CN100373765C - Error correcting method and circuit for step motor driving system - Google Patents
Error correcting method and circuit for step motor driving system Download PDFInfo
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- CN100373765C CN100373765C CNB2004100623244A CN200410062324A CN100373765C CN 100373765 C CN100373765 C CN 100373765C CN B2004100623244 A CNB2004100623244 A CN B2004100623244A CN 200410062324 A CN200410062324 A CN 200410062324A CN 100373765 C CN100373765 C CN 100373765C
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- step number
- stepper motor
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Abstract
The present invention relates to an error correcting method and circuit for a step motor driving system, which is used for a step motor. A plurality of groups of inductance coils are arranged in the present invention to control a rotating shaft to rotate to form an accurate driving system. Firstly, a rotation error correction table is created according to error value of each rotation degree of the step motor. When an error correcting circuit receives a digit displacement signal, a rotation step number signal is generated according to counted required rotation step number of the step motor, and the rotation step number signal and the error value of the rotated degree in the rotation error correction table are contrasted to output accurate compensating correction current to drive the inductance coil in the step motor to accurately rotate the inside rotating shaft, and therefore, the common step motor can be utilized to reach the goal of the precision of a high order step motor.
Description
Technical field
The present invention is a kind of error calibration method and circuit of step motor driving system, particularly about the error calibration method and the correcting circuit of the accurate control step motor of a kind of energy transmission displacement.
Background technology
Along with the arriving of digital Age, add the flourish of relevant software and hardware technology, make various digital devices begin to obtain people's approval, and just be used for widely among the daily life.At products such as many high-order digital cameras or high-order scanners.All used stepper motor that more high-quality image capture is provided.Therefore, under the so strong market demand, manufacturer racks one's brains invariably and researches and develops the drive system of hanging down into pinpoint accuracy, for the use of high-order digit device.
Well-known, stepper motor is to control inner rotating shaft by the inductance coil of a plurality of precisions critically to rotate, to form the drive system displacement, with the high-order scanner, the quality of its scanning quality except with image pick interest get device (CMOS SENER) relevant, the drive system that stepper motor constituted is also quite important, because accurate shift length just can make the correct and high-quality image of video capture device acquisition.
As shown in Figure 1, be the drive circuit figure of existing two-phase stepper motor.In this stepper motor 10, comprise two groups of inductance coils 11, be electrically connected two groups of drive circuits 12 respectively, be electrically connected a digital analog converter 13 again, and the processor 14 that connects an outside constitutes, when this processor 14 is exported a digital displacement signal to this digital analog converter 13, through two groups of Control current of these digital analog converter 13 conversions, export this two groups of drive circuits 12 respectively to, make these two groups of inductance coils 11 excitatory, and make stepper motor 10 inner rotating shafts rotate suitable step number according to the variation of Control current.
Yet if will use the stepper motor 10 of high-order, except the suitable height of cost, the drive system of putting of building still has a little error range, this is because the error that inductance coil 11 is caused, therefore need the trimming process work of back system, do critically to proofread and correct at its error range so still need spend more human cost, quite trouble.
This case inventor is and solves above-mentioned existing utilize inconvenience that step motor driving system has and shortcoming, a kind of design of Transmission System of utilizing general stepper motor can reach precision is proposed, the error correction of stepper motor built place drive circuit, directly improve the precision of stepper motor, and do not need the correction work behind work, made, can reduce the cost of stepper motor again.
Summary of the invention
The object of the present invention is to provide a kind of error calibration method and circuit of whole step motor driving system, general stepper motor built put its error correction table, and utilize error correction circuit, export a compensation correction electric current to the drive circuit of this stepper motor according to the error correction table, the precision of stepper motor can be directly improved, the cost of stepper motor can be reduced again.
For reaching above-mentioned purpose, the present invention mainly provides a kind of error calibration method of step motor driving system, be used on the stepper motor, be provided with many group inductance coils in it and control its inner rotating shaft rotation, form an accurate drive system, this method is at first complied with the error amount of each rotation step number of this stepper motor, build and put a rotation error checking list, when receiving the digital displacement signal of an outside, step number according to this numeral shifting signal counting stepper motor rotation, produce one and rotate the step number signal, and contrast the error amount of the step number of rotating in this rotation step number signal and this rotation error checking list, export an accurate compensation correction electric current, drive the inductance coil of this stepper motor inside, accurately rotate inner rotating shaft.
Especially, the present invention more provides a kind of error correction circuit of step motor driving system, be used on the stepper motor, be provided with many group inductance coils in it and control its inner rotating shaft rotation, form an accurate drive system, this correcting circuit comprises individual at least one those group inductance coils that the merit amplifier is electrically connected on this stepper motor that drive, and rotates in order to drive this rotating shaft; At least one digital displacement signal that turns to the step number controller to receive an outside converts the rotation step number signal of a stepper motor to; And one error corrector be electrically connected on this drive circuit and this turns between the step number controller, after The built-in is put a rotation error checking list (GAMMA Table) and is received this rotation step number signal, after the correction according to this rotation error checking list, export this drive circuit again to, drive the drive system precise displacement of this stepper motor.
Description of drawings
Fig. 1 is the drive circuit figure of existing phase stepper motor;
Fig. 2 is the circuit diagram of stepper motor correcting circuit of the present invention;
Fig. 3 is the circuit diagram of this error corrector and this driving amplifier; And Fig. 4 is an error correction schematic flow sheet of the present invention.
The figure number explanation
10 stepper motors, 11 inductance coils
12 drive circuits, 13 digital analog converters
14 processors, 20 error correction circuits
21 driving amplifiers, 22 error correctors
221 digital analog converters, 222 rotation error checking lists
23 turn to step number controller 231 to rotate the step number signal
24 step number counters, 25 processors
251 digital displacement signals
Embodiment
As shown in Figure 2, be the circuit diagram of stepper motor correcting circuit of the present invention.The present invention is that example is illustrated with two-phase stepper motor 10 still, rotate the transmission displacement that can produce at least eight steps a week, yet employed stepper motor on the high-order drive system rotate the transmission displacement more than can going on foot up to 200 in a week, but principle is all identical.
And the error correction circuit 20 of step motor driving system of the present invention, promptly be to be installed on this stepper motor 10, and in the present embodiment, this stepper motor 10 is provided with two groups of inductance coils 11, the rotation step number of the inner rotating shaft of may command, this error correction circuit 20 then includes two groups of driving amplifiers 21, two grouping error adjusters 22, one group and turns to a step number controller 23 and a step number counter 24 to constitute, and can receive the digital displacement signal 251 that the processor 25 of an outside is sent.
Wherein this driving amplifier 21 is electrically connected on two groups of inductance coils 11 of this stepper motor 10, in order to the inductance coil 11 that drives this stepper motor 10, in order to rotate inner rotating shaft, forms this drive system.And this turns to step number controller 23 to be electrically connected on this step number counter 24, this step number counter 24 then receives this digital displacement signal 251 that this ppu 25 is transmitted, count value according to these digital displacement signal 251 these stepper motor 10 required rotation step numbers of counting, export this to and turn to step number controller 23, rotate step number signal 231 so that convert thereof into one of these stepper motor 10 rotations.
Wherein this error corrector 22 is organized saltyly by a plurality of digital analog converter 221, and is electrically connected on this driving amplifier 21 and this turns between the step number controller 23, as shown in Figure 3, is the circuit diagram of this error corrector and this driving amplifier.Be equipped with a rotation error checking list (Gamma Table) 222 in that this error corrector 22 is built-in, and this rotation error checking list 222 be according to this stepper motor 10 of each batch when dispatching from the factory, build to put through the error amount that accurately measures its each step number and form.
Usually this stepper motor 10 is in a collection of manufacture process, it is identical with the error amount of criticizing that stepper motor produced, as long as therefore will get the accurate measurement that one of them makes error amount with a collection of stepper motor that dispatches from the factory, again according to error amount that each step number produced, add and subtract a compensation correction electric current, make its each step all can accurately rotate errorless.
Therefore, when build put finish this rotation error checking list after, be stored in this error corrector 22, and behind this rotation step number signal 231 of these error corrector 22 receptions, rotate step number signal 231 these rotation error checking lists 222 of contrast according to this again, do the correction of error amount after, be converted to the compensation correction electric current that each rotates step number through this digital analog converter 221, export this driving amplifier 21 again to, accurately rotate to drive this stepper motor 10.
See also shown in Figure 4ly, be error correction schematic flow sheet of the present invention.The error calibration method of step motor driving system of the present invention, the error amount that at first need comply with each rotation step number of this stepper motor 10 is built and is put rotation error checking list 222, and is stored in this error corrector 22 (S100).The digital displacement signal 251 that transmits an outside when outside this processor 25 is during to this error correction circuit 20 of the present invention, and this step number counter 24 promptly receives this digital displacement signal 251 (S102).
This is the step number of motor 10 required rotations into to this step number counter 24 according to these digital displacement signal 251 countings, exports this to and turns to step number controller 23, makes this turn to step number controller 23 to produce one and rotates step number signal 231 and export this error corrector 22 (S104) to.
Then this error corrector 22 contrasts the error amount that this rotates the step number of rotating in step number signal 23 1 and this rotation error checking list 222, output one accurate compensation correction electric current (S106), the internal inductance coil 11 that drives this stepper motor 10 accurately rotates inner rotating shaft, forms accurate transmission.
Claims (12)
1. the error calibration method of a step motor driving system is characterized in that, is used on the stepper motor, is provided with many group inductance coils in it and controls its inner rotating shaft rotation, forms an accurate drive system, and this method comprises:
Comply with the error amount of each rotation step number of this stepper motor, build and put a rotation error checking list;
Receive the digital displacement signal of an outside;
According to the step number of the required rotation of this this stepper motor of digital displacement signal-count, produce one and rotate the step number signal;
Contrast the error amount of the step number of rotating in this rotation step number signal and this rotation error checking list, export an accurate compensation correction electric current, drive the inductance coil of this stepper motor inside, accurately rotate inner rotating shaft.
2. the error calibration method of step motor driving system as claimed in claim 1 is characterized in that, builds in the step of putting this rotation error checking list, and this rotation error checking list is built and placed an error corrector.
3. the error calibration method of step motor driving system as claimed in claim 1 is characterized in that, receives in the step of this outside digital displacement signal, turns to the step number controller to receive this digital displacement signal by one.
4. the error calibration method of step motor driving system as claimed in claim 1 is characterized in that, receives in the step of this outside digital displacement signal, and this outside digital displacement signal is sent by the processor of an outside.
5. the error calibration method of step motor driving system as claimed in claim 1 is characterized in that, complies with the step of the step number of the required rotation of this this stepper motor of digital displacement signal-count, is counted by a step number counter.
6. the error calibration method of step motor driving system as claimed in claim 1 is characterized in that, contrasts in the step of this rotation error checking list, is proofreaied and correct by an error corrector.
7. the error calibration method of step motor driving system as claimed in claim 1 is characterized in that, drives in the step of this stepper motor, is electrically connected the inductance coil of this stepper motor inside by a plurality of driving amplifiers, accurately rotates to drive this inside rotating shaft.
8. the error correction circuit of a step motor driving system is characterized in that, is applied on the stepper motor, is provided with many group inductance coils in it and controls its inner rotating shaft rotation, forms accurate drive system, and this correcting circuit comprises:
At least one driving amplifier is electrically connected on these group inductance coils of this stepper motor, rotates in order to drive this rotating shaft;
At least one step number controller that turns to receives the digital displacement signal of an outside, converts the rotation step number signal of a stepper motor to; And
One error corrector, be electrically connected on this driving amplifier and this turns between the step number controller, The built-in is put a rotation error checking list, after receiving this rotation step number signal, after the correction according to this rotation error checking list, export this driving amplifier again to, drive the drive system precise displacement of this stepper motor.
9. the error correction circuit of step motor driving system as claimed in claim 8 is characterized in that, the external digital displacement signal that this turns to the step number controller to be received is sent out by the processor of an outside.
10. the error correction circuit of step motor driving system as claimed in claim 9, it is characterized in that, this turns to the step number controller to be electrically connected a step number counter, produces the count value of the required rotation of this stepper motor according to this digital displacement signal, exports this to and turns to the step number controller.
11. the error correction circuit of step motor driving system as claimed in claim 8 is characterized in that, built-in this rotation error checking list put of this error corrector is built to put according to the Accuracy Error value of each step number of this stepper motor and is formed.
12. the error correction circuit of step motor driving system as claimed in claim 8, it is characterized in that, this error corrector is made up of a plurality of analog-digital converter, after contrasting error amount in this rotation error checking list according to this rotation step number signal, be converted to the compensation correction current signal that each rotates step number, export this driving amplifier to, accurately rotate this drive system to drive this stepper motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100623244A CN100373765C (en) | 2004-07-01 | 2004-07-01 | Error correcting method and circuit for step motor driving system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100623244A CN100373765C (en) | 2004-07-01 | 2004-07-01 | Error correcting method and circuit for step motor driving system |
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| Publication Number | Publication Date |
|---|---|
| CN1716757A CN1716757A (en) | 2006-01-04 |
| CN100373765C true CN100373765C (en) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100623244A Expired - Fee Related CN100373765C (en) | 2004-07-01 | 2004-07-01 | Error correcting method and circuit for step motor driving system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE112011103358T5 (en) * | 2010-10-05 | 2013-07-04 | Mitsubishi Electric Corporation | Microstep drive control device for a stepping motor |
| CN102545750B (en) * | 2010-12-13 | 2014-09-24 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Control method and control device of stepping motor, matcher and plasma processing device |
| CN103698617A (en) * | 2014-01-06 | 2014-04-02 | 南京顺仕祥电子有限公司 | Antenna measuring space scanning plane error compensation method |
| TWI735337B (en) * | 2020-09-11 | 2021-08-01 | 由田新技股份有限公司 | Linear displacement calibration method and inspection apparatus using the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118194A (en) * | 1993-02-25 | 1996-03-06 | 俄亥俄电子刻板公司 | Apparatus and method for driving a leadscrew |
| US5770937A (en) * | 1996-08-21 | 1998-06-23 | Nikon Corporation | Stepping motor driving device |
-
2004
- 2004-07-01 CN CNB2004100623244A patent/CN100373765C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118194A (en) * | 1993-02-25 | 1996-03-06 | 俄亥俄电子刻板公司 | Apparatus and method for driving a leadscrew |
| US5770937A (en) * | 1996-08-21 | 1998-06-23 | Nikon Corporation | Stepping motor driving device |
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| Publication number | Publication date |
|---|---|
| CN1716757A (en) | 2006-01-04 |
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