CN110850809B - Machine detection system and detection method - Google Patents
Machine detection system and detection method Download PDFInfo
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- CN110850809B CN110850809B CN201911290919.8A CN201911290919A CN110850809B CN 110850809 B CN110850809 B CN 110850809B CN 201911290919 A CN201911290919 A CN 201911290919A CN 110850809 B CN110850809 B CN 110850809B
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000006073 displacement reaction Methods 0.000 claims abstract description 35
- 238000007689 inspection Methods 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 19
- 230000033001 locomotion Effects 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 238000012937 correction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005856 abnormality Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 241001522296 Erithacus rubecula Species 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/401—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control arrangements for measuring, e.g. calibration and initialisation, measuring workpiece for machining purposes
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- Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Numerical Control (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a machine detection system, which comprises a machine and a second encoder arranged on the machine, wherein the machine at least comprises a controller, a motor, a bed and a first encoder. Wherein the controller is used for setting a detection mode and sending a command to the motor; the motor receives a command transmitted by the controller to drive the bed to move relative to the machine to generate actual displacement; and the first encoder is used for detecting the motor to obtain a motor feedback value of the motor, and the first encoder transmits the motor feedback value to the controller. The second encoder is used for detecting the actual displacement of the bed and transmitting the actual displacement to the controller by the second encoder, wherein the controller compares the command with the feedback value of the motor to obtain the electric control setting, and compares the feedback value of the motor with the actual displacement to obtain the mechanical error.
Description
Technical Field
The present invention relates to the field of machine inspection technology, and more particularly, to a system and a method for inspecting a machine or a year by using an encoder mounted on a machine.
Background
At present, a series of inspection standards are passed before the machine tool is started or periodically inspected, wherein a round-robin test for testing one of mechanical properties can be used to calculate double round errors, roundness and in-round shrinkage caused by a round track generated by two linear axis motions so as to know the accuracy of the movement section of the machine tool. Among them, the round robin test instruments are expensive and have many drawbacks in application such as: when measuring, only a full circle test of one plane can be made, and the rest planes can only execute a partial arc test; the round-trip size can be limited by the unilateral axial travel; the telescopic rods with different sizes are purchased according to the requirements, and the length correction is required to be carried out regularly; or the circular testing instrument and the CNC controller are separate and independent systems, and are required to be connected with a computer.
Another type of tracking tester is a dynamic tracking machine, which is composed of a two-dimensional optical grid and an optical scanning head, and can measure the 2D motion track of any shape at high speed to analyze the motion condition at high resolution. However, the dynamic tracking instrument is not easy to install, but needs to be additionally connected to the signal acquisition box and the computer, has high damage rate, and needs to be removed and reinstalled when measuring different planes.
Therefore, the prior measuring device needs to disassemble the fixture and the processed workpiece on the machine when detecting. Then, a plurality of tests are required to be performed at specific positions to confirm whether interference exists, so that equipment damage is not caused. However, when the machine needs to be adjusted after measurement, all the metal plates and the measuring equipment need to be removed for correction, and the measuring equipment needs to be reinstalled after correction. In addition, the two measuring devices and the controller are respectively independent and separated systems, and no matter the circular testing instrument or the dynamic circular machine instrument can not obtain the controller command and the motor feedback, therefore, the command is assumed to be fixed during each detection, so that analysis is limited, and the problems of electric control or mechanism can not be distinguished.
Disclosure of Invention
In order to solve the above-mentioned problems, an objective of the present invention is to provide a machine inspection system and an inspection method thereof, which uses a controller to set an inspection mode and send a command to a motor, the motor drives a table to move relative to the machine, a first encoder detects the motor to obtain a feedback value of the motor, and transmits the motor feedback value to the controller, a second encoder detects an actual displacement of the table, and transmits the actual displacement to the controller, and uses the controller to compare the command with the motor feedback value to obtain an electrical control setting, and to compare the motor feedback value with the actual displacement of the table to obtain a mechanical error, so as to further perform an electrical control problem inspection and determine whether to perform automatic compensation on the machine.
Still another object of the present invention is to provide a machine inspection method and an inspection system thereof, which utilize the inspection result to compare with the calculated mechanical error when exiting the machine, and if there is an abnormality, the method can be used to check whether there is a difference in the mechanical error, so as to perform automatic compensation processing in the controller.
Still another object of the present invention is to provide a machine inspection system and an inspection method thereof, which uses a controller combined with a cloud to upload inspection data to the cloud for periodic tracking, so as to form a loop in machine health management.
According to the above object, the present invention discloses a machine inspection system, which comprises a machine and a second encoder mounted on the machine, wherein the machine at least comprises a controller, a motor, a bed and a first encoder. Wherein the controller is used for setting a detection mode and sending a command to the motor; the motor receives a command transmitted by the controller to drive the bed to move relative to the machine to generate actual displacement; and the first encoder is used for detecting the motor to obtain a motor feedback value of the motor, and the first encoder transmits the motor feedback value to the controller. The second encoder is used for detecting the actual displacement of the bed and transmitting the actual displacement to the controller by the second encoder, wherein the controller compares the command with the feedback value of the motor to obtain the electric control setting, and compares the feedback value of the motor with the actual displacement to obtain the mechanical error.
According to the machine detection system, the invention also discloses a machine detection method, which comprises the steps of setting a detection mode of a machine and sending out a command; the motor receives a command to drive the bed to move relative to the machine to generate actual displacement; detecting the motor to obtain a motor feedback value of the motor; returning the feedback value of the motor to the controller; detecting actual displacement generated by the movement of the bed relative to the machine; the command and the motor feedback value are compared to obtain an electric control setting, and the motor feedback value and the actual displacement are compared to obtain a mechanical error.
Drawings
FIG. 1 is a block diagram illustrating a tool inspection system according to the disclosed technology.
FIG. 2 is a block diagram illustrating another embodiment of a tool detection system according to the disclosed technology.
FIG. 3 is a flowchart illustrating steps of a method for machine inspection according to the present disclosure.
Symbol description:
1. machine table detection system 10 machine table
102. Controller (CNC controller) 104 motor
106. First encoder 108 bed
20. Second encoder 30 cloud
Step 50-step 62 machine detection step flow
Detailed Description
The following detailed description of specific embodiments of the present invention is provided, but the present invention is not limited to the following embodiments, and the drawings in the present invention are schematic drawings, mainly intended to represent the connection relationship between the modules, and the detailed description of the embodiments is as follows.
Please refer to fig. 1 first. FIG. 1 is a block diagram illustrating a tool inspection system according to the disclosed technology. In fig. 1, the machine inspection system 1 includes a machine 10 and a second encoder 20, wherein the second encoder 20 is mounted on the machine 10. The machine 10 includes a controller 102, a motor 104, a first encoder 106, and a table 108, wherein the controller 102 is configured to set a detection mode of the machine 10 to determine different motion trajectories of the table 108, and send commands to the motor 104. It is noted that, in the embodiment of the present invention, the controller 102 refers to a CNC controller (computer numerical controller), which is simply referred to as the controller 102 in this specification. The motion profile of the table 108 may be elliptical, rectangular or polygonal. The motor 104 receives commands transmitted by the controller 102, and based on the commands, drives the table 108 to move relative to the machine 10 to generate the actual displacement. The first encoder 106 is configured to detect the motor 104 to obtain a motor feedback value of the motor 104, and the first encoder 106 transmits the motor feedback value to the controller 102. In addition, the connection relationship between the first encoder 106 and the motor 104 and the connection manner thereof are all prior art, and are not main features of the present invention, so they are not described in detail. In addition, the detection mode disclosed in the present invention may be a round-robin mode, at least one specific pattern detection mode or a user-defined detection mode.
The second encoder 20 is configured to detect an actual displacement of the bed 108, and to transmit the actual displacement from the second encoder 20 to the controller 102. In an embodiment of the present invention, the second encoder 20 may be an optical ruler, a magnetic ruler, or a magnetic ring. Therefore, according to the above, the controller 102 can obtain the electronic control setting by comparing the command and the feedback value of the motor; meanwhile, the controller 102 also compares the motor feedback value of the motor 104 with the actual displacement of the table 108 to obtain a mechanical error. The controller 102 may compare the obtained electric control setting and mechanical error with the electric control setting and mechanical error calculated by the machine 10 during the initial period of the machine output to check the electric control or mechanical error problem and determine whether to perform the automatic compensation process for the machine 10. Here, the mechanical error includes belt slip, axial assembly error, a sharp corner phenomenon, or screw backlash.
In yet another preferred embodiment of the present invention, as shown in FIG. 2. The machine inspection system 1 further includes a cloud end 30 communicatively connected to the machine 10, specifically, the controller 102 in the machine 10 is communicatively connected to the cloud end 30, so that the controller 102 can upload and store the motion track, the electrical control setting and the mechanical error of the bed 108 in the cloud end 30, or the cloud end 30 can use the motion track, the electrical control setting and the mechanical error of the bed 108 as reference values and download the reference values to the controller 102. In another preferred embodiment, the controller 102 can also store the detection mode, the electrical control setting and the mechanical error in the cloud 30, so that the user can download the parameters from the cloud 30 when the controller 102 needs to use them. In the present invention, the cloud 30 can update and track the above data periodically, so that it is a ring in health management of the machine system.
In view of the foregoing, the present invention also discloses a machine detection method, please refer to fig. 3. FIG. 3 is a flowchart illustrating steps of a method for machine inspection according to the present disclosure. The description will be given below with reference to fig. 1 in conjunction with the description of fig. 3. In fig. 3, the machine detection step includes: step 50: setting a detection mode of the machine and sending out a command. In this step, the user sets the detection mode of the machine 10 to determine different motion trajectories of the table 108, wherein the detection mode may be a circular mode, a specific pattern detection mode or a user-defined detection mode, and the motion trajectories may be elliptical, rectangular or polygonal motion trajectories. The controller 102 issues a command according to a detection mode set by a user at the machine 10. In another preferred embodiment of the present invention, the detection mode is used to detect the electrical control settings and mechanical errors of the machine 10 during the initial stage of the machine 10. The detection modes, the electrical control settings and/or the mechanical errors may be stored in the cloud 30 (as shown in fig. 2), or the data may be downloaded from the cloud 30 as a reference value during the subsequent periodic detection.
Next, step 52: a command is received by the motor. In this step, the motor 104 receives a command issued by the controller 10. Step 54: the bed moves relative to the machine to produce the actual displacement. In this step, after a command is sent by the controller 102 to the motor 104, the motor 104 moves the table 108 relative to the machine 10 to generate an actual displacement according to the command. Next, step 56: the motor is detected to obtain a motor feedback value of the motor. In this step, the motor feedback value is obtained by detecting the motor 104 by the first encoder 106. Step 58: the feedback value of the motor is returned to the controller. In this step, the first encoder 106 returns the motor feedback value to the controller 102. Next, step 60: and detecting the actual displacement generated when the bed moves relative to the machine. In this step, the actual displacement generated when the machine 10 moves is detected by the second encoder 20 attached to the machine 10.
Finally, in step 62: comparing the command with the motor feedback value to obtain an electrical control setting, and comparing the motor feedback value with the actual displacement to obtain a mechanical error. In this step, the controller 102 compares the command and motor feedback values to obtain an electronically controlled setting and compares the motor feedback values with the actual displacement to obtain a mechanical error.
Therefore, the user can compare the electric control setting and the mechanical error calculated by detecting the machine 10 at the initial stage of the machine output with the electric control setting and the mechanical error obtained in the foregoing step 62, and if there is an abnormality, it can check whether the machine is in electric control according to the difference of the electric control setting or whether the automatic compensation process is to be performed on the machine 10 according to the mechanical error.
According to the machine detection system and the machine detection method disclosed by the invention, the problem that in the prior art, the detection instrument is independent of the system of the controller and detects the precision of the machine through actual machining can be solved, but because a control command and the actual displacement of the machine can not be obtained, the existing detection instrument defaults to the same command, and therefore, when the machine 10 has a problem, the electric control problem or the actual mechanical error can not be distinguished. The technical features of the present invention are to compare the command with the motor feedback value to obtain an electric control setting for checking, and compare the motor feedback value with the actual displacement generated when the table 108 moves relative to the machine 10 to obtain a mechanical error, and determine whether to automatically compensate for the controller 102 by using the mechanical error. The technical means of installing the second encoder 20 on the machine 10 can rapidly detect the whole stroke, so as to improve the stability and performance of the product and greatly reduce the difficulty of detecting the machine.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the claims; while the foregoing description is directed to embodiments and methods disclosed herein, other and further embodiments and methods may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. The machine detection system includes:
a machine, comprising:
a controller for setting a detection mode and sending a command to a motor;
the motor receives the command transmitted by the controller to drive a bed to move;
the bed is driven by the motor to generate an actual displacement when moving relative to the machine; and
a first encoder for detecting the motor to obtain a motor feedback value of the motor, and transmitting the motor feedback value to the controller by the first encoder; and
a second encoder installed on the machine for detecting the actual displacement of the bed and transmitting the actual displacement from the second encoder to the controller,
wherein the controller compares the command with the motor feedback value to obtain an electrical control setting, and compares the motor feedback value with the actual displacement to obtain a mechanical error;
the controller performs an automatic compensation procedure on the machine according to the electric control setting and the mechanical error
The controller is connected with a cloud end, and the controller uploads the electric control setting and the mechanical error to the cloud end for storage.
2. The machine inspection system of claim 1, wherein the second encoder is an optical ruler, a magnetic ruler or a magnetic ring.
3. The tool inspection system of claim 1, wherein the controller reads the stored electrical control settings and the mechanical error from the cloud as a reference value.
4. The tool inspection system of claim 1, wherein the inspection mode is a round-robin mode, at least one pattern-specific inspection mode, or a user-defined inspection mode.
5. A machine inspection method applied to the machine inspection system of any one of claims 1 to 4, comprising the steps of:
setting a detection mode of a machine and sending a command;
receiving the command by a motor;
the motor drives a bed to move relative to the machine to generate an actual displacement;
detecting the motor to obtain a motor feedback value of the motor;
returning the feedback value of the motor to the controller;
detecting the actual displacement generated by the movement of the bed relative to the machine; and
comparing the command with the motor feedback value to obtain an electrical control setting and comparing the motor feedback value with the actual displacement to obtain a mechanical error;
determining whether to perform an automatic compensation procedure on the machine according to the electric control setting and the mechanical error;
storing the detection mode, the electrical control setting and/or the mechanical error in a cloud.
6. The method of claim 5, wherein the step of sending the feedback value of the motor back to the controller is performed by a first encoder.
7. The method of claim 5, wherein the step of detecting the actual displacement of the stage relative to the stage is performed by a second encoder.
8. The method of claim 5, wherein the steps of comparing the command with the motor feedback value to obtain an electronically controlled setting and comparing the motor feedback value with the actual displacement to obtain a mechanical error are performed by a controller.
9. The method of claim 5, wherein the detection mode is a round-robin mode, at least one specific pattern detection mode, or a user-defined detection mode.
10. The method of claim 5 further comprising detecting the electrical control setting and the mechanical error during an initial period of the machine.
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| CN201911290919.8A CN110850809B (en) | 2019-12-16 | 2019-12-16 | Machine detection system and detection method |
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| CN201911290919.8A CN110850809B (en) | 2019-12-16 | 2019-12-16 | Machine detection system and detection method |
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| CN110850809B true CN110850809B (en) | 2024-02-09 |
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| CN111708324A (en) * | 2020-06-28 | 2020-09-25 | 新代科技(苏州)有限公司 | Control method for inhibiting reversing lines based on speed feedforward function |
| CN114273981B (en) * | 2022-03-04 | 2022-05-20 | 苏州古田自动化科技有限公司 | Horizontal five-axis numerical control machining center with abnormal component checking function |
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