CN101004602A - Method for raising precision of closed loop control system of digital control machine tool - Google Patents
Method for raising precision of closed loop control system of digital control machine tool Download PDFInfo
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- CN101004602A CN101004602A CN 200710066770 CN200710066770A CN101004602A CN 101004602 A CN101004602 A CN 101004602A CN 200710066770 CN200710066770 CN 200710066770 CN 200710066770 A CN200710066770 A CN 200710066770A CN 101004602 A CN101004602 A CN 101004602A
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Abstract
A method for raising accuracy of closed loop control system on digital-controlled machine includes inputting position and speed command by command setting unit, comparing input signal with feedback signal by comparator, driving servo-driving unit after regulation and amplification, setting position detection unit on operation position of machine and entering detection signal into comparator.
Description
Technical field
The invention belongs to machining methods, specifically is a kind of method that improves precision of closed loop control system of digital control machine tool.
Background technology
At present, Closed loop Control is widely used in the control of high-precision numerical control machine, because the part driving errors such as screw mandrel on the closed-loop control lathe have been corrected, so the bearing accuracy of machine tool guideway motion depends on the accuracy of detection of pick-up unit fully, but use very costliness of high Precision Detection installation cost.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of method that improves precision of closed loop control system of digital control machine tool is disclosed, put the conversion of data by two groups of detecting element institute locations, reach final employing conventional detection elements and detect and to obtain the high Precision Detection data, thereby reduce cost.
The method of numerical control machine closed loop control system, generally be in digital control system, by the instruction setter Position And Velocity instruction is imported, by comparer input signal and feedback signal are compared, from the position error signal of comparer output, after regulating amplification, drive servo drive, behind the voltage signal of the adjusted device of servo drive, the movement velocity that output power is enough, the motion of controlling object; Working position at lathe is equipped with position detecting device, measure the actual displacement of execution unit, convert it to electric signal and feed back to output terminal, in comparer, compare with input instruction signal, making system towards the direction operation that reduces deviation, is zero until deviation signal.
Because the high Precision Detection element costs an arm and a leg, the present invention takes following technical proposal:
A kind of numerically-controlled machine improves the method for closed-loop control system precision, by the instruction setter Position And Velocity instruction is imported, by comparer input signal and feedback signal are compared, after regulating amplification, drive servo drive, working position at lathe is provided with position detecting device, detection signal enters comparer, it is characterized in that: position detecting device is installed earlier two groups of detecting elements simultaneously, one group is the high Precision Detection element, another group is conventional detection elements, two groups of detecting elements have a common data initial point, guide rail movement is through each some during position, all will detect separately position data simultaneously by two groups of detecting elements, and respectively by the Survey Software record, what wherein the high Precision Detection element testing went out is the high precision position data, conventional detection elements is detected to be the general position data, and the high precision position data on each point are corresponding one by one with the general position data, detects data with two groups and imports a converter; Remove the high Precision Detection element, measure the each point position data by conventional detection elements, and with institute's survey each point general position data input converter, and converter will be stored in wherein with the corresponding high precision position data of these general position data input comparator, in comparer, compare with input instruction signal, from the position error signal of comparer output, after regulating amplification, drive servo drive.
Position detecting device of the present invention is because earlier with conventional detection elements and the corresponding one by one input converter of the detection data of high Precision Detection element, remove the high Precision Detection element again, directly measure with conventional detection elements, and with institute's survey each point general position data input converter, and converter will be stored in wherein with the corresponding high precision position data of these general position data input comparator, thereby the final use conventional detection elements detection position data that only need can obtain the high precision position data, improve accuracy of detection, and reduce cost.
Embodiment
A kind of numerically-controlled machine improves the method for closed-loop control system precision, by the instruction setter Position And Velocity instruction is imported, by comparer input signal and feedback signal are compared, after regulating amplification, drive servo drive, working position at lathe is provided with position detecting device, detection signal enters comparer, it is characterized in that: position detecting device is installed earlier two groups of detecting elements simultaneously, one group is the high Precision Detection element, another group is conventional detection elements, two groups of detecting elements have a common data initial point, guide rail movement is through each some during position, all will detect separately position data simultaneously by two groups of detecting elements, and respectively by the Survey Software record, what wherein the high Precision Detection element testing went out is the high precision position data, conventional detection elements is detected to be the general position data, and the high precision position data on each point are corresponding one by one with the general position data, detects data with two groups and imports a converter; Remove the high Precision Detection element, measure the each point position data by conventional detection elements, and with institute's survey each point general position data input converter, and converter will be stored in wherein with the corresponding high precision position data of these general position data input comparator, in comparer, compare with input instruction signal, from the position error signal of comparer output, after regulating amplification, drive servo drive.
Claims (1)
1, a kind of numerically-controlled machine improves the method for closed-loop control system precision, by the instruction setter Position And Velocity instruction is imported, by comparer input signal and feedback signal are compared, after regulating amplification, drive servo drive, working position at lathe is provided with position detecting device, detection signal enters comparer, it is characterized in that: position detecting device is installed earlier two groups of detecting elements simultaneously, one group is the high Precision Detection element, another group is conventional detection elements, two groups of detecting elements have a common data initial point, guide rail movement is through each some during position, all will detect separately position data simultaneously by two groups of detecting elements, and respectively by the Survey Software record, what wherein the high Precision Detection element testing went out is the high precision position data, conventional detection elements is detected to be the general position data, and the high precision position data on each point are corresponding one by one with the general position data, detects data with two groups and imports a converter; Remove the high Precision Detection element, measure the each point position data by conventional detection elements, and with institute's survey each point general position data input converter, and converter will be stored in wherein with the corresponding high precision position data of these general position data input comparator, in comparer, compare with input instruction signal, from the position error signal of comparer output, after regulating amplification, drive servo drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710066770 CN101004602A (en) | 2007-01-17 | 2007-01-17 | Method for raising precision of closed loop control system of digital control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710066770 CN101004602A (en) | 2007-01-17 | 2007-01-17 | Method for raising precision of closed loop control system of digital control machine tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101004602A true CN101004602A (en) | 2007-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 200710066770 Pending CN101004602A (en) | 2007-01-17 | 2007-01-17 | Method for raising precision of closed loop control system of digital control machine tool |
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| CN (1) | CN101004602A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944995A (en) * | 2012-07-20 | 2013-02-27 | 长春理工大学 | Servo system controller and control method |
| CN105252874A (en) * | 2015-10-27 | 2016-01-20 | 盐城旭华机械有限公司 | Servo control based multilayer flame laminating mechanism |
-
2007
- 2007-01-17 CN CN 200710066770 patent/CN101004602A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102944995A (en) * | 2012-07-20 | 2013-02-27 | 长春理工大学 | Servo system controller and control method |
| CN102944995B (en) * | 2012-07-20 | 2015-06-24 | 长春理工大学 | Servo system controller and control method |
| CN105252874A (en) * | 2015-10-27 | 2016-01-20 | 盐城旭华机械有限公司 | Servo control based multilayer flame laminating mechanism |
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