of structure need not be limited to the expressly listed Instead, those structures or steps may include other steps or structures not expressly listed or inherent to the process or device.

Fig. 1 is a schematic structural diagram of a synchronous driving device provided by an embodiment of the present invention. As shown in Figure 1, the device includes:

The base 101 , the load 102 , the first driving assembly and the second driving assembly, wherein the first driving assembly and the second driving assembly have the same structure, and they are arranged on the base 101 parallel to each other. Wherein, the first driving assembly includes a ball screw 1031 arranged on the base 101 and a motor 1032 connected with the ball screw 1031 . The structure of the second driving assembly is the same as that of the first driving assembly, and will not be repeated here.

Both ends of the load 102 are respectively fixedly connected with the ball screws of the first drive assembly and the second drive assembly. Both ends of the load 102 move linearly together with the ball screws of the first drive assembly and the second drive assembly driven by the motors of the first drive assembly and the second drive assembly.

In particular, in this embodiment, the device may further include a first grating detection device, a second grating detection device, and a controller (not shown in FIG. 1 ). Wherein, the first grating detection device is arranged parallel to the first drive assembly on the base 101 near the first drive assembly, and the second grating detection device is parallel to the second drive assembly on the base 101 near the second drive assembly. The components are arranged in parallel. That is to say, in this embodiment, the first grating detection device and the second grating detection device can be described as being respectively arranged in parallel with one of the two driving assemblies. Wherein, the first grating detection device and the second grating detection device are used to detect the displacement at both ends of the load. The controller is electrically connected with the first grating detection device, the second grating detection device, and the motors in the first drive assembly and the second drive assembly respectively.

In practical applications, the first grating detection device and the second grating detection device send respective detection information to the controller, and the controller obtains the displacement of each of the two ends of the load 102 from the detection information. Then determine the driving amount of the motors in the first drive assembly and the second drive assembly according to the difference between the displacements of the two ends, so as to ensure that the two ends of the load move synchronously. For example, if the first grating detection device detects that the displacement of one end of the load 102 is 5 cm, and the second grating detection device detects that the displacement of the other end of the load 102 is 6 cm, then the controller controls the output control signal so that the second drive The driving amount of the motor in the assembly increases, and the driving amount of the motor in the first driving assembly decreases or remains the same, so as to make up for the displacement difference between the two ends of the load, thereby enabling synchronous movement.

In particular, in this embodiment, the first driving assembly further includes a guide rail 1051 , and the first grating detection device and the second grating detection device have the same structure, wherein the first grating detection device includes a grating reader 1052 and a grating ruler 1053 . Wherein the guide rail 1051 is arranged on the base 101 parallel to the first ball screw 1031 . One end of the grating reader 1052 is slidably disposed on the guide rail 1051 , and the other end is fixedly connected to one end of the load 102 . The grating ruler 1053 is arranged on the base 101 parallel to the guide rail 1051 . When the load 102 moves, the grating reader 1052 slides along the guide rail 1051 driven by the load, and sends the readings read from the grating ruler to the controller. What needs to be explained here is that there are grating lines on the grating ruler, and each grating line represents a different displacement. When the grating reader 1052 moves to different positions, the detected grating lines are different. Therefore, through the cooperation between the grating ruler 1053 and the grating reader 1052, the displacement of the load can be acquired in real time. In particular, there is also a standard position on the grating ruler 1053, which represents the key position of the load movement, that is, when the load moves to the standard position, the controller will adjust the assignment of the shift register of the motor to zero, so that the load stop moving. The structure of the second grating detection device is the same as that of the first grating detection device, and will not be repeated here.

In this embodiment, by using two grating detection devices to detect the displacement at both ends of the load, the controller can monitor the displacement at both ends of the load in real time according to the detection information of the two grating detection devices, and the displacement at both ends of the load When there is inconsistency, the driving amount of the motor is changed in time, so that both ends of the load can move synchronously, which overcomes the problems of complex mechanical structure, high requirements for assembly and processing technology and accumulation of structural errors in the prior art, and has high synchronization accuracy.

Fig. 2 is a flowchart of a driving method provided by an embodiment of the present invention, the method is applicable to the driving device shown in Fig. 1, and as shown in Fig. 2, the method includes:

S11. The controller receives the detection information sent by the two grating detection devices at the same time, and the detection information includes the displacement of both ends of the load at the time.

Wherein, the two grating detection devices described in this embodiment may be specifically referred to as the first grating detection device and the second detection device in the embodiment shown in FIG. 1 .

In practical applications, the grating reader moves along the guide rail driven by the load, and at the same time, the grating reader reads from the grating ruler and sends the read reading to the controller, so that the controller can perform real-time control based on the reading .

S12. The controller determines the driving amounts of the motors in the two drive assemblies according to the displacements at both ends of the load, so that the two ends of the load move synchronously.

Wherein, the two drive assemblies described in this embodiment may be specifically referred to as the first drive assembly and the second drive assembly in FIG. 1 above.

The method provided in this embodiment is applicable to the synchronous driving device shown in FIG. 1 , and its execution process and beneficial effects are similar to those of the embodiment in FIG. 1 , and will not be repeated here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (8)

1. A synchronous driving device, comprising a base, a load and two drive assemblies with the same structure and arranged in parallel, wherein the drive assembly includes a ball screw arranged on the base and a ball screw connected to the ball A motor connected by a lead screw, the load is fixedly connected to the ball screws of the two drive assemblies, and it is characterized in that the device also includes: A controller and two grating detection devices with the same structure, the two grating detection devices are respectively arranged in parallel with one of the two driving assemblies, and are used to detect the displacement at both ends of the load, and the controller is respectively connected with The two grating detection devices and the motors in the two driving components are electrically connected, and are used to drive the two ends of the load to move synchronously according to the detection results of the two grating detection devices. 2. The device according to claim 1, wherein the drive assembly further comprises a guide rail, and the grating detection device comprises: a grating reader and a grating ruler; Wherein, the grating reader is connected to the controller; The guide rail is arranged on the base parallel to the ball screw, one end of the grating reader is slidably arranged on the guide rail, and the other end is fixedly connected to one end of the load; The grating ruler is arranged on the base parallel to the guide rail, and the grating reader reads from the grating ruler. 3 . The device according to claim 2 , wherein a standard position is set on the grating ruler, and the standard position is an end position of the load movement. 4 . 4. The apparatus according to claim 3, wherein the controller comprises a shift register, and when the raster reader detects the standard position, the shift register is assigned a value of zero. 5. A driving method, the method is applicable to a synchronous driving device, the device includes a base, a load and two driving assemblies with the same structure and arranged in parallel, wherein the driving assembly includes a The ball screw on the seat and the motor connected with the ball screw, the load is fixedly connected with the ball screw of the two drive assemblies, it is characterized in that the device also includes: A controller and two grating detection devices with the same structure, the two grating detection devices are respectively arranged in parallel with one of the two driving assemblies, and are used to detect the displacement at both ends of the load, and the controller is respectively connected with The two grating detection devices and the motors in the two driving assemblies are electrically connected; The methods include: The controller receives the detection information sent by the two grating detection devices at the same time, and the detection information includes the displacement of both ends of the load at the time; The controller determines the driving amount of the motors in the two drive components according to the displacement of the two ends of the load, so that the two ends of the load move synchronously. 6. The method according to claim 5, wherein the drive assembly further comprises a guide rail, and the grating detection device comprises: a grating reader and a grating ruler; in, The grating ruler and guide rail are arranged on the base parallel to the ball screw, one end of the grating reader is slidably arranged on the guide rail, and the other end is fixedly connected to one end of the load; The method also includes: When the grating reader slides synchronously with one end of the load on the guide rail, the controller receives the detection information of the grating reader, the detection information includes the load and the grating reader The amount of displacement at one end of the connection. 7. The method according to claim 6, wherein a standard position is set on the grating ruler, and the standard position is an end position of the load movement. 8. The method according to claim 7, wherein the controller comprises a shift register, and when the grating reader detects the standard position, the controller sets the assignment of the shift register to zero.