JP2009270249A5 - - Google Patents

Description

Spinning preparation machine

  The present invention relates to a spinning preparation machine according to the premise of claim 1, in particular a drawing machine comprising a drafting system for drafting and / or duplexing the supplied fiber material ( relates to a draw frame or carder machine or combing machine.

Such kind of spinning preparation machines are known in the art.
Single or multiple fiber slivers as fiber material fed to the spinning prep machine are homogenized by a draft system and the resulting fiber sliver is designed to be transferred into a can.
Generally, a drafting machine draft system includes a pair of upstream rollers (inlet rollers) arranged in a direction in which the fiber material before draft passes through the rollers, a pair of central rollers, and a pair of downstream rollers (outlet rollers). And have.
Each pair of rollers sandwiching the fiber material is designed to perform drafting (stretching) by rotating while sandwiching the fiber material at a higher rotational speed on the downstream side in the transport direction of the fiber material.
The draft area between the pair of upstream rollers and the pair of central rollers is known as the sub-draft area, and the draft area between the pair of central rollers and the pair of downstream rollers is known as the main draft area. .

Various methods are known for changing the draft, i.e. compensating for changes in the thickness of the fiber material in response to changes in the mass of the fiber sliver measured by the sensor means measuring the mass of the fiber sliver. .
In an autoleveler type drawing machine, when only adjusting the upstream side of the fiber transfer direction (adjustment at the inlet side), the rollers located below the pair of upstream rollers and the pair of central rollers, respectively Although the speed of the roller is adjusted, the speed of the lower roller of the pair of downstream rollers is designed not to be adjusted.
As a result, the fiber sliver is discharged from the draft system at a constant rate.
On the other hand, when only the adjustment on the downstream side in the fiber transfer direction (adjustment on the outlet side) is performed, the speed of the pair of upstream rollers and the pair of central rollers is kept constant after the spinning preparation machine has reached full speed. However, the speed of the pair of downstream rollers is controlled to compensate for fiber material irregularities.
In this specification, when referring to control or drive for a pair of rollers, it is meant that almost always only one of the pair of rollers is driven and the other follows its movement.

In the two methods described above, i.e., two methods for compensating for changes in the thickness of the fiber material, the mass being moved (the mass of the fiber material) or the moment of inertia of the mechanical component associated with this process is relatively large, There is a problem that the allowable change in frequency and amplitude related to the change in rotational speed is limited.
One remedy for this problem is known from the Applicant's German Patent No. 102004007143.
In this German patent 102004007143, the change of the fiber sliver is compensated for one partial amplitude of the measurement signal of the first control loop and for another partial amplitude of the other control loop. Designed.
In the specification of German Patent No. 102004007143, a high frequency component (that is, a short wavelength signal component) and a low frequency component (that is, a long wavelength signal component) are divided, and an adjustment mechanism on the upstream side and an adjustment mechanism on the downstream side are separated. Designed to improve the drafting capacity of the auto leveler drawing machine, as a result assigned to each.

German Patent No. 102004007143

  The object of the present invention is to improve the compensation for high frequency changes in the mass of the fiber sliver.

  The object of the invention is achieved by a spinning preparation machine with the features of claim 1.

  The present invention is independent of whether there are only two pairs of rollers and only one draft area or whether there are more than two draft areas, as in a typical draft system. It can be applied to any draft system.

In the present invention, a pair of downstream rollers (that is, a pair of outlet rollers in the case of a drawing machine) and a pair of calender rollers are rotated at a lower rotational speed and / or higher rotational speed than the storage means for at least a certain period. It is possible to drive, and it is possible to compensate for high-frequency defects (that is, short-wavelength defects) of the fiber sliver.
In this case, the storage means is designed not to follow changes in the rotational speeds of the pair of downstream rollers and the pair of calendar rollers, or at least to the same extent.
That is, it is preferable that the storage means, particularly the turntable is driven at a constant speed, or is driven in a range smaller than the range in which the pair of downstream rollers and the pair of calendar rollers change, that is, in the change range.

Therefore, in the present invention, the speeds of all the components installed on the downstream side of the main draft region do not change to the same extent, but the downstream roller (downstream cylinder, outlet cylinder) and the calendar roller (non-draft pulley). We propose a downstream adjustment mechanism that is only driven with large dynamic changes to compensate for high frequency changes in the mass of the fiber sliver.
In particular, it is preferable that the turntable and the cans (storage containers for fiber sliver) are designed to keep rotating at a basically constant speed.
Thus, the mass that is greatly changed dynamically is significantly reduced, resulting in a very beneficial improvement in the overall dynamic behavior, i.e. a significant change in the mass of the fiber sliver is suppressed, resulting in a spinning preparation. It is designed to significantly improve the work accuracy and work efficiency of the entire machine.

On the other hand, in a conventional drawing machine, in the case of a constant output speed (adjustment mechanism on the upstream side), it is necessary to change the speeds of all the components installed upstream of the main draft area, or constant In the case of the input speed (adjustment mechanism on the downstream side), there is a problem that it is necessary to change the speeds of all the constituent members installed on the downstream side of the main draft region.
The present invention has the effect that the speeds of the pair of downstream rollers (exit rollers) and the pair of calendar rollers and the speed of the structural members following these structural members, particularly the speed of the turntable, do not have to be completely matched with each other. Have.
The turntable is designed to be deliberately separated from the compensated speed change between the pair of downstream rollers and the pair of calendar rollers, or driven with less dynamic changes.

The control means, ie the processing unit, is preferably designed to drive the storage means at a constant speed during normal operation.
On the other hand, in order to compensate for low frequency (long wavelength) or high frequency (short wavelength) sliver failure, the pair of downstream rollers and the pair of calendar rollers are made slower or faster (larger Designed to drive (with dynamic changes).
And by limiting the change in high frequency (short wavelength) in the rotational speed to a low amplitude, draft defects resulting from the speed difference between the calender roller and the turntable or cans can be reduced in the quality of the fiber sliver and in the cans. It has been found that it does not adversely affect the storage pattern or has a negligible effect.

The adjustment mechanism on the downstream side is preferably designed to compensate for high frequency (short wavelength) changes in the mass of the fiber material of less than 20%, less than 15%, particularly preferably less than 10% of the specified mass. .
Also, the adjusting mechanism on the downstream side is preferably designed to compensate for changes in the fiber material having a frequency of 5 Hz or more, preferably 10 Hz or more.
In particular, according to the present invention, a defective signal component of a fiber sliver having a frequency of 10 Hz or more and a maximum deviation of 10% from the mass value is determined with respect to the storage pattern or the quality of the obtained fiber sliver. It has been found that it has no adverse effects.

Furthermore, as has been done with typical auto-leveler type drawing machines, it is more preferable to compensate for the low frequency component of the fiber sliver failure signal by an upstream adjustment mechanism.
Therefore, the spinning preparation machine according to the present invention includes a pair of central rollers between a pair of upstream rollers and a pair of downstream rollers.
When performing simple adjustment on the upstream side, the speed of the pair of upstream rollers and the pair of central rollers is controlled while maintaining a constant speed, and the pair of downstream rollers, the pair of calendar rollers, and the storing means are at a constant speed. It is driven.
In this case, the draft in the sub-draft region between the pair of upstream rollers and the pair of central rollers is constant, and the compensation for the change in mass is the main draft between the pair of central rollers and the pair of downstream rollers. Designed to be done within the area.
When the adjustment mechanism on the upstream side as described above is combined with the adjustment mechanism on the downstream side of the present invention, it is preferable that the pair of upstream rollers and the pair of central rollers continue to be driven with a certain sub-draft. That is, it is preferable that the pair of upstream rollers and the pair of central rollers are driven so as to constantly perform preliminary drafting.
In this case, the compensation for the high frequency change of the fiber material is designed to be performed in the main draft region.
That is, the control of each component as described above is designed so as to be realized by frequency allocation using a computer in the spinning preparation machine.
In the device design as described above, the storage means is continuously driven at a constant speed.

In one embodiment of the spinning prep machine of the present invention capable of compensating for both low and high frequency components within the main draft region, the low frequency components are the speeds of the pair of upstream rollers and the pair of central rollers. Preferably, the high frequency component is handled and compensated by linearly changing the speed of the pair of downstream rollers (exit rollers) and the pair of calendar rollers by changing with a hyperbolic function. .
It is preferable to take into account the phase displacement information of the fiber sliver material failure signal.

Instead of compensating for low and high frequency components within a single spinning prep machine, two spinning prep machines are run in series to compensate for such a working process, i.e. low and high frequency components. There is no problem even if it is designed to perform the above two work steps, that is, by two passing functions.
In this case, the first passing function is achieved by a typical auto-leveler type drawing machine provided with an adjusting mechanism on the upstream side, and the second passing function is the short-term adjustment described above, that is, the adjusting mechanism on the downstream side. It may be designed to be achieved with a spinning preparation machine equipped with
In addition, the order of these two passing functions may be replaced.

  More preferred embodiments of the invention are achieved by the features of the dependent claims.

  The present invention will be described in detail below with reference to the drawings.

The side view which shows the conventional drawing machine. The side view which shows the spinning preparation machine designed as a drawing machine which is one Example of this invention. Explanatory drawing which shows the defect signal of a fiber sliver. The side view which shows the draft system provided with the discharge mechanism. Sectional drawing of the turntable which shows the state through which a fiber material passes along a long path | route. Sectional drawing of a turntable which shows the state through which a fiber material passes along a short path.

The basic operation of a conventional drawing machine having only an adjustment function on the upstream side will be described below with reference to FIG.
In this known drawing machine, a plurality of fiber slivers FB as fiber materials which are not substantially twisted are designed to be supplied to the draft system 4 in parallel.
In addition, you may design so that the single fiber sliver FB may be supplied to a drawing machine.
A funnel-shaped member 1 that compresses the fiber sliver FB is installed on the upstream side of the drawing machine, that is, on the upstream side in the transfer direction of the fiber material.
Also, it does not matter if other types of compression devices are used.
At this time, that is, after the fiber sliver FB is compressed by the funnel-shaped member 1, the fiber sliver FB ′ composed of the compressed individual fiber sliver FB is a sensor unit 2, 3 comprising a pair of sensor rollers as sensor means. It is designed to be supplied to the draft system 4 after passing through.
The draft system 4 incorporates three draft members, that is, three pairs of rollers, and is designed so that the fiber sliver FB ′ is drafted (stretched) between the three pairs of rollers.
These three pairs of rollers are composed of a pair of upstream rollers (intake rollers) 5, a pair of central rollers 6, and a pair of downstream rollers (exit rollers, delivery rollers) 7. The rotational speed of these rollers is as follows: It is set to increase in the order described above.
As a result, the fiber sliver FB ′ is designed to be drafted according to the degree of the rotational speed of the roller described above.
The main draft region constituted by the pair of central rollers 6 and the pair of downstream rollers 7 is provided with a tension bar 8 that changes the direction of the fiber sliver FB ′. The fiber sliver FB ′ (that is, the floating fiber) that is not sandwiched between the downstream rollers 7 is designed to be improved.
The drafted fiber sliver FB ′ is transferred into a plurality of sliver guide members with the aid of the upper deflection roller 9 (see FIG. 4), and passes through the pair of calender rollers 14 to curve the sliver path of the storage means. Designed to be transferred into member 16.
In the pair of calendar rollers 14, one of the pair of calendar rollers 14 is biased by a spring 15 in order to measure the cross-sectional area of the fiber sliver FB ′.
The fiber sliver FB ′ is designed to be transferred into the can 18 at a speed VL after passing through the sliver passage member 16 provided on the turntable 17 of the storage means that rotates at the angular speed ω.

As shown in FIG. 1, signals transmitted from the sensor units 2 and 3 are used for the purpose of compensating for a change in the mass of the fiber sliver FB ′.
The fiber sliver FB ′ passes between the sensor units 2 and 3 constituted by the fixed sensor disk 2 and the movable sensor disk 3, and at this time, the sensor disk pressed against the sensor disk 2. 3 is determined to be a measured value of the cross-sectional area of the fiber sliver FB ′.
The sensor disk 3 is connected to, for example, an inductive sensor member 20 of sensor means.
When the output signal (voltage signal) from the inductive sensor member 20 is transmitted to the data store 21, the distance difference between the passage between the sensor units 2 and 3 and the entry into the draft system 4, or temporal Designed to allow for differences (FIFO memory = first in first out buffer).
After the elapse of the time difference, the output signal, that is, the output signal from the data storage unit 21 is designed to be transmitted to the processing unit 22 having an evaluation function and an adjustment function.
The compensation for the mass change of the fiber sliver FB ′ in the main draft region is designed to be performed by changing the rotation speed of the servo drive unit 23 that causes the control rotation of the planetary gear mechanism 24.
The lower rollers of the pair of upstream rollers 5 and the pair of central rollers 6 are designed to be driven at a speed controlled by a planetary gear mechanism 24 driven by a motor 25 as a main motor. Yes.
Of the pair of downstream rollers 7 driven by the motor 25, the speed of the lower roller located on the lower side is kept constant, so that the length of the manufactured fiber sliver FB 'can be accurately calculated. It is.
The motor 25 is designed to drive the pair of calendar rollers 14, the rotary table 17, and the can table 19 together.

A spinning preparation machine according to an embodiment of the present invention is designed as a drawing machine 1 as shown in FIG.
The same reference numerals as those in FIG. 1 are used for the same constituent members.
Similar to the known drawing machine shown in FIG. 1, this drawing machine includes an adjustment mechanism on the upstream side.
In this embodiment, the motor 25 does not drive the pair of downstream rollers (exit rollers) 7 and the pair of calendar rollers 14 at a constant speed during normal operation, and is stored on the downstream side of these rollers. The components of the means, in particular, the turntable 17 are also designed to drive only the planetary gear mechanism 24 without being driven at a constant speed.
Another motor 26 that drives only the pair of downstream rollers 7 and the pair of calendar rollers 14 is provided.
Further, the turntable 17 as the storage means is driven at a constant speed by another motor 27 together with the sliver passage member (band channel member) 16 as the storage means installed in a fixed state with respect to the turntable 17. Similarly, the can stand 19 is designed to be driven by a motor 27 at a constant speed.
Further, the rotating table 17 and the cans table 19 may be connected to the motor 25.
In that case, the motor 27 is unnecessary.
The processing unit 22 is designed to send relevant control signals to the motors 25, 26, 27.
As a result, the pair of downstream rollers 7 and the pair of calendar rollers 14 are designed to compensate for high-frequency sliver defects under highly dynamic control (see FIG. 3).

FIG. 3 is a diagram illustrating a failure signal of the fiber sliver FB ′.
Actually, many different waveforms overlap in the failure signal of the fiber sliver FB ′.
In this embodiment, a basic low frequency (long wavelength) L1 exists, and a high frequency (short wavelength) L2 overlaps the basic low frequency (long wavelength) L1.
In the short-term adjustment by the pair of downstream rollers 7 and the pair of calender rollers 14 used in the present invention, it is designed so that only a high frequency (short wavelength) having a wavelength of L2 among defective signals of the fiber sliver FB ′ is handled. ing.
For this reason, the low frequency (long wavelength) L1 is designed to be removed by appropriate filtering (high-frequency filtering).
This low frequency (long wavelength) L1 is handled by a separate process. In this embodiment, as such a separate process, for example, a known upstream adjustment mechanism (upstream control mechanism) as shown in FIG. Is adopted.
In the present embodiment, the motor 27 is designed to drive the rotary table 17 and the can table 19 at a constant speed.

FIG. 4 is an enlarged view showing the draft system 4 provided with storage means.
The arrangement of the constituent members in FIG. 4 is the same as the arrangement in FIG. 2, and the illustration of components other than the driven constituent members is omitted.
In FIG. 4, components that are driven at a synchronized speed are represented by the same oblique lines.
The pair of upstream rollers 5 and the pair of central rollers 6 are driven so as to operate with a small speed change in order to compensate for the low frequency change in the mass of the fiber sliver FB ′ (the motor 25, FIG. 2). The servo drive unit 23 and the planetary gear mechanism 24), and the pair of downstream rollers 7 and the pair of calendar rollers 14 are highly dynamic to compensate for high frequency changes in the mass of the fiber sliver FB '. Driven by a simple control, that is, driven with a large speed change, and the turntable 17 is designed to move at a constant speed.
The fiber sliver FB ′ is designed to be drafted in the main draft region for both low and high frequency changes in the mass of the fiber sliver FB ′.
For this purpose, the control unit 22 with an evaluation function is designed to distribute the frequency appropriately and to transmit signals to the servo drive 23 and the motor 26 (FIG. 3).
The pair of upstream rollers 5 and the pair of central rollers 6, and the pair of downstream rollers 7 and the pair of calendar rollers 14 have a constant average rotation speed, and the size, that is, the rotation speed is It is set according to the degree of draft setting.
The average rotational speed of the pair of downstream rollers 7 and the pair of calendar rollers 14 corresponds to a constant rotational speed of the turntable 17 at the place where the fiber sliver FB ′ appears.

Here, when the plus change of the high frequency (short wavelength) L2 (see FIG. 3) among the defective signals of the fiber sliver FB ′ is compensated by increasing the draft (draft transfer amount), the calendar roller 14 and the cans The mass of the fiber sliver FB ′ located between the top of the fiber sliver FB ′ stacked in 18 and the place where the fiber sliver FB ′ is placed increases for a short period of time.
On the other hand, when the minus change of the high frequency (short wavelength) is compensated among the defective signals of the fiber sliver FB ′, the mass of the fiber sliver FB ′ in the above-described area is reduced only for a short period.

The effect of increasing or decreasing the mass of the fiber sliver FB ′ between the calendar roller 14 and the cans 18 for a short period is shown in FIGS.
As shown in FIG. 5, after compensating for one or more high frequency (short wavelength) thick segments, there will be more material in the sliver passage member 16, so that the fiber sliver FB ' The sliver passage member 16 is designed to pass through a long path as compared with the case of moving along the central axis of the sliver passage member 16.
FIG. 6 shows that the fiber sliver FB ′ is less slack in the sliver passage member 16 as a result of the adjustment mechanism on the downstream side of the present invention compensating for one or more thin segments.
The path through which the fiber sliver FB ′ passes through the sliver passage member 16 is short. As a result, the fiber sliver FB ′ is not strongly pulled or drafted.

In other words, the fiber sliver FB ′ passes through a long path or a short path in the sliver path member 16 at irregularly short intervals according to a change in rotational speed between the pair of downstream rollers 6 and the pair of calendar rollers 14. As a result, the change in the mass in the sliver passage member 16 is compensated.
The sliver passage member 16 is designed to exhibit a buffer function that averages the mass of the fiber sliver FB ′.
The mass of the fiber sliver FB ′ can be buffered by continuously changing the state shown in FIG. 5 and the state shown in FIG.

Compensation according to the invention provides that when the amplitude of mass change is less than 10% of the specified mass of the fiber sliver FB ′ and when the frequency of change is less than 10 Hz, ie when the change wavelength L2 is correspondingly short. In particular, it has been found that the integrity of the fiber sliver FB ′ is improved.
Otherwise, that is, if the sliver passage member 16 is not designed as described above, the distance between the calender roller 14 and the accumulation point of the fiber sliver FB 'in the can 18 and the design of the sliver passage member 16 Depending on the above, there is a possibility that the storage capacity of the mass of the fiber sliver FB ′ may be exceeded or a draft defect may occur.
In this embodiment, the adjustment mechanism on the upstream side provides uniformity on the one hand, but on the other hand, after passing through the draft system 4, the drafted sliver failure will again exist.

The movement of the fiber sliver FB ′ by the adjustment on the downstream side described above has an effect that the path of the fiber sliver FB ′ in the sliver passage member 16 is continuously changed, and as a secondary effect, the sliver passage FB ′ Accumulation of accumulation in the member 16 can be prevented.
In the case where there is no such effect, there is a possibility that deposits are accumulated in the sliver passage member 16 when the transfer speed (the transfer speed of the fiber sliver FB ′) is constant. The fiber sliver FB ′ does not pass through the location.
Therefore, as a secondary effect of the present invention, the fibers can be accumulated without depositing the fiber mass, that is, the fiber sliver FB ′ can be smoothly transferred and accumulated in the can 18.
In addition, the risk in this case is that after the inside of the can 18 is full, the fiber lump as described above slides out from the empty sliver passage member 16 into the full can 18. Is not a favorable situation.

The present invention has been described in detail using an embodiment in which the rotational speed of the turntable 17 (and hence the sliver passage member 16) and the can table 19 is constant.
However, in order to increase the mass storage capacity of the sliver passage member 16, the rotational speeds of the turntable 17 and the canister 19 are corrected to a slow reaction, that is, the rotation speed of the turntable 17 and the canister 19 is slowly increased. It may be changed to the extent of the
For this purpose, the control unit 22 is designed to be able to send an appropriate command signal to the motor 27.

In another embodiment, the present invention is provided only with the adjustment mechanism on the downstream side, and is not provided with the adjustment mechanism on the upstream side.
In this case, in the draft system 4 according to FIG. 4, the pair of upstream rollers 5, the pair of central rollers 6, the rotating table 17, and the cannula table 19 are driven at a constant speed, and the pair of downstream rollers 7 and the pair of calendar rollers 14. Is subjected to variable control of the rotational speed.

In yet another embodiment, two passing functions are realized by preceding a draft system having an adjustment mechanism on the downstream side with another draft system having an adjustment mechanism on the upstream side.
These two passing functions may be reversed in order.

In the present invention, it is possible to adopt a can 18 having a rectangular cross section.
In this case, the can 18 is designed not to be placed on the rotating can table 19 but to move linearly below the rotating turn table 17.

  As an effect of the present invention described above, it is particularly possible to compensate for a change in mass at a high frequency (short wavelength) (the term “mass” as used herein also means a change in thickness and / or density). Also, the sliver passage member exerts a buffer function that averages the mass of the fiber sliver, and it is possible to superimpose compensation on a conventional upstream adjustment mechanism, and two passes It can be used for the function, can realize the accumulation of fiber sliver without accumulating the fiber lump, and can be generally applied in a carding machine and a carding machine.

2 ... Sensor means (sensor unit, sensor disk)
3 ... Sensor means (sensor unit, sensor disk)
4 ... Draft system 5 ... Upstream roller (inlet roller, intake roller)
6 ... Central roller 7 ... Downstream roller (exit roller, delivery roller)
8 ・ ・ ・ Tension bar 9 ・ ・ ・ Upper deflection roller 14 ・ ・ ・ Calendar roller 15 ・ ・ ・ Spring 16 ・ ・ ・ Storage means (sliver passage member)
17 ・ ・ ・ Storage means (rotary table)
18 ... Kens 19 ... Kens stand 20 ... Sensor means (inductive sensor member)
DESCRIPTION OF SYMBOLS 21 ... Data storage part 22 ... Processing unit 23 ... Servo drive part 24 ... Planetary gear mechanism 25, 26, 27 ... Motor FB ... Fiber material (fiber sliver)
FB '... Fiber material (fiber sliver)
L1 ... Low frequency (long wavelength)
L2 ... High frequency (short wavelength)

Claims (9)

A draft system (4) having a pair of upstream rollers (5) and a pair of downstream rollers (7), and the mass, thickness or density of the fiber material (FB) installed on the upstream side of the draft system (4) Sensor means (2, 3, 20) for measuring changes, and sensor means (2, 3, 20) as a reference for controlling the pair of downstream rollers (7) connected to the sensor means (2, 3, 20) A processing unit (22) for adjusting the rotational speed of the roller by using the signal of, and adjusting on the downstream side, and a fiber material after being drafted from the draft system (4) installed on the downstream side of the draft system (4) A calendar roller (14) for pulling out (FB ′) and transferring it forward; and a storage means (16, 17) having a turntable (17) for transferring the fiber material (FB ′) into the can (18); With In the spinning preparation machine,
The pair of downstream rollers (7) and the pair of calendar rollers (14) are driven with at least a temporary speed change in the rotational speed under the control of the processing unit (22),
The storage means (16, 17) is driven with a speed change smaller than the speed change of the pair of downstream rollers (7) and the pair of calendar rollers (14), or is driven at a constant rotational speed. Spinning preparation machine characterized by being designed to   The processing unit (22) drives the storage means (16, 17) at a constant rotational speed during normal operation and causes the pair of downstream rollers (7) and the pair of calendar rollers (14) to move more than during normal operation. 2. Spinning preparation machine according to claim 1, which is designed to be driven at a slow and / or higher rotational speed.   The processing unit (22) controls the pair of downstream rollers (7) and the pair of calendar rollers (14) to compensate for a change in the mass of the fiber material (FB ′) that is less than 20% of the specified mass. The spinning preparation machine according to claim 1 or 2, characterized in that the spinning preparation machine is designed to do so.   The processing unit (22) is designed to control the pair of downstream rollers (7) and the pair of calendar rollers (14) to compensate for changes in the fiber material (FB ′) having a frequency of 5 Hz or more. The spinning preparation machine according to any one of claims 1 to 3, wherein the spinning preparation machine is provided. A pair of central rollers (6) are installed between the pair of upstream rollers (5) and the pair of downstream rollers (7),
The pair of upstream rollers (5) and the pair of central rollers (6) are designed to be driven at a constant speed during normal operation. Spinning preparation machine. A pair of central rollers (6) are installed between the pair of upstream rollers (5) and the pair of downstream rollers (7),
An upstream adjustment mechanism having a control function for the pair of upstream rollers (5) and the pair of central rollers (6) is provided in addition to the adjustment mechanism on the downstream side of the fiber material (FB ′) that compensates for changes in high frequency. 5. The spinning preparation machine according to claim 1, wherein the spinning preparation machine is designed to compensate for a change in low frequency. The low frequency is compensated by a change in rotational speed of the pair of central rollers (6) according to a hyperbolic function;
The spinning preparation machine according to claim 6, characterized in that the high frequency is designed to be compensated by a linear change in rotational speed of the pair of downstream rollers (7) and the pair of calendar rollers (14).   8. Spinning according to claim 6 or 7, characterized in that the processing unit (22) is designed to process in consideration of phase displacement information of a defective signal of the fiber material (FB '). Preparation machine. The drawing machine comprising: a drawing machine having only an adjustment mechanism on the downstream side; and another drawing machine having an adjustment mechanism on at least the upstream side following or preceding the drawing machine. The spinning preparation machine according to any one of claims 6 to 8.