JPS62117834A - Fine spinning machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spinning machine according to the preamble of claim 1.

Such spinning machines each produce a yarn consisting of two slivers, which run to a doubling point, from where they are doubled together and twisted into a single yarn. These slivers consist of any non-endless fiber, especially combed wool. The twisting of the yarn is produced by conventional means, in particular by a spindle passing coaxially through the spinning ring, over which the traveler carried by the yarn rotates. However, it is also possible to provide other devices for forming the twist and for winding the yarn, such as rotating spindle pots, flyer spindles or similar devices.

Each of the working positions of the spinning machine that spins yarn is called a spinning position.

In a known spinning machine of this type (see DE 30 21 614), a rotatable arm located above the dowel point is provided at each spinning position as a sensing element. The installed system outage monitoring device belongs to this system. When the sliver breaks, this arm tilts downwards, and the tightening that is firmly connected to this arm and tightens the thread causes a follow-up thread breakage by the member. The occurrence of this follow-up yarn breakage is desirable since the running of the remaining sliver along the spinning position is generally not interrupted by a break in only one of the two slivers. In this case, a thinner yarn with the same partial components but half the thickness is spun. These irregularities easily lead to yarn breakage when the yarn is later subjected to secondary processing, resulting in defective products. Although this known yarn breakage monitoring device has the advantage that it requires only one mechanical sensing device, however, this machine formed by an arm Since a sensing device is placed on the doubling point, this yarn breakage sensing device acts on this doubling point and the yarn itself, for example to move the yarn downward, especially if the yarn is thin. Risk of thread breakage.

Similarly, only one thread breakage sensing device is provided,
This thread breakage sensing device detects the -
A spinning machine of the above-mentioned type is also configured to sense one characteristic that changes significantly when the yarn is spun from only one of the slivers at intervals in front of the joining point of both slivers. It is publicly known. By this property of the yarn is meant its volumetrically measurable mass/length or its optically measurable thickness.

However, this presupposes that the yarn has good uniformity, which limits the applicability of this measurement method.

There is also the risk that fiber particles deposited on the measuring device may lead to incorrect measurements.

It is likewise a problem of the invention that only one yarn breakage sensing device is required per each spinning station, but that this yarn breakage sensing device increases the risk of sliver or yarn breakage occurring. The object of the present invention is to create a spinning machine of the type described at the outset, which allows the spinning of arbitrary, but also highly non-uniform, yarns without any disadvantages.

This problem is solved according to the invention by a spinning machine according to claim 1. A second solution of this problem according to the invention is set out in claim 2.

In the present invention, the yarn breakage sensing device does not need to react sensitively to changing properties of the yarn, but rather to the presence or absence of the yarn or the corresponding sliver on its normal running path, or to an irregularity. The thread can therefore be of any nature, in particular highly inhomogeneous, or of any fibers, for example natural fibers (e.g. wool) and/or synthetic fibers and/or other fibers, but of regular length. It may also be a yarn consisting of long or shorter fibers and/or short fibers, such as cotton fibers or similar short fibers. Therefore, this sensing device is insensitive or only slightly sensitive to textile flying objects, and the yarn breakage sensing device must be protected from accumulating enough flying objects to become a nuisance to it. It is possible to easily configure the structure in such a way that the fiber particles adhering thereto, and possibly only in small quantities, can be easily removed and cleaned, for example with a conventional moving blower.

This yarn breakage sensing device works in particular in a non-contact manner, but in the spinning machine according to claim 1 it is possible to mechanically detect the presence or absence of yarn or sliver on the normal yarn running path at the time, or detect irregularities. It is also possible to scan with a sensing member. This is because this sensing element does not lie above the joining point of the two slivers, but rather the yarn or sliver only has to touch it weakly laterally at a distance from this joining point, so that the two This is because the sensing member similarly does not increase the risk of yarn breakage.

In the spinning machine according to claim 2, the sensing region of the sensing member extends in the direction of the draft mechanism so as to cover the normal position of the yarn doubling point. As a result, this sensing element simultaneously monitors not only the normal running path of the yarn, but also the normal running path of both slivers. The work on the sensing element is thereby further reduced and carried out with particular reliability. Accordingly, according to claim 2, the joining points of both slivers and yarns and these parts are normally or always present in the sensing area of the sensing member to which they belong, and therefore, normally or always within the sensing area of this sensing member. There will always be a particularly large amount of fiber material present. In this case, even if the yarn and/or one sliver occasionally protrudes from the sensing area of the sensing element due to a significant deviation of the yarn joining point, the fibrous material of the yarn still in its normal running path or at least A single sliver of fibrous material may be present within the sensing area of the sensing member. This facilitates the sensing of textile materials that are still in normal motion. This also makes it possible to reduce the sensitivity of the sensing element.

Advantageously, the sensing element is an opto-electric, in particular opto-electronic, sensing element, in particular an optical laser. Advantageously, the sensing element is also provided with at least one optical system. However, other sensing members may also be used that work in a contactless manner, such as in particular capacitive sensing members or similar sensing members.

A sensing element that operates in a contactless manner can be constructed without problems in a particularly simple manner so that it does not collect fiber particles and can be easily cleaned, especially by wiping with a moving blower.

With an advantageous design, the optoelectronic sensing element can be formed as a light barrier, whether as a projection light barrier, a reflective light barrier or a conventional light barrier.

In the case of a projection type light barrier, the light projector and the light receiver are provided facing each other, whereas in the case of a reflective light barrier, the light projector and the light receiver are provided in parallel, and there is They are oriented toward reflectors that are spaced apart from each other.

It is also possible to configure the optoelectronic sensing element in other ways, in particular as a reflective scanning element. When designed as a reflective scanning element, this reflective scanning element likewise has a light projector and a light receiver.

The opto-electro-sensing member is constructed such that it need not have mechanically moving parts and is structurally simple, inexpensive, and highly actuated. can do.

Either because a relatively long time often elapses before the yarn breaks are removed, or because the removal of the yarn breaks often takes place only after the drawing has ended, and therefore they run out of the draft mechanism of the relevant spinning position in rapid succession. Because the sliver is no longer twisted into threads during this time,
It is advantageous to provide such that breaking of the sliver is not followed by breaking of the thread, and that the continuous supply of sliver from the drafting mechanism, in particular at the relevant spinning position, is interrupted. This is a thread cutting device and/or for performing thread tightening, cutting, tearing or similar actions.
Alternatively, this can be achieved by arranging the roving stop device to be controlled by a yarn breakage signal.

This yarn cutting device serves to cut the yarn still present at the corresponding spinning position even after a yarn breakage occurs in one of the two slivers.

This cutting can be effected, for example, mechanically by a cutting device, or electrically by an incandescent wire or by any other suitable method, for example - the system is tightened so that the thread is no longer fed to the winding device and a thread breakage occurs. Since there is no need to do this, it is done by tightening one system. The roving stop device prevents the continuation of the running of both slivers (rovings) which are fed into the draft mechanism of the relevant spinning station in a suitable manner, for example by tightening the threads, by opening and closing the draft mechanism or by similar means. Stop by action.

The invention will now be described in detail with reference to the embodiments illustrated in the accompanying drawings.

Spinning position 10 of a ring spinning machine illustrated in cross-section in FIG.
are two slivers 17 running parallel to each other with a distance between them.
．． It has a draft mechanism 11 equipped with a large number of rollers for drafting 17". This draft mechanism 1
1, only the delivery roller pair 14 is illustrated here.

The bottom roller 15 of this pair of delivery rollers 14 is formed by a bottom roller extending in the manner customary for spinning machines over almost the entire length of the relevant machine side of the spinning machine, on which each spinning At this position, the top roller 16 is pressed. The slivers 17.17'' from both cars passing through this draft mechanism are guided by a sliver guiding device (not shown) at a distance from each other on the sides, and after leaving the pair of delivery rollers 14 pass through the projection type light barrier (FIG. 2). The slivers 22, 22'', which run untwisted from the pair of delivery rollers 14, are alternately twisted from the doubling point 19, which is located directly above the photoelectric sensing member 21 to be formed. The thread 23 is formed into a single thread 23. This thread 23 has both slivers 22
．． 22', if present, passes through a sensing element 21 fixedly arranged at a distance below the joining point 19 in the existing normal running path and is immediately followed by, for example, two knives. A cutting device 24 is reached, which may be designed as a cutting device. This cutting device 24 is electrically activated and cuts the thread 23 each time it is activated. This operation is started by the sensing member 21 when the sensing member 21 senses yarn breakage.

As long as the thread cutting device 24 is not activated, the thread 23 passes through the thread cutting device without being cut by the thread cutting device. The thread 23 then runs through a thread guide 25 spaced above the spindle and from this thread guide to a spindle 26 which rotates while forming a balloon. On this spindle is a tube 27
is removably inserted and thread 23 is wound around this tube to form a spool 29. Slent Guide 25
On the way from the thread to the spindle 26, the thread 23 passes through the traveler 30.
pass through.

This traveler is rotated by a thread on a spinning ring 31 through which a spindle 26 coaxially passes. This spinning ring 31 is located next to a ring rail 32, which has an upward movement for winding the thread 23 on the tube 27 onto the bobbin body 29.

When one of the two slivers 22, 22" breaks, the other sliver undergoes a lateral movement, which causes the light barrier 21
It leaves the beam of light and reaches the thread 23, where it is twisted into a thread by itself. This sliver, which remains in each case, is designated in the drawing by reference numerals 22a and 22a° and forms threads of correspondingly reduced thickness.

In the embodiment of the optoelectronic sensing element 21, which is designed as a light barrier, as shown in FIG. It is provided on both legs. The light projector 42 and the light receiver 44 are arranged in a frame 4 forming a common casing for them.
1 is provided in a corresponding hole 42 in 1. Light projector 4
2 and the photoreceptor 44, with their lenses, only slightly protrude the frame 41, which has a smooth outer periphery. Therefore, the frame has a smooth outer periphery on all sides including the light projector 42 and light receiver 44 provided therein, and therefore this frame is free from mooring positions where flying fibers can get stuck. First, the sensing member 21 as a whole becomes insensitive to dirt and does not particularly show a tendency to retain flying fibers. Also, because of its smooth surface, it can be easily cleaned, either mechanically or by blowing with a common moving blower found in spinning machines and known for its pneumatic cleaning.

A photoreceptor 4 comprising, for example, a photodiode and an optical system.
4 receives a light beam emitted from a light projector 42 including an incandescent lamp, a light emitting diode, etc. and an optical system as a straight optical path, and converts this light beam into a corresponding electrical signal. As long as the light beam is blocked by the thread 23, the output electrical signal amplified in the amplifier 43 of the photoreceptor is below the threshold of the detector 33 connected after the amplifier 43. Therefore, this threshold - the detector will not emit an output electrical signal;
Cutting device 24 is not activated. However, if the remaining slivers, e.g. The beam energy increases and this generates, as will be explained in more detail below, a line-cutting electrical signal which activates the cutting device 24 for cutting the sliver 22a or 22a° present as a thread and optionally This notifies a worker or an automatic system splicing vehicle of a thread breakage and provides a signal to eliminate the thread breakage.

The light barrier 21 can also be designed as a reflective light barrier. That is, the light beam emitted from the light projector 42 is reflected by the reflector into the area of the frame 41 that is located opposite the reflector, and is received by the light receiver provided beside the frame.

The intensity of the received light beam is determined by whether the thread 23 is a sliver 22 or not.
．． 22" breaks and comes off the optical path,
increase accordingly.

The threshold value of the detector 33 is adjustable by means of a common threshold selector 34 which belongs to all spinning positions of the machine or of the working longitudinal side of the machine, so that the threshold value of the detector 33
Each threshold value can be adjusted depending on the thickness or count of the yarn to be spun each time. Figure 1 also shows some other thresholds.
Although detectors 33 are shown, these threshold detectors belong to other spinning positions of the spinning machine.

A spinning machine, for example, has several hundred spinning stations.

The threshold detector 33 outputs an output signal only if the output signal amplified in the amplifier 43 of the photoreceptor 44 associated with this threshold detector exceeds the threshold indicated by this threshold detector. On the other hand, when the output signal of the amplifier 43 falls below the adjusted threshold value, the output signal is not generated. In this case, below the threshold, the thread 23
Advantageously, it is signaled only when it continues without interruption for a predetermined short duration selected such that accidental excursions and oscillations can no longer induce an overshoot. . This duration is likewise adjusted by the threshold selector 34. The output signal of the threshold detector 33 forms a yarn breakage signal for the spinning position in question, is converted and amplified in an amplification and pulse shaping stage 36, and is then sent to the yarn cutting device 24 for starting the cutting process. Given. The yarn 22a° or 22a that is still present is therefore cut by the yarn cutting device 24, and the yarn spinning is interrupted accordingly.

Instead of forming the sensing element 21 as a light barrier, it is often advantageous to form this sensing element in another way, for example as a reflective scanning body, as shown in one embodiment in FIG. In this case, the photoelectrically sensitive sensing element 21 comprises a light projector 42 and a light receiver 44 . These are arranged laterally in parallel on the legs of the angle carrier 41°, which is immovably fixed to the frame of the spinning frame, as follows. That is, the thread 23 is sensed by the light receptor 44 whenever the thread is within the beam of light of the light receptor 42 to such an extent that the light receptor 44 responds to the light reflected from the thread by the light projector to this light receptor. It is provided. In this case, the amplifier 43
has a pulse shaping stage and a negation field connected behind it. That is, whenever the sliver 22 or 22'' is broken and the thread formed by the remaining sliver 22a'' or 22a leaves the active area of the reflective scanning body 21, the threshold detector 23 is broken. Provision is made to generate a thread break signal for actuating device 24.

The photoelectric sensing member detects the normal running path of the thread 23,
That is, when both slivers 22 and 22'' are present, doubling point 1
Instead of configuring it to scan in a contactless manner at intervals in front of the sliver 22 or 22'', this opto-electric sensing member is arranged so that it scans one normal path of both slivers 22 or 22''. It is also possible to provide scanning in response to the lack of
It is schematically illustrated in the figure. In this embodiment sensing member 1
2 scans the normal running path of the sliver at intervals above the doubling point 19. However, in this case a mechanical sensing element 21 is provided instead of the optoelectronic sensing element.

However, instead of this mechanical sensing element 21, it is of course possible to use an opto-electrical sensing element, in particular a light barrier or a reflective scanning body or a sliver 22 which is illuminated, for example, only by the normal light of the interior lighting of the machine hall. It may also be an opto-electric sensing element, ie without a light projector in this case. Alternatively, it is also possible to provide other suitable sensing elements, ie sensing elements which sense whether the sliver 22 scanned by this sensing element is not present on its normal travel path. If this sliver 22 is not on its normal running path, a thread breakage signal is generated. Moreover, in this embodiment, the mechanical sensing member 21 is replaced by an electrical switch mechanism 55, in particular a contact switch mechanism, i.e. a switch which functions to generate a signal each time the sensing member 21 comes into contact with this contact switching mechanism. Yarn breakage monitoring is accomplished by actuating the mechanism and, in this embodiment, provides a direct yarn breakage electrical signal to the cutting device 24.

The cutting device is then excited by this signal and cuts the respective remaining thread 22a or 22a°.

In this embodiment, the sensing member 21 is provided with an arm 57 rotatably supported on a carrier 56 fixed to a frame (not shown) of the spinning machine. A sensing member 21 is formed. This arm is elastically loaded in the direction of arrow A by a spring 58 and receives the sliver 22 at a distance above the dowel point 19 in a fork-like body 59 provided at its free end. The spring 58 has a very weak force, such that the arm 57 bears against the sliver 22 with very little force and thus does not interfere with the running of this sliver. However, if the sliver 22 or thread 23 breaks, this arm 5
7 is pushed by the spring 58 to the position shown by the dashed line in FIG. 5 until it comes into contact with the contact switch mechanism 55;
This switch mechanism 55 then transmits a thread breakage signal, in which a thread breakage is signaled, in order to activate the cutting device 24 for cutting the remaining sliver 22a' and, if necessary, to the operator or the splicing wheel. It is also generated to activate a warning device to call someone nearby. On the other hand, when the sliver 22 and the thread 23 do not break and the sliver 22' breaks, the running path of the sliver 22 changes from its normal path to the running path belonging to the remaining sliver 22a that still exists. Move to the road. This residual sliver 22a forming the thread therefore likewise induces a pivoting of the sensing member 21 into the position indicated by the dash-dotted line in FIG. Similarly, the operation of the cutting device 24 for cutting the remaining sliver 22a is started.

Optionally, the mechanical sensing element 21 can also be used in place of the opto-electric sensing element 21 in FIG. 1, or the opto-electric sensing element 21 can also be used in the embodiment according to FIGS. can be used as an alternative to the mechanical sensing element 21 and its associated electrical switch mechanism.

The spinning station 10 of a ring spinning frame, which is illustrated in cross section in FIG. 6, differs from the spinning station illustrated in FIG. 1 essentially in the following respects. 6, the sensing element 21, which is also advantageously an opto-electric sensing element, operates in a contactless manner. In FIG. In addition to monitoring for the presence of yarn 23 there, the sensing area of this sensing element 21 also detects the draft mechanism 1 over the normal travel path of the yarn joining point 19.
It extends in one direction and is therefore provided in such a way that this sensing element also additionally monitors the normal running path of the two slivers 22, 22' at the joining point 19. Both slivers 22
．． 22", this means that the joining point 19 is always or normally connected to the projection light barrier (7th point) in this embodiment.
It lies within the sensing area of the opto-electrical sensing member 21 forming the photoelectric sensing element 21 (FIG.). Both the two slivers 22.22'' and the thread 23 therefore pass through the stationary sensing element 21 on their normal running path, which is formed when these two slivers 22.22'' are present, and subsequently - It passes through a single cutting device 24, which may be designed as a cutting device with two knives, for example.

If one of the two slivers 22, 22'' breaks, the other sliver undergoes a lateral movement, so that both it and the thread 23 reach a position out of the beam of the light barrier 21, where they are removed. - together form a slender thread corresponding to the residual sliver 22a or 22a°.

The seventh part of the photoelectric sensing member 21 as a light barrier in FIG.
In the embodiment shown in the figure, its light projector 42 and its light receiver 44, as in the embodiment according to FIG. It is set in. Therefore, the explanations corresponding to those given with respect to the embodiment of FIG. 2 apply to this embodiment.

A photoreceptor 44, which may include, for example, a photodiode and an optical system, receives in a straight light path the light rays emitted by a light projector 42, which may include an incandescent lamp, a light emitting diode, or similar elements and an optical system; into the corresponding electrical signal. This light beam is applied to the thread and/or sliver
or 22", the electrical output signal amplified by the amplifier 43 of the photoreceptor 44 is below the threshold of the threshold-detector 33 connected after this amplifier 43, and therefore this The threshold value detector does not give an output signal and the cutting device 24 is not activated. However, if the sliver 22 or 22° breaks, the remaining sliver 22a or 22a" and thus the thread formed only from this sliver The light energy that leaves the optical path of the light barrier 21 and is received by the photoreceptor 44 increases, thereby generating an electrical thread breakage signal, which is transmitted to the sliver 22a or 22 present as a thread.
The cutting device 24 for cutting a' is activated, or if the case requires a signal to notify an operator or automatic splicer of the yarn breakage in order to eliminate the yarn breakage. A break in the thread 23 also generates a break signal.

It is also possible to form the light barrier 21 as a reflective light barrier. That is, the light projected from the light projector 42 is reflected by the reflector to the region of the frame 41 facing the reflector, and is received by the light receiver provided beside the frame.

The intensity of the received light is determined by the fact that the thread 23 is in the sliver 22, 22'
If any of them is removed from the beam due to breakage, it will increase correspondingly. The use of sensing members that work in other non-contact manners is also possible. The explanations regarding the threshold value detector 33 and the cutting device 24 made with respect to the embodiment according to FIG. 1 also apply to this embodiment. That is, in this case as well, when the sliver 22 or 22° is broken, the remaining yarn is cut.

[Brief explanation of drawings]

FIG. 1 shows in a block diagram together the elements of the electronic equipment of a ring spinning machine for automatically interrupting the spinning of yarn when a photoelectric sensing element responds, but other details of the machine are not shown. FIG. 2 is a schematic plan view of the photoelectric sensing member at the spinning position according to FIG. 1; FIG. 3 is another embodiment of the sensing member according to FIG. 2. , FIG. 4 is a sectional view of another embodiment of the spinning position according to FIG. 1, and FIG. 5 is a cross-sectional view of another embodiment of the spinning position according to FIG. An enlarged partial cross-sectional view taken along line 5--5, FIG. 6 shows elements of the electronic equipment of a ring spinning frame for automatically interrupting yarn spinning when a photoelectric sensing element is activated. FIG. 7 is an enlarged schematic plan view of a photoelectric sensing member of the spinning machine according to FIG. 6; FIG. The symbols in the figure are: 19... Thread doubling point 21... Sensing member 22.22''... Sliver 23... Yarn

Claims (1)

[Scope of Claims] 1. At each spinning position, two slivers that run parallel to each other at a distance from the draft mechanism as untwisted slivers run toward the doubling point, and the doubling a break in any one of said slivers and at each spinning position running on a spindle or similar member which imparts twist to this sliver and twisting it into yarn alternately and at each spinning position; In spinning machines, in particular ring spinning machines, with a large number of spinning positions for spinning a yarn, in which a sensing element responsive to a yarn break is assigned, the sensing element (21) detects when both slivers (22 ;22'
) before the doubling point (19), or place the normal running path of the thread (23) before the doubling point (19).
19) is configured to monitor the presence or absence of the sliver or thread in front of the machine and generate a thread breakage signal when the monitored sliver or thread suddenly breaks during work on its normal traveling path and becomes missing. A spinning machine characterized by: 2. The spinning machine according to claim 1, wherein the sensing member (21) is a sensing member configured to perform sensing in a contactless manner. 3. A spinning frame according to claim 1 or 2, wherein the sensing element (21) is an opto-electric sensing element, in particular a light barrier. 4. Spinning machine according to claim 4, wherein the sensing element (21) is designed as a light barrier. 5. The sensing element is configured as a reflective scanning element;
A spinning frame according to claim 4. 6. The sensing member (21) is provided with a sliver (22) of the photoreceptor (44) of this sensing member, in particular of the opto-electrical sensing member (21).
;22') which responds by transmitting a thread breakage signal to a change in the output signal that occurs in immediate response to the breakage of the thread.
3) are provided in claims 1 to 5.
The spinning machine described in any one of the preceding paragraphs. 7. Threshold-detection device (33) breaks sliver (22)
configured to signal a rupture of the sliver (22a, 22a') only when the above or below threshold value induced by the sliver (22a, 22a') is displayed without interruption for a predetermined duration; A spinning machine according to claim 6. 8. According to one of the claims 1 to 7, the sensing element (21) is configured to control a yarn cutting device (24) and/or a roving stop device. spinning machine. 9. The spinning machine according to claim 1, wherein the sensing member (21) is a mechanical sensing member. 10. At each spinning position, two slivers in each case run out as untwisted slivers in parallel at a distance from the drafting mechanism, run in the direction of a piling point, and from this piling point the sliver is twisted. running on a spindle or similar member to give the slivers in such a way that they are alternately twisted into yarns and responsive to the breakage of any one of said slivers and the breakage of the yarns spun from these slivers at each spinning position. In spinning machines, in particular ring spinning machines, with a number of spinning positions for spinning yarn, of the type to which the sensing element belongs, the sensing element (21) detects the normal running path of the yarn (23). The sensing member (21) monitors the presence or absence of this yarn (23) in front of the yarn joining point (19) and senses it in a non-contact manner;
The draft mechanism (
11) The above-mentioned spinning machine is characterized in that it extends in the direction. 11. The spinning machine according to claim 10, wherein the sensing member (21) is a sensing member formed to perform sensing in a non-contact state. 12. The spinning machine according to claim 10 or 2, wherein the sensing element (21) is an opto-electric sensing element, in particular a light barrier. 13. Spinning machine according to claim 12, wherein the sensing element (21) is designed as a light barrier. 14. The spinning machine according to claim 12, wherein the sensing element is designed as a reflective scanning element. 15. The sensing member (21) is provided with a sliver (2) of the photoreceptor (44) of this sensing member, in particular of the opto-electrical sensing member (21).
a threshold-detecting device (
33), the spinning machine 16 according to any one of claims 10 to 14, in which the threshold value detection device (33) is provided with a broken sliver (22a, 22
a′) is arranged to signal a rupture of the sliver (22a, 22a′) only when the above or below threshold thereof induced by a′) is displayed without interruption for a predetermined duration. The spinning machine according to item 15. 17. According to any one of claims 10 to 16, the sensing element (21) is configured such that the thread cutting device (24) and/or the roving stop device is controlled. spinning machine. 18. The spinning machine according to claim 10, wherein the sensing member (21) is a mechanical sensing member.