CN101016672A - Control device of motor for driving triangular frame of flat knitting machine - Google Patents
Control device of motor for driving triangular frame of flat knitting machine Download PDFInfo
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- CN101016672A CN101016672A CN 200710003955 CN200710003955A CN101016672A CN 101016672 A CN101016672 A CN 101016672A CN 200710003955 CN200710003955 CN 200710003955 CN 200710003955 A CN200710003955 A CN 200710003955A CN 101016672 A CN101016672 A CN 101016672A
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Abstract
A control device for driving motor of trigon sliding framework of flat knitting machine moving along instrument bed, comprises: output circuit which supplies output voltage to the driving motor of trigon sliding framework, monitoring circuit which monitors the charge of the driving motor of trigon sliding framework, and protection circuit. The protection circuit controls the output circuit and and protects the driving motor of trigon sliding framework, to reduce the output voltage when the charge of the driving motor is over the fiducial value. In the reducing process, the output voltage is returned if the charge is normal. The control device for driving motor of trigon sliding framework of flat knitting machine avoids heat when braids in maximum charge.
Description
Technical field
The present invention relates to be used to drive an edge needle-bar walking makes knitting needle carry out the control device of motor for driving triangular frame of straight-bar machines of the cam carrier of braid movement on one side.
Background technology
In the past, straight-bar machines as the conventional art hurdle of opening flat 6-280141 communique (Japan's patent disclosure communique is put down into 6 years No. 280141) the spy is introduced, the cam carrier of the braiding cam that possessing on the straight-bar machines is used to weave can be provided with the needle-bar of knitting needle and carries out thereon reciprocating motion along arranging.Drive the drive motor of such carriage in flat knitting machine, used servomotor, and be called as main motor, as the motive power of braid action.
On straight-bar machines, be directed to weave pattern along with the knitting needle of applied load maximum, need the nominal value of selected motor for driving triangular frame, so that have enough output.Generally, the continuous nominal value that the motor knack is used surely continuously, and the nominal value at intermittence that can use the short time.When electric drive motor, produce electric loss and mechanical loss and heating.Selecting of motor for driving triangular frame is that peak load for example is about 80% of continuous nominal value.Even for the user of straight-bar machines at any braided fabric of knitting the width of cloth or decorative pattern of scope braiding that can weave, the heating of motor also is no more than the heat resisting temperature of electric insulation etc., does not also shorten the life-span of motor.
On cam carrier, load the braiding cam, and also loaded selecting mechanism.When arrangement be arranged on the needle-bar each knitting needle cam carrier by the time when having been selected by needle selection mechanism, be subjected to weaving action of cam.According to braided fabric knit the width of cloth and weave pattern is carried out the selection of knitting needle.In the braiding of common braided fabric, the rate of load condensate of motor for driving triangular frame, when with above-mentioned nominal value chosen the time, can only reach nominal value about 50～70%.Frequency of utilization with the peak load braiding is lower.The motor that motor that nominal value is big and nominal value are little compares the big price height of its volume.With selected to motor for driving triangular frame of peak load and condition with abundant output, be to have selected the high motor of large-scale price for the condition of rareness.
On the honing machine of machined mechanical field, when servomotor is used to drive the grinding stone extension fixture, carry out the technology formerly of servomotor load monitoring, open shown in the clear 60-217059 communique (Japan's patent disclosure communique clear and 60 years No. 217059) as the spy.On honing machine, grinding stone is shunk and insert in the machining hole with the state of little external diameter, then make servomotor is rotated at a high speed and expand grinding stone sharp up to its machining hole inwall of contact.When grinding stone contacts with machining hole quite hastily, grinding stone has been applied very big load or impact, the destruction of grinding stone is taken place sometimes or reduce machinability.At this formerly in the technology, the rotation of servomotor is transformed into low speed so that can with the rapid rising of loading detect contacting of grinding stone and inwall and in the cutting feeding with low speed expansion grinding stone.But this formerly in the technology to the supervision of servomotor load, be not in order to prevent to shorten the protection in servomotor life-span, but for protection to the grinding stone that driven by servomotor.
Summary of the invention
Even the object of the present invention is to provide a kind of cheap motor of having selected the nominal value that matches with common applied load, with braiding such as peak load the time, also can prevent control device because of the motor for driving triangular frame of the straight-bar machines in shortening life-span of heating etc.
According to the present invention, the control device along the drive motor of the cam carrier of the straight-bar machines of needle-bar walking comprises output circuit, monitoring circuit and holding circuit.Output circuit can apply output power to motor for driving triangular frame.Monitoring circuit owing to can monitor the load of motor for driving triangular frame, can detect the situation that the load of motor for driving triangular frame surpasses predefined benchmark.Holding circuit when the load of motor for driving triangular frame surpasses predefined benchmark, reduces the output power that puts on motor for driving triangular frame from output circuit.Because motor for driving triangular frame; reduce rotary speed by reducing the output power that is applied; reduce the speed of travel of cam carrier and alleviated load, so, can protect motor for driving triangular frame according to the heating that causes by excessive loads.Because holding circuit can be controlled output circuit; as long as make the hyper-base standard of in the output that reduces motor for driving triangular frame, loading not just recover output power; if so there is not necessity of protection; then carve the rotary speed of recovering motor for driving triangular frame; recover the speed of travel of cam carrier, can avoid the reduction of productivity ratio.As motor for driving triangular frame, can select and cheap the motor employed usually and nominal value that load matches, and carve use expeditiously.When weaving, can monitor load, and can prevent because of use the shortening of the heating equivalent life that produces continuously with the load bigger than nominal value with peak load.
According to the present invention, the reduction of the output power that motor for driving triangular frame is applied by output circuit is to finish to carry out in the walking of later next row monitoring cam carrier walking that load surpasses benchmark.Owing in the row in braid movement, do not change the condition that drives cam carrier, the long grade of needle tracking line cover that can avoid having woven changes, makes the outward appearance of braided fabric to worsen in row.
According to the present invention, the reduction of the output power that motor for driving triangular frame is applied from output circuit is carried out in the mode of the maximum speed of travel that reduces cam carrier.By reducing the maximum speed of travel of cam carrier, carve the sliding friction load that alleviates the needed load of the driving that is used for knitting needle needle selection and braid movement and produce along with walking.
According to the present invention, the reduction of the output power that motor for driving triangular frame is applied from output circuit is carried out in the mode of the acceleration that reduces cam carrier.During the direction of outside knitting width of cloth scope, walking counter-rotating,,, can lighten the load by reducing acceleration though cam carrier need be accelerated to the maximum speed of travel from halted state.
According to the present invention, because monitoring circuit, the average load rate in the stipulated time is monitored as load, so, not only for each knitting needle load change of moment, and the user mode of the motor that needs protection for reflection and monitor load.
According to the present invention, owing to holding circuit reduces output power or recovers output power with the multistage output circuit of controlling lentamente, so, can avoid the drastic change of cam carrier walking states, can reduce influence to the braided fabric woven condition.
According to the present invention; because holding circuit can be according to the size of the load that monitoring circuit monitored; change puts on the reduction degree of the output power of motor for driving triangular frame from output circuit, so, can realize reducing output power according to the necessity of protection.
Description of drawings
Fig. 1 is the front view that possesses as the straight-bar machines 1 summary surface structure of the control device of the motor for driving triangular frame of one embodiment of the present of invention.
Fig. 2 is while the flow chart of protecting the example that uses the control motor for driving triangular frame with the controller 9 of straight-bar machines 1 shown in Figure 1.
Fig. 3 a is expression changes the speed of travel of motor for driving triangular frame before changing for protection a time diagram;
Fig. 3 b is the time diagram that expression is changed in the mode that reduces maximal rate and the speed of travel when realizing the motor for driving triangular frame protection changes;
Fig. 3 c is the time diagram that expression is changed in the mode that reduces acceleration and the speed of travel when realizing the motor for driving triangular frame protection changes.
Fig. 3 d is the time diagram that expression is changed in the mode that reduces maximal rate and acceleration and the speed of travel when realizing the protection of motor for driving triangular frame changes.
Among the figure: 1-straight-bar machines, 2-needle-bar, 3-tooth mouth, 4-cam carrier, 9-controller, 10-main motor, 13-servo amplifier, 14-torque watch-dog, 15-holding circuit.
The specific embodiment
Fig. 1 is the summary appearance assumption diagram as the straight-bar machines 1 of one embodiment of the present of invention.Straight-bar machines 1 possesses needle-bar 2 in front and back, it stands facing each other in the tooth mouth 3 of centre.On the needle-bar 2 of front and back, be respectively equipped with cam carrier 4, the cam carrier 4 before and after the part of tooth mouth 3 links with bridge 5.Cam carrier 4, the length direction along the needle-bar 2 of figure left and right directions can be driven with back and forth walking.Above tooth mouth 3, set up a plurality of yarns road track 6.On yarn road track 6,, can support as furnisher from the supply part of knitting yarn to tooth mouth 3 that supply with though omitted diagram with walking.Bridge 5 is set to stride across yarn road track 6, can be from a plurality of central furnishers selecting and make its interlock.When carrying out plating-knitted the grade, also one group of selecting mechanism and cam mechanism are made a plurality of furnisher interlocks.On each furnisher, for yarn mechanism, supply with knitting yarn from knitting yarn tapered bobbin 7 by top spring assembly 8 grades.
On needle-bar 2, arrange and be provided with many knitting needles, carry out selectable braid movement with the selecting mechanism and the cam mechanism that are loaded on the cam carrier 4.Braid movement is to repeat to make the hook of knitting needle front end to debouch tooth mouth 3 and will introduce needle-bar 2 from the knitting yarn that furnisher is supplied with.On cam carrier 4, loaded the selecting mechanism or the cam mechanism of one or more systems.When on cam carrier 4, having loaded the cam mechanism of a plurality of systems, can make this a plurality of furnisher interlocks, just can weave the braided fabric of a plurality of rows with cam carrier 4 walking once.The braiding of braided fabric is according to being undertaken by the control of having imported the controller 9 of making weave data in advance.
The reciprocal walking of cam carrier 4, the main motor 10 that is used as motor for driving triangular frame drives.On cam carrier 4, connected the driving belt 11 that for example is provided with along needle-bar 2, the revolving force of main motor 10 is converted to the driving force of straight line by the transmission mechanism 12 that comprises synchronous belt.Utilize the conversion of main motor 10 direction of rotation, carry out the conversion of cam carrier 4 direction of travel.
On main motor 10, used servomotor.Controller 9 comprises servo amplifier 13, torque watch-dog 14 and holding circuit 15.Servo amplifier 13 has the function that is used for main motor 10 is supplied with the output circuit of output power.Torque watch-dog 14, the output torque of the main motor 10 that will be directly proportional with the output power of servo amplifier 13 detects, has the function of monitoring circuit as load.
Fig. 2 is the controller 9 with straight-bar machines 1 shown in Figure 1, while protect the example of the control of using main motor 10.This control was carried out in each processing cycle of controller 9.If will carry out through the stipulated time in the average load torque calculation that step s1 carries out, the cycle of then handling is longer than this stipulated time.Stipulated time, for example can be about 30 seconds.
Reason is in the cycle throughout, and at first in step s1, through the stipulated time, torque watch-dog 14 carries out torque and monitors.In step s2, holding circuit 15 will monitor that result's the average load torque and a reference value of predefined safe load rate compare as torque watch-dog 14 then.This a reference value can be set at and for example is equivalent to be 80% of the continuous nominal value of prerequisite with the continuous main motor 10 that uses.In step s2, when being judged as the average load torque above the safe load rate, then in step s3, at initial value is that 1.0 speed reduces on the coefficient, multiply by for example 0.9 reduction rate, reduce coefficient with 0.9 as speed and carry out the speed restriction, and in step s4, carry out the demonstration in the speed reduction.Demonstration during speed reduces, for example, the display that is possessed on can controller 9 guidance panels with straight-bar machines 1 shows, or shows with the glittering indicator lamp of being located at straight-bar machines 1 top.
In addition, reduction rate for example can be set with 0.1 scale in 0.1～1.0 scope.The safe load rate for example can be set with 5% scale in 50%～80% scope of continuous nominal value.On motor, surpass 100% of continuous nominal value even also have, also can be for example bear the so-called intermittently nominal value in 200 seconds etc. with 150% short time.Therefore,, so long as short time in the nominal value intermittently, also can not shorten the life-span of motor, and can drive cam carrier 4 with the output that meets the load that moment increases even applied the load torque that surpasses the safe load rate.
When judging that in step s2 the average load torque does not surpass the safe load rate, then in step s5 speed being reduced coefficient settings is 1.0 of initial value.As speed being reduced coefficient settings is 1.0 situation, is meant when judging that in step s2 situation and average load torque that the average load torque fully surpasses the safe load rate temporarily surpass the safe load rate, return to the situation that the average load torque is no more than the safe load rate to reduce alleviating of braiding speed afterload.Under the average load torque had recovered later situation, it was 1.0 that speed is reduced coefficient settings, was meant that the speed that will multiply by reduction rate and be lowered in step s3 reduces coefficient, returns to the meaning of initial value.
After step s4 or step s5 end, in step s6, the speed that multiply by and calculate on the command speed of controller 9 indications reduces coefficient, and the braiding speed of cam carrier 4 walkings is reflected on each row.That is, be among the step s1 the average load torque calculation constantly if cam carrier 4 in walking, the then braiding speed in step s6 reflection is that row in the walking finishes and from the walking reflection constantly of next row.In the row in braid movement, owing to do not change the condition that drives cam carrier, the long grade of needle tracking line cover that can avoid being woven changes in row.
In addition, speed restriction or the speed in step s5 in step s3 are recovered, though can carry out with processing once, also can be divided into repeatedly, it is changed gradually.Owing to can carry out the reduction of output power or the recovery of output power gradually with multistage,, can reduce influence to the braided fabric woven condition so avoided the drastic change of cam carrier 4 walking states.In addition, can decide once or several times according to the degree that the average load torque that utilizes torque watch-dog 14 to calculate surpasses the full load rate and change.Because the payload that monitors according to torque watch-dog 14 changes the reduction degree that puts on the output power of main motor 10 from servo amplifier 13, so can realize the reduction of output power according to the necessity of protection.
And the load of main motor 10 though monitor by the output torque of torque watch-dog 14 detections, also can for example detect, monitor the surface temperature of main motor 10.In addition, because controller 9 is controlled the braid movement of main motor 10 and knitting needle according to weave data, thus also can be according to the state of a control calculated load, and also can only calculate the average load torque.
As mentioned above; because the holding circuit 15 of controller 9; feedback is as the rate of load condensate of the main motor 10 of motor for driving triangular frame; when having increased induction-motor load because of Weaving pattern; in the braiding of next row, reduce the output of the main motor 10 that is used to make cam carrier 4 walkings, shorten the life-span so can prevent motor 10 heatings.As main motor 10, even selected the cheap motor of the nominal value that meets common use output, when the braiding carried out with peak load, also can protect lightening the load, so can avoid the lost of life because of heating.
Fig. 3 a and Fig. 3 b are illustrated respectively in reduction rate among the step s3 of Fig. 2 and are the variation that 0.9 o'clock the cam carrier speed of travel reaches the later speed of travel of the speed that changed before changing.Cam carrier 4 when the direction counter-rotating of back and forth walking, quickens after temporarily stopping, and slows down later on keeping the maximum speed of travel.In the speed shown in Fig. 3 a before changing, the maximum speed of travel is maximum braiding speed V, and in the change of the speed shown in Fig. 3 b, the maximum speed of travel is reduced to 0.9V.Can alleviate the load that is applied during cam carrier 4 is walked with the maximum speed of travel with the reduction of the speed of travel.
In addition, alleviate, shown in Fig. 3 c, also can carry out the change of acceleration as the load of the main motor 10 of motor for driving triangular frame.That is, before changing, shown in Fig. 3 a, can reach maximum braiding speed V and quicken through time t1 from halted state, but shown in Fig. 3 c, use the time t2 longer to reach maximum braiding speed V, then can reduce the load when quickening than time t1 if reduce acceleration.And, shown in Fig. 3 d, change speed and acceleration simultaneously, the maximum speed of travel that reaches with the time t3 longer than time t1 can be reduced to 0.9V.
Claims (7)
1. the control device of the motor for driving triangular frame of a straight-bar machines is along the control device of the drive motor of the cam carrier of the straight-bar machines of needle-bar walking, it is characterized in that, comprising:
Can to motor for driving triangular frame apply output power output circuit,
Monitor motor for driving triangular frame load monitoring circuit and
Holding circuit; this holding circuit; the control output circuit is also protected motor for driving triangular frame; make when the load by the motor for driving triangular frame that monitoring circuit monitored surpasses predefined benchmark; reduction puts on the output power of motor for driving triangular frame from output circuit; and in output reduces, just return output power as long as load is no more than benchmark.
2. the control device of the motor for driving triangular frame of straight-bar machines according to claim 1, it is characterized in that: the reduction of the output power that described motor for driving triangular frame is applied by described output circuit is to finish to carry out in the walking of later next row monitoring cam carrier walking that load surpasses described benchmark.
3. the control device of the motor for driving triangular frame of straight-bar machines according to claim 2, it is characterized in that: the reduction of the output power that described motor for driving triangular frame is applied from described output circuit, carry out in the mode of the maximum speed of travel that reduces cam carrier.
4. according to the control device of the motor for driving triangular frame of claim 2 or 3 described straight-bar machines, it is characterized in that: the reduction of the output power that described motor for driving triangular frame is applied from described output circuit, carry out in the mode of the acceleration that reduces cam carrier.
5. the control device of the motor for driving triangular frame of straight-bar machines according to claim 1, it is characterized in that: described monitoring circuit monitors the average load rate in the stipulated time as described load.
6. the control device of the motor for driving triangular frame of straight-bar machines according to claim 1 is characterized in that: described holding circuit, and control described output circuit lentamente and reduce described output power or recover described output power with multistage.
7. the control device of the motor for driving triangular frame of straight-bar machines according to claim 1; it is characterized in that: described holding circuit; according to the size of the load that described monitoring circuit monitored, change the reduction degree that puts on the output power of described motor for driving triangular frame from described output circuit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006033711 | 2006-02-10 | ||
| JP2006033711A JP2007211381A (en) | 2006-02-10 | 2006-02-10 | Controller for motor for driving carriage of flat knitting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101016672A true CN101016672A (en) | 2007-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710003955 Pending CN101016672A (en) | 2006-02-10 | 2007-01-19 | Control device of motor for driving triangular frame of flat knitting machine |
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|---|---|
| JP (1) | JP2007211381A (en) |
| CN (1) | CN101016672A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071528A (en) * | 2010-05-31 | 2011-05-25 | 宁波普罗蒂电脑横机有限公司 | Computer flat knitting machine of multi-level pin selection pattern transformation and control device thereof |
| CN108360148A (en) * | 2018-03-30 | 2018-08-03 | 湖州泰鑫无纺布有限公司 | Multifunctional textile device |
| CN108367692A (en) * | 2015-12-09 | 2018-08-03 | 川崎重工业株式会社 | Controller for railway vehicle, train marshalling list and main motor control method |
-
2006
- 2006-02-10 JP JP2006033711A patent/JP2007211381A/en active Pending
-
2007
- 2007-01-19 CN CN 200710003955 patent/CN101016672A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102071528A (en) * | 2010-05-31 | 2011-05-25 | 宁波普罗蒂电脑横机有限公司 | Computer flat knitting machine of multi-level pin selection pattern transformation and control device thereof |
| CN108367692A (en) * | 2015-12-09 | 2018-08-03 | 川崎重工业株式会社 | Controller for railway vehicle, train marshalling list and main motor control method |
| CN108367692B (en) * | 2015-12-09 | 2021-08-03 | 川崎重工业株式会社 | Railway vehicle control device, train consist, and main motor control method |
| CN108360148A (en) * | 2018-03-30 | 2018-08-03 | 湖州泰鑫无纺布有限公司 | Multifunctional textile device |
| CN108360148B (en) * | 2018-03-30 | 2023-12-12 | 东阳市天毅工贸有限公司 | Multifunctional textile device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2007211381A (en) | 2007-08-23 |
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Open date: 20070815 |