CN101315288A - Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder - Google Patents
Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder Download PDFInfo
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- CN101315288A CN101315288A CNA2008100399904A CN200810039990A CN101315288A CN 101315288 A CN101315288 A CN 101315288A CN A2008100399904 A CNA2008100399904 A CN A2008100399904A CN 200810039990 A CN200810039990 A CN 200810039990A CN 101315288 A CN101315288 A CN 101315288A
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Abstract
The invention relates to a structure for determining the upper and the lower needle positions of a direct-drive sewing machine by using an optical encoder, and a method thereof. In the structure, a Hall sensor, magnetic steel and an installation part thereof are eliminated. When an inner ring optical grating on an encoder disk passes by a sensor Z, a drive controller starts to count the output of a sensor A and a sensor B; a motor is continuously rotated, when a needle bar reaches the upper needle position, the drive controller stores a digital signal of output pulse of the sensor A and the sensor B; the motor is continuously rotated again, when the needle bar reaches the lower needle position, the drive controller stores a digital signal of output pulse of the sensor A and the sensor B; and the two pulse signals stored by the drive controller are respectively corresponding to angle positions between the upper needle position and the lower needle position, and the inner ring optical grating M. In the invention, parts are eliminated, so that special tools for adjustment are not needed. A hand wheel is just used as a tool to rotate the motor, and after the needle positions are determined, the machine can operate normally even if no hand wheel exists. Furthermore, the optical encoder has higher precision, thereby improving the resolution for adjusting the upper and the lower needle positions.
Description
Technical field
The present invention relates to a kind of structure and method thereof of determining upper and lower needle position of direct drive type flat sewing machine with optical encoder.
Background technology
The control system of have automatic shearing, dial line, front and back reinforcing the direct drive type flat sewing machine of function comprises mode box, driving governor, motor and scrambler etc., driving governor circuit connection mode box, scrambler and motor, scrambler also circuit connects motor, the effect of mode box is to show various parameters and import various instructions by the keyboard on the mode box, driver is controlled rotating speed of motor, position and other sewing functions according to steering order, and preserves various systematic parameters.For aforesaid direct drive type flat sewing machine, need to measure the upper and lower needle position of shank, measure by Hall switch sensor mostly at present, as shown in Figure 1.Two magnet steel 1 and 2 are installed on the handwheel, the axle that handwheel 101 ' and code-disc 102 ' are enclosed within motor upward rotates with motor synchronous, Hall element 1 and 2 and optical sensor A, B, Z is welded on the circuit board that is fixed in back end cover for motor, as shown in Figure 2, optical sensor A, B, Z is integrated in the described optical encoder 103 ', shape becomes the U font, code-disc rotates in the centre, parallel beam is sent by the radiating portion 1031 ' of optical encoder 103 ' one side, the light that utilizes LED 10311 ' to send, after passing lens 10312 ', seeing through code-disc 102 ' again is mapped in the test section 1032 ' of opposite side, detection through photodiode 10321 ', after the comparison of signal processing circuit 10322 ' and amplifying circuit 10323 ', output A, B, the Z position signalling;
The code-disc structure is carved two circle gratings as shown in Figure 3 on the code-disc, the outer ring is closeer, is used on the sewing machine and needs hundreds of approximately, and inner ring only has one, the outer ring amplify launch after as shown in Figure 4.As shown in Figure 1, gear train guarantees the fixed relationship of motor corner and shank position, so the position of the strict corresponding shank of certain some N (as Fig. 1 orbicular spot) on the handwheel.When shank when arrive to go up the pin position be last pin position aligned in position among round dot N and the figure, magnet steel 1 overlaps with Hall element 1, pin digit pulse signal in the output.When shank when to arrive pin position down be following pin position aligned in position among round dot N and the figure, magnet steel 2 overlaps with Hall element 2, exports following pin digit pulse signal.Handwheel whenever turns around, and promptly exports one and goes up pin position signal and a following pin position signal, and this signal is sent into controller and handled, and finishes automatic shearing, dials functions such as line, front and back reinforcing.Upper and lower pin position is constant, but the machine of the cooperating of fixing, the motor of handwheel and motor shaft and gear train, different manufacturers there are differences, so the position of magnet steel on handwheel can't pre-determine.After the machine assembling is finished, just can realize required shank position by regulating the position of magnet steel on the handwheel circumference.There are three shortcomings in this control method, and the one, the essential magnet steel of installing on handwheel, the 2nd, handwheel machine ability operate as normal must be arranged, the 3rd, must use instrument could regulate the position of magnet steel.
Summary of the invention
A kind of structure and method thereof of determining upper and lower needle position of direct drive type flat sewing machine with optical encoder provided by the invention, the Hall element and the magnet steel that use in traditional localization method have been removed, thereby need not specific purpose tool also can regulate, owing to directly utilize code-disc and optical encoder to determine the pin position, so the pin position also can run well even without the handwheel machine after determining.
In order to achieve the above object, the invention provides and a kind ofly determine to comprise the structure of upper and lower needle position of direct drive type flat sewing machine with optical encoder:
Mode box, driving governor, motor and optical encoder; Driving governor circuit connection mode box, optical encoder and motor, optical encoder also circuit connect motor;
The axle that handwheel and code-disc are enclosed within motor upward rotates with motor synchronous;
Carve two circle gratings on the code-disc, the outer ring is closeer, and inner ring only has one;
Optical encoder is welded on the circuit board that is fixed in back end cover for motor, optical sensor A, B, Z are integrated in the described optical encoder, shape becomes the U font, code-disc rotates in the centre, and parallel beam is sent by the radiating portion of optical encoder one side, the light that utilizes light emitting diode to send, after passing lens, see through code-disc again and be mapped in the test section of opposite side, after the comparison of detection, signal processing circuit and the amplifying circuit of process photodiode, output A, B, Z position signalling;
The present invention is based on the basis of said structure, a kind of method of determining upper and lower needle position of direct drive type flat sewing machine with optical encoder is provided, because the physical construction of direct drive sewing machine has guaranteed the movement position between the rotor, shank position, handwheel three of motor and has had strict corresponding relationship, and the original rotor-position that just needs to measure with code-disc and optical encoder motor of control motor, as long as therefore know rotor-position, just can know the shank position, so the present invention directly utilizes code-disc and optical encoder to determine the pin position;
The method includes the steps of:
Step 1, power on, mode box is carried out the parameter setting, and direct drive type flat sewing machine enters the pin position state is set;
Step 2, artificial rotation hand wheel by the handwheel rotary motor rotor, move up and down thereby drive shank;
Step 3, as the inner ring grating M on the code-disc during through sensor Z, sensor Z output Z signal, mode box display reminding signal, and hummer sends sound, driving governor begins the output of sensors A, B is counted;
Step 4, continue set by step the direction rotation hand wheel in 2, drive the motor rotation, arrive when going up the pin position until shank, manually press the supervisory keyboard on the mode box, driving governor is preserved the pulse digital signal of sensors A, B output;
Step 5, continue set by step direction rotation hand wheel in 2 again, drive the motor rotation, arrive pin position down until shank, manually press the supervisory keyboard on the mode box, driving governor is preserved the pulse digital signal of sensors A, B output.
So far, the corresponding respectively upper and lower pin distance of positions of two pulse digital signals that driving governor is preserved is the angle position that M is ordered from the inner ring grating, and then controller has been kept the position of upper and lower needle position.
The present invention compares with classic method, Hall element, magnet steel and installation part thereof have been saved, so need not specific purpose tool regulates, and handwheel has only become the instrument of electric rotating machine, after the pin position is determined, also can run well even without the handwheel machine, and the precision of optical encoder is higher, thereby the resolution that upper and lower needle position is regulated has improved.
Description of drawings
Fig. 1 is the structural representation that direct drive type flat sewing machine application switch type Hall element is measured upper and lower needle position in the background technology;
Fig. 2 is the structural representation of optical encoder in the background technology;
Fig. 3 is the structural scheme of mechanism of code-disc in the background technology;
Fig. 4 is the enlarged diagram of code-disc outer ring grating among Fig. 3;
Fig. 5 be the method for determining upper and lower needle position of direct drive type flat sewing machine with optical encoder provided by the invention based on the hardware configuration synoptic diagram.
Embodiment
Following according to Fig. 5, specify preferred embodiment of the present invention:
As shown in Figure 5, a kind ofly determine to comprise the structure of upper and lower needle position of direct drive type flat sewing machine with optical encoder:
Mode box, driving governor, motor and optical encoder 103; Driving governor circuit connection mode box, optical encoder 103 and motor, optical encoder 103 are gone back circuit and are connected motor;
The axle that handwheel 101 and code-disc 102 are enclosed within motor upward rotates with motor synchronous;
Carve two circle gratings on the code-disc 102, the outer ring is closeer, is used on the sewing machine and needs hundreds of approximately, and inner ring only has one;
As shown in Figure 5, a kind ofly determine the method for upper and lower needle position of direct drive type flat sewing machine to comprise following steps with optical encoder:
Step 1, power on, mode box is carried out the parameter setting, and direct drive type flat sewing machine enters the pin position state is set;
Step 2, manually press the operative orientation rotation hand wheel shown in Fig. 5, rotation drives rotor by handwheel, moves up and down thereby drive shank, and code-disc is made circular motion with motor;
Step 3, as the inner ring grating M on the code-disc during through sensor Z, sensor Z output Z signal, mode box display reminding signal, and hummer sends sound, driving governor begins the output of sensors A, B is counted;
The operative orientation rotation hand wheel shown in Fig. 5 is pressed in step 4, continuation, drives the motor rotation, when the pin position is gone up in shank arrival, manually presses the supervisory keyboard on the mode box, and driving governor is preserved the pulse digital signal that sensors A, B export;
Step 5, continue press the operative orientation rotation hand wheel shown in Fig. 5 again, drive the motor rotation, arrive pin position down until shank, manually press the supervisory keyboard on the mode box, driving governor is with the pulse digital signal preservation of sensors A, B output.
Claims (6)
1. determine to it is characterized in that the structure of upper and lower needle position of direct drive type flat sewing machine with optical encoder for one kind, comprise:
Mode box, driving governor, motor and optical encoder (103); Driving governor circuit connection mode box, optical encoder (103) and motor, optical encoder (103) are gone back circuit and are connected motor;
The axle that handwheel (101) and code-disc (102) are enclosed within motor upward rotates with motor synchronous;
Optical encoder (103) is fixed on the circuit board of back end cover for motor.
2. the structure of determining upper and lower needle position of direct drive type flat sewing machine with optical encoder as claimed in claim 1, it is characterized in that optical sensor A, B, Z are integrated in the described optical encoder (103), shape becomes the U font, one side is a radiating portion, and opposite side is a receiving unit.
3. as claimed in claim 1ly determine to it is characterized in that the structure of upper and lower needle position of direct drive type flat sewing machine that described code-disc (102) is gone up and carved two circle gratings with optical encoder, the outer ring has hundreds of, and inner ring only has one.
4. determine the method for upper and lower needle position of direct drive type flat sewing machine to it is characterized in that directly utilize code-disc and optical encoder to determine the pin position, the method includes the steps of with optical encoder for one kind:
Step 1, power on, mode box is carried out the parameter setting, and direct drive type flat sewing machine enters the pin position state is set;
Step 2, artificial rotation hand wheel by the handwheel rotary motor rotor, move up and down thereby drive shank;
Step 3, when the inner ring grating on the code-disc during through sensor Z, sensor Z output Z signal driving governor begins the output of sensors A, B is counted;
Step 4, continuation rotation hand wheel drive the motor rotation, when the pin position is gone up in shank arrival, manually press the supervisory keyboard on the mode box, and driving governor is preserved the pulse digital signal that sensors A, B export;
Step 5, continue rotation hand wheel again, drive the motor rotation, arrive pin position down until shank, manually press the supervisory keyboard on the mode box, driving governor is preserved the pulse digital signal of sensors A, B output;
So far, the corresponding upper and lower pin distance of positions is from the angle position that inner ring grating M is ordered respectively for two pulse digital signals that driving governor is preserved, and then controller has been kept the position of upper and lower needle position.
5. as claimed in claim 4ly determine to it is characterized in that the method for upper and lower needle position of direct drive type flat sewing machine that in the step 3, when inner ring grating M point during through sensor Z, mode box display reminding signal, and hummer sends sound with optical encoder.
6. as claimed in claim 4ly determine the method for upper and lower needle position of direct drive type flat sewing machine to it is characterized in that the sense of rotation in described step 2, step 4 and the step 5 is consistent with optical encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100399904A CN101315288A (en) | 2008-07-01 | 2008-07-01 | Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100399904A CN101315288A (en) | 2008-07-01 | 2008-07-01 | Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder |
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| CN101315288A true CN101315288A (en) | 2008-12-03 |
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| CNA2008100399904A Pending CN101315288A (en) | 2008-07-01 | 2008-07-01 | Structure and method for confirming upper and lower needle position of direct drive type flat sewing machine by optical encoder |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914841A (en) * | 2010-03-19 | 2010-12-15 | 义乌市华晨机电有限公司 | Needle position detecting mechanism of industrial sewing machine |
| CN102162177A (en) * | 2011-05-10 | 2011-08-24 | 浙江美机缝纫机有限公司 | Bar tacking machine with needle position safety detection sensor, control method and sensing plate thereof |
| CN109881390A (en) * | 2019-03-25 | 2019-06-14 | 浙江众邦机电科技有限公司 | A kind of lenticular lenses, encoder and zero-crossing detecting device and method |
-
2008
- 2008-07-01 CN CNA2008100399904A patent/CN101315288A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101914841A (en) * | 2010-03-19 | 2010-12-15 | 义乌市华晨机电有限公司 | Needle position detecting mechanism of industrial sewing machine |
| CN102162177A (en) * | 2011-05-10 | 2011-08-24 | 浙江美机缝纫机有限公司 | Bar tacking machine with needle position safety detection sensor, control method and sensing plate thereof |
| CN109881390A (en) * | 2019-03-25 | 2019-06-14 | 浙江众邦机电科技有限公司 | A kind of lenticular lenses, encoder and zero-crossing detecting device and method |
| CN109881390B (en) * | 2019-03-25 | 2021-05-14 | 浙江众邦机电科技有限公司 | Grating sheet, encoder, zero point detection device and zero point detection method |
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Open date: 20081203 |