DE2044358C3 - Device for regulating the speed of ring or spindle banks - Google Patents

Description

appear more pleasant, the higher the banking speed is. In addition, there is not * that PI or The property of PID controllers is that they control the duration of the delay and acceleration phase Goch extend considerably.

To accelerate a ring rail at the lower and upper reversal points it is for drives for Ring banks, in which the upward and downward movement of the ring rail with a mechanical heart eccentric Is positively controlled, known, an indentation at the deepest point of the heart eccentric and to provide a point at the highest point (MELLIAND TEXTIL-REICHTE 5/1969, pages 504 to 508). In this prior publication, this measure is described as extremely bad, and it should be pointed out that these designs of the heart eccentric are also mostly not effective because the s: ± rolling on the eccentric Roll over it.

The object of the invention is, in a device for controlling the speed of ring or Spindle banks the length of time at the lower and / or upper reversal of the respective Bank to shorten the deceleration and acceleration phases that occur and so the ones mentioned above To counter irregularities in the winding structure.

This object is achieved by the features specified in claim 1.

As a result of the setpoint increase, the duration of the deceleration and acceleration phases increases the upper and lower reversal parts are shortened considerably, thus eliminating the aforementioned irregularities is effectively countered in the winding structure.

It is advantageous if the maximum of the setpoint increase is at least 60 to 10%, preferably is at least 140% of the not excessive setpoint as it is after the setpoint increase has ended takes effect.

The duration of the deceleration and acceleration phases of the bank can be increased without difficulty less than half the time required without a setpoint increase. So revealed For example, when taking measurements on a draw twister from the applicant whose ring rail has a had a maximum stroke of 450 mm and a minimum duration of a stroke of 6 seconds, in this case Maximum stroke of the set minimum duration of the stroke, the following values: Duration of the delay and acceleration phase without setpoint increase approx. 200 milliseconds. At the In the second attempt, the new setpoint during the deceleration and acceleration phase was given a setpoint increase of approximately 140% of the not excessive setpoint added. There was then a period of delay and Acceleration phase of about 80 milliseconds.

The nominal value of the ring rail speed is generally known for both the upward movement as well as for the downward movement of the ring rail adjustable to different values, whereby the setpoint set in each case can be constant or slowly varied over time.

It can expediently be provided for the amplitude and / or the time profile of the setpoint increase to make adjustable.

When designing the device according to An

Claim 2 is achieved that the setpoint increases the different physical conditions of the speed change at the top and lower reversing positions can be adjusted. Will the

Measure according to claim 3 provided, the drive device to carry out the Change in direction of the bench, the greater the bench speed, the greater the power automatically is. By following the design

»O Claim 4 provides, a minimum duration of the movement reversal, determined for example by mechanical conditions, can be maintained for all settings.
The setpoint increase can be applied to any

¹ S can be generated in a suitable manner, also with electronic means. The additional SoU value can be obtained in a particularly simple manner by the configuration according to claim 6. The differentiation can be done with an RC circuit in a way that is known per se

^ao way to be made. Such an RC circuit represents a function generator. Of course, other function generators can also be used to generate the additional setpoint, which are designed so that the radio generated by them

^a 5 tion is automatically adapted to the size of the respective setpoint.

In a preferred embodiment, the measure according to claim 7 is provided, whereby on makes it easy to ensure that the setpoint increase at the latest with the end of the acceleration phase ends.

If the new, not excessive SoU value of the If the actual value of the bank speed deviates considerably, the measure according to claim 8 can be provided an additional setpoint is automatically added to the new setpoint as long as this Difference exceeds a certain, adjustable threshold value. For this purpose, the difference value a threshold value transmitter, for example a mor.ostable multivibrator can be switched on with whichever is then superimposed on the new SoU value, as long as the threshold value is superimposed of the threshold value transmitter is exceeded.

Exemplary embodiments of the invention are shown in the drawing. It shows

Fig. 1 is a schematic representation of the drive of a ring rail of a draw twisting machine, with associated Control device for controlling the ring So bank speed, the control device in Block diagram is shown

2 shows a time-speed diagram for explaining the mode of operation of the regulating device according to Fig. 1,

3 shows a second exemplary embodiment of the regulating device for regulating the speed of ring or spindle banks in block connection,

FIG. 4 shows a diagram to explain the mode of operation of the control device according to FIG. 3, wherein

this diagram shows the output voltage of the setpoint generator device and the DC voltage of the Actual value transmitter shows over time.

The drive shown in Fig. 1 for a ring rail 7 shown in detail has a hy-

hydraulic piston-cylinder unit 10, the cylinder 9 stationary and the piston with the associated Piston rod 11 is loaded with a switching valve 12 that can be switched by the limit switches 13, 14

The path can be reversed, the two working setpoints being switched on as setpoint increases in an ad chamber of the cylinder 9 alternately with a dier stage 35. The setpoint value via pump 16, which can be driven by a motor 15, under increasing means 33, generates the additional setpoint pressure liquid which is supplied from a storage container 17 at the upper reversal point of the ring rail movement. The working space of the setpoint value at the lower reversal point, which is not pressurized from the each and the setpoint increase means 34 for the additional time, is not pressurized.
The outflows of the two setpoint increase directional control valve 12 and one of the actuating device 18 means 33, 34 with the flow control valve 19 that can be actuated by the limit switches 13 are returned to the reservoir 14 together with the changeover switch 30. The setting of the quantity control i ° switching device 36 alternately of the adder valve 19 determines the speed of the piston can be switched on. Each setpoint increase means 33,34 of the piston-cylinder unit 10 and thus the stroke generated in this embodiment, the speed of the ring rail 7, which rod 11 is moved from the KoI an output signal of constant, adjustable size by a lever 20, if the voltage of a voltage source 37 is applied to its input so that it can pivot at a fixed bearing point at 21. This parallel chip bearing t is. The limit switches 13, 14 can in itself voltage source 37 is connected to the input of a locking stage in a known manner for adjusting the position of the reverse 38, which always then the forwarding position of the ring rail movement parallel to the axis of the DC voltage of the voltage source 37 to that of the piston rod are adjusted. The position of the inputs of the additional setpoint generator 33, 34 blocks the limit switch 14 determines the position of the upper switch if its two control inputs 39, 40 are voltage-free reversing point of the ring rail 7 and the position of the end switch. On the other hand, this blocking stage 38 is always open switch 13 determines the position of the lower reversing net when one of its two control inputs is located at the ring rail. The speed at which both control inputs are excited. Your control input ring rail is continuously connected with an actual value transmitter 40 is connected to a pulse generator 41, which measures 22, which measures the speed of a rod 23 firmly connected to the ring rail 7 each time a limit switch is actuated. The and 14 at its output a pulse constant actual value transmitter can generate an inductive speed adjustable time length, this pulse measuring device or a tachometer generator, the time length is made so that it is approximately the time that its output signal is independent of the duration of the the reversal of the direction of movement dei from the direction of the ring rail movement always has the same polarity at the lower and upper reversal point and thus corresponds proportionally to the delay phase that occurs. The absolute value of the ring bench speed is. The other control input 39 of the blocking stage 38 is connected to the output of the actual value transmitter 22, a control output of a threshold value stage 43 is connected, the difference stage 24 forming the softness and furthermore an output voltage to keep a further differential stage 25 open, its 35 the locking stage 38 delivers if the task in the difference is explained in more detail below. level 25 difference between that of derr

The regulating device also has the setpoint generator 31, 32 which is activated as a whole in each case

with 26 designated setpoint generator and a controller th setpoint and that of the actual value generator 22 gelie

27, which is useful as a PI controller or PID-controlled actual value via an adjustable positive variable

ler can be trained. The input of the controller 40 advances. As long as this difference is below de;

27, the system deviation remains at the threshold value of the threshold value stage 43 in a known manner, is ihi

pressed, which depending on the polarity and output is de-energized.

Size of the control deviation at its output on Let the mode of operation of this control device be ar Control signal generated, which explains the adjusting device 18 of the hand of the diagram of FIG. 2 in more detail Volume control valve is pressed. 45 In the diagram according to FIG. 2, the abscissa corresponds to The greater the positive control deviation, the greater the time t and the ordinate ν of the speed de!

Furthermore, the volume control valve is open and ent- Setpoint and the speed of the actual value dei

Speaking, the greater the speed becomes bank speed. The full curve "

the ring rail set automatically. On the other hand, the larger the output of the adder 35 corresponds to the target

gen the negative control deviation, the stronger 50 value transmitter device 26. The dashed curve

will show through the quantity regulation of the stretching flask which is fed to the input of the adding station

Liquid throttled and accordingly the ring not excessive SoD values of the two Soflwertgebei

Belt speed slowed down because the regulation decrease 31 and 32 during the increase in temperature.

The sarchpanMerteaKarven 50 to 53 represent the

value oad Soflwei * the ring bank speed windigkert 55 Actual value of the ring bank speed during the

is equivalent to. Vereögerangs- aod Bescuignngspaasen the ring

The SOHwertgeber 26 assigns SOTeidarch a Umbank 7 as the reversal of the movement path

switch 3 «represents setpoint adjuster that can be switched on alternately.

31, 32 anf, of which the SoBwertgeber 3IdCTSoH- While the at the points β and i> switched on

value fw the speed of the downward movement 60th reversal of movement of the bank 7 is zanäehst ie

the ring bank? and the setpoint generator 32 the Ge Bansuindigkeit Ms aaf Nafl hesitant so dal

scfawindigfceit Kr the forward movement of the ring- the abste ^ enderi, sBichpanktierten carven branches 50, SJ

drank well. Furthermore, the delays depend on the actual value of the bank account

Means 33, 34 are provided, which are the production of rank phase darsCeflea. According to your ge

Additional values are used, which means that during the 65 speed values, the bank 7 is aaf dei

the reversal of the Rmgoank movement aafrrefeäs nenen SoBwert 46; 47 condemned, so daf

At the end of the delay phases or phases of employment, the rising, dashed vein branches 52.5:

of the ring bench represent the Beschleamgongphase of the bank 7 as instructed by the SoHw bei n. U.N

the duration of the deceleration and acceleration phases 50,52; To abbreviate 51.53 is during of these phases the newly set target value 46, 47 by additive superimposition of the assigned, Additional setpoint values 48, 49 indicated by hatching are exaggerated, so that the setpoint value effective here corresponds to the curve areas 54, 55 corresponds.

In this example, the curve areas 46 correspond to the setpoint value of the bank speed during the respective downward movement of the ring rail. This setpoint is higher than that during the upward movement adjusted setpoint 47. The setpoint 46 is constant, whereas the setpoint 47 during the Duration of the upward movement of the ring rail is steadily increased by a small amount. The steady increase is not visible in the diagram, as it only shows very brief sections.

When the ring rail 7 has reached its lower reversal point (a. Fig. 2), the limit switch 13 is actuated. As a result, the changeover valve 12, the changeover switch 30 and the changeover device 36 are switched over at the same time, so that the setpoint generator 32 and the setpoint increase means 34 are connected to the adder 35. The actuation of the limit switch 13 simultaneously excites the pulse generator 41 to emit a pulse which lasts for 50 milliseconds, for example. As a result, the locking stage 38 is opened and the setpoint increasing means 34 is energized, so that an additional setpoint 48 of constant magnitude is added to the setpoint 47 (FIG the difference stage 24 the difference between this excessive setpoint and the actual value of the bank speed is formed and the controller 27 is pressed, which in turn generates a control signal with regard to the large positive control deviation, which opens the volume control valve 19 correspondingly wide, so that the ring rail speed initially very quickly is delayed (50, Fig. 2) and then accelerated very quickly in the new direction of movement. When the output of the pulse generator 41 is de-energized, there is already a considerable difference between the setpoint 47 occurring at the output of the setpoint generator 32 and the actual value 50.52 of the bank speed, since at this point in time the bank speed is close to its zero value. The threshold value stage 43 therefore supplies an output voltage which continues to hold the blocking stage 38 open, so that the setpoint increase continues. During the acceleration phase 52, the input voltage of the threshold stage 43 decreases very quickly as a result of the rapid acceleration of the ring bank, and if this input voltage falls below a certain, small distance, the output of the threshold stage 43 is de-energized, so that the blocking stage 38 blocks the output of the target value excess means 34 is de-energized (c, Fig. 2). The new SoD value 47 ailetn specified by the setpoint generator 32 is now effective, and the speed of the upward movement of the ring rail is thus determined solely by the setpoint 47 of this solver generator 32.

When the ring rail 7 reaches its upper turning point has, (6, Fig. 2) the limit switch 14 is actuated, whereby at the same time the switching valve 12, the Changeover switch 30 and the changeover device 36 are switched over, so that now the setpoint generator 31 and the setpoint increase means 33 are connected to the adder 35.

At the same time, the pulse generator 41 generates a pulse that opens the locking stage 38, so that the setpoint generator 33 generates the additional setpoint 49 (Fig. 2), which through the interaction of the components 41, 25, 43 and 38 to point d shortly before the end of the Deceleration and acceleration phase

»O is held right.

The described setpoint increases are repeated with all reversal movements of the ring rail. The setpoint increases 48, 49 are at the lower and upper reversal points of the ring rail

^J 5 movement to adapt to the differently sized setpoints of different sizes.

The control device according to FIG. 3 is for a drive device of a ring rail or spindle rail determines at which, instead of the one shown in Fig. 1

*> Provided separate valves 12 and 19 a single one Servo valve 60 is provided, which combines the function of the two valves 12 and 19 by being dependent on the polarity of the setpoint voltage 61 (Fig. 4) the up and down direction of the bank

^a 5 adjusts automatically, the speed of the bank being adjusted to higher values, the higher the setpoint voltage of the polarity in question.

For this purpose, the control device according to FIG. 3 has an actual value transmitter 22 ′ for the actual value 62 (Fig. 4) the bank speed and a setpoint generator 26 ', which generate DC voltage signals, which are positive in one direction of movement of the bench and in the other direction of movement are each negative.

The setpoint generator 26 'shown has one at a constant positive potential and one at one constant negative potential lying conductors 63 and 64, which with one of the reversal of motion the ring rail at the upper and lower reversing points causing limit switches Changeover switch 65 connected alternately to the same side of a potentiometer 68 via resistors 66, 67 can be, by tapping 69 different ratios of the sizes of the speed setpoints can be adjusted in both directions of movement of the bench. Both setpoint values are in the middle position of tap 69 same size. Rectifiers are connected to tap 69

so two circuits 72, 73 are connected, the outputs of which are connected to a setpoint amplifier 74 are. The two rectifiers cause that depending on the position of the switch β5 one or the other the other of the two circuits 72,73 is excited, with the setpoint in one direction of movement Bank speed through circuit 72 and in the other direction of travel through circuit 73 is determined. Each circuit 72, 73 has two parallel branches 75, 76 and 77, 78, respectively.

So there is one resistor in each of the branches 75.77 79.80 and one non-linear in each of the branches 76.78 Function sensors 81, 82 are arranged. This Function generators 81, 82 are used to generate the Solr value excesses 83, 84 (Fig. 4) and can for example each have an RC circuit, which in the wake of each actuation of the switch 65 by Differentiate the steep rise in time of the nei applied setpoint voltage from a short-term, the

Setpoint increase 83.84 causing, decaying over time Generate voltage pulse, which of the constant, across the resistor 79; 80 to the setpoint amplifier 74 arriving, not excessive setpoint voltage 85 or 86 (FIG. 4) is added will. After the decay by the non-linear function generator 81; 82 generated voltage pulse 83; 84 is this function generator having current branch 76; 78 inactive, so that the effective Setpoint value solely by means of the setpoint amplifier 74 arriving via the current branch 75, the current branch 77 Voltage is determined. The outputs of the setpoint amplifier 74 and the actual value transmitter are a control amplifier 90 with PI behavior. A control signal is formed from their difference, which after amplification in a power amplifier 91 controls the servo valve 60 so that the bank speed according to the respective Setpoint is regulated.

All amplifiers 74, 90, 91 of this control device are DC voltage amplifiers, their output voltages have the same polarity as their input voltages in the steady state.

In the diagram of FIG. 4, the direct voltages impressed on the input of the control amplifier 74 are shown graphically, with 61 denoting the setpoint voltage and 62 denoting the actual value voltage. The abscissa corresponds to time t. In this diagram, a switchover from an upward stroke of the bank to a downward stroke takes place at point a ' and a switchover from the downward stroke to an upward stroke takes place at point b'.

As a result of each such switching process, the new setpoint is switched on immediately, d. H. either the circuit 72 or the circuit 73 applied to positive or negative voltage. the

S causes a steep increase in voltage that occurs here as described, the brief voltage increase 83, 84 by the relevant function generator 81.82, where the amplitude and the time course of the voltage increase in question are as follows

ίο is taken that the desired shortening of Time duration of the deceleration and acceleration phase of the bank results. The individual can Function generator be designed so that the amplitude of its voltage signal is proportional to the Size of the setpoint voltage that sets in after its decay for all adjustable setpoint voltages is.

The length of the voltage surge generated by the function generator 81, 82 is such that

ao they approximate the duration of the delay and Acceleration phase of the bank at the relevant reversal point corresponds to its trajectory. The voltage surge generated by the function generator is expediently set so that it becomes independent the deceleration and acceleration phase depend on the size of the setpoint results.

As can be seen from the diagram in FIG. 4, the control device in this preferred embodiment Example designed so that a constant difference in both directions of movement of the bank is regulated between the setpoint voltage and the actual value voltage.

For this purpose 2 sheets of drawings

Claims (5)

In textile machines in which threads, game or twisted threads are wound onto sleeves that are attached to the claims: Solenoid shafts from textile spindles 1. Device for regulating the Gfsdiwindig- na ^ eschlepptenl on a spinning or twisting ring wedge wound by drive devices movable nacag ^ ν ^^ _{> W} q _TO which the ring or spindle banks of text machines, jgf ^ _nde spindle shaft rotates. The Spindeibei which arranged the bank speed besam- β j ^^ A ^ _{n on} ring rails, the Mende SteUgröße _mdelbaflken automatically to ge to "" _{to s.} To effect the values eingesteUt, the large the Drfferenz ap _updraft s of the thread is a winding between the vorgege- of a setpoint generator only _{erfoider, cozy} relative movement between the surrounded SoUwert and by a "wertgeDer .T, _elbank" d _{of the} ring rail ap ^ ^ _{bank para} Uel is in most determined actual value of the bank speed, characterized in that the axis of the spindles, that the vornan- f _o f _au 7ti _end moves up and down. In some cases, at the point of toggling the notification device, ^ ^^ ^ ^^ ^ r ^^ ^ to the new direction of movement for aevorgese- _{ddbank was} continuously moved up and down. To the current value of the relevant sovereign j ™. Winding body of the desired; during _erh old at the upper and / or · ÄfgJJSiufoaiies ^, it is (31,32 26 ') known, the lower reversal points of the strokes of vvi * £ _{ness of Au} f and downward movement of the bank delay occurring and Bescmeu- _ef f _s bank (spindle rail or ring Bank) to nigungsphasen at least temporarily automatically £ _{"rules on} ser speed is beidurch setpoint boost means (33, M, '*> _D L _SW else particularly important in Streckzwirnmaschi- • 2) is inflated with those on a sleeve endless synthetic 2. Apparatus according to claim 1, since _twisted threads are wound up. The Rege Indicates that upper daden the SoUwertüberhöhungen of thread oa ^ rental manner (CH-PS 449,484) and lower reversal points of the bank ^a 5 lung enoig ^ ^^ desired value predetermines (which are kcnbewegung set differently> _{fcann or which for d, e} Aufwärtsbewe - 3. The apparatus of claim 1_, or £ DA swn downward movement of the Bank by in that the supply and SoUwertuberho- ^ ^^ ^ _{gegebenenfaUs also} hung automatically on the greater values adjustable scmeau ^ g ^ _{momemanen the} bar is, the larger the after the 3 »zeiUKn varu ^^ _{speed has ended, the} setpoint is continuously present when the setpoint is increased. _{Measures by a tachometer generator} . The dif- 4. Device according to a ^ r claims Ibis jpielswe ^ se _and ^^ ^ ^ 3, characterized in that the setpoint over- reference - ™phia ^ _{the egg of a controller} increase the setpoint automatically so adaptable £ ^ Stoiiid. at whose output a control signal that the time duration of the 7um at the reversal points of the 35 zugeiu "adjusting device adjusting Bank movement Verzogerungs- occurring and aιαιππ, _BA eschwindigkeit in the acceleration phases substantially inde-« ^nd Y ^ ™ ^ decreasing sense influenced, dependent on the size of of the setpoint et gÄ £ "J" is mostly a PI or PID controller. In 5. Device according to one of Claims cases IbB ° "S _s F serve as _a drive means 4, characterized in that, simultaneously with 4o most £ ™ J "hydraulic piston-cylinders switching the bank movement of Sollwer, ^ ^B 2 ^ ^a _with the inverse of the Bewewelcher after termination of the relevant target of the Ejnhe" en ^ ^ _{Errefchen def} value superelevation is effective, can be switched on and £ Jg »* ££ ^{a at the} _{turn of the} path of movement this SoUwert is temporarily superimposed with an additional limit switch that changes the SoUwertüberho-« derBajik £ P £ »äg also that of the respectively new loading ¹ T VoSuing according to claim 5 dadiuch g. -ß ^^^^^ indicates that the additional SoU value through or «™ g ^ ™ SSt of the ring bank is here Differentiating the temporal increase of the new ^ -D ^ ~ 5S ^ £ nnter B.u «t set, Setpoint by a p £ older-ergl.ed of the desired 5 »m. ^^^ _{omungsmenge of the} cylinder lige irregularities in the winding structure in The height of the reversal points of the bank movement arise. These irregularities can be all the more uneven