A high-efficiency correction device and method under tension stability

Abstract

This invention discloses a high-efficiency web-correcting device and method under stable tension, belonging to the technical field of web-correcting devices. It includes: a frame, a tensioning mechanism, and a web-correcting mechanism; the frame has an input end and an output end; the tensioning mechanism is located near the input end; the tensioning mechanism includes a driving component and a tension roller connected to the output end of the driving component; the tension roller is oscillating under the drive of the driving component to control the product to always be in a tensioned state; the web-correcting mechanism is mounted on the frame; the web-correcting mechanism includes: a rotatable web-correcting component and a power component connected to the web-correcting component; the web-correcting component rotates in a predetermined direction under the drive of the power component, causing the product in the tensioned state to move to correct the product's orientation. This invention, by optimizing the tensioning structure and the web-correcting mechanism, achieves sufficient and uniform tension during the web-correcting process, ensuring that the product reaches a flat and deviation-free state before winding.

Description

Technical Field

[0001] This invention belongs to the field of web guiding device technology, specifically relating to a high-efficiency web guiding device and method under stable tension. Background Technology

[0002] In some products with harder materials and larger widths (such as...) PVC In the production of flooring, stainless steel strips, copper strips, rubber sheets, etc., especially before final winding, precise correction of the product is a key step to ensure product quality and appearance.

[0003] These products are made of harder materials and have a larger width (up to 2100). mm (or higher), deformation or unevenness is easily generated during the correction process. The tension generated by traditional correction devices, such as floating rollers, is difficult to match with the tension required by the product, and is often too large or too small; moreover, it is often difficult to generate sufficient tension to achieve the expected correction effect without damaging the product surface. Summary of the Invention

[0004] Purpose of the invention: In order to solve the above problems, the present invention provides a high-efficiency correction device and method under tension stability.

[0005] Technical solution: A high-efficiency correction device under stable tension, comprising:

[0006] A rack, on which input and output terminals are provided;

[0007] A tensioning mechanism is disposed near the input end; the tensioning mechanism includes a drive component and a tension roller connected to the output end of the drive component; the tension roller is configured to oscillate under the drive of the drive component to control the product to always be in a tensioned state;

[0008] A correction mechanism is mounted on a frame; the correction mechanism includes: a rotatable correction component, and a power component connected to the correction component;

[0009] During the correction process, the correction component rotates in a predetermined direction under the drive of the power component, causing the product, which is in a tensioned state, to move in order to correct the product's orientation.

[0010] In a further embodiment, the tensioning mechanism further includes:

[0011] At least two sets of bases are provided on the frame;

[0012] At least two sets of rotating components are symmetrically arranged; one end of each rotating component is rotatably connected to the base and the other end is connected to the end of the tension roller; the rotating component is connected to the output end of the drive component.

[0013] An electronic ruler, the same number as the driving component, is disposed on one side of the driving component.

[0014] In a further embodiment, the correction component includes:

[0015] A correction frame is disposed on the top of the frame; the bottom surface of the correction frame is connected to the output end of the power component;

[0016] At least two sets of correction components are disposed on the top surface of the correction frame; the correction components abut against the product;

[0017] At least four sets of sliding members are arranged in a circular array; one end of each sliding member is connected to the alignment frame and the other end is slidably connected to the frame.

[0018] A rotating support is provided between the alignment frame and the machine frame; the rotating support is configured to allow the alignment frame to rotate about its axis.

[0019] A photoelectric sensor is mounted on the frame near the output end; the photoelectric sensor is configured to detect whether the product is offset.

[0020] In a further embodiment, the slider includes: a heavy-duty portion, which is vertically arranged;

[0021] The upper and lower rolling parts are respectively located on the heavy-duty part.

[0022] In a further embodiment, the frame is provided with a connector; the connector is located between adjacent rolling portions and abuts against the rolling portions.

[0023] In a further embodiment, the drive element is configured as a cylinder.

[0024] In a further embodiment, the power component is configured as an electric cylinder.

[0025] In another technical solution, a highly efficient web correction method under stable tension is provided, based on the highly efficient web correction device under stable tension as described above. The method includes the following steps:

[0026] Based on the product being transported, set the required tension range value for the product;

[0027] The product is conveyed from the input end to the output end, and the actual tension value of the product passing through the tension roller is detected in real time.

[0028] The relationship between the actual tension value and the required tension range value is compared to obtain the comparison result; based on the comparison result, the product is determined to be in the corresponding state, and the movement of the drive component is controlled based on the state.

[0029] Based on the movement of the driving component and the actual displacement value of the electronic ruler adjusted according to predetermined rules, the tension roller is controlled by the driving component to keep the product in a tensioned state at all times.

[0030] The product is monitored in real time using photoelectric sensors to determine if it has deviated. If so, the power unit is controlled to rotate the correction frame and the direction is corrected while the product is under tension. Otherwise, no correction is needed.

[0031] In a further embodiment, based on the comparison result, determining that the product is in a corresponding state, and controlling the movement of the driving component based on the state, includes the following steps:

[0032]

[0033] Among them, state Defined as a tensioned state, state Defined as an overtight state, state Defined as a relaxed state; for t The actual tension value experienced by the product at that moment;

[0034] The product is in a state of condition. If so, the original state of the driving component is maintained;

[0035] Or, the product is in a state of... Then, the drive components are controlled to retract and the product speed is reduced to keep the product in a certain state. ;

[0036] Or, the product is in a state of... Then the control actuator will open and increase the product speed to keep the product in a state. .

[0037] In a further embodiment, adjusting the actual displacement value of the electronic ruler based on the motion of the driving component and a predetermined rule includes the following steps:

[0038] The reservation rules are as follows:

[0039] K =( RH - TL ) / ( PIW . H - PIW . L ) ;

[0040] B = RH - K * PIW . H ;

[0041] X = K *Electronic ruler value+ B = K *Electronic ruler value+ RH - K * PIW . H ;

[0042] in, RH This is the value at the position of the electronic ruler when the drive component is fully open. PIW . H This refers to the analog signal received by the system when the drive components are fully open. TL This value represents the position of the electronic ruler when the drive component is fully retracted. PIW . L The analog quantity received by the system when the drive component is fully compressed; K The slope between the actual value and the measured value; X Value t The displacement value of the electronic ruler's position at that moment; B The displacement of the electronic scale when the drive component moves away from the fully open position; the electronic scale value is t The analog value corresponding to the position of the electronic ruler at that moment;

[0043] judge X and TL, RH The relationship between them leads to the following judgment:

[0044] like X < TL Then adjust the stroke length of the drive component to update. X The value is TL ;

[0045] or, X > RH Then adjust the stroke length of the drive component to update. X The value is RH ;

[0046] or, TL ≤ X ≤ RH, Then maintain the original state of the driving component. X The value remains unchanged.

[0047] Beneficial effects:

[0048] (1) The tensioning mechanism in this invention includes a driving component and a tension roller. The driving component drives the tension roller to swing, and the tension roller acts on the product to make the product have sufficient tension and control the product to always maintain a tensioned state. Moreover, the tensioning mechanism can be configured according to the tension required by different products to meet various needs.

[0049] (2) The correction mechanism in this invention includes a correction component and a power component. The power component drives the correction component to rotate, thereby moving the product under tension to correct the product's direction. It can effectively correct the product's direction for products with a large width and hard material, while ensuring that the product surface is not damaged.

[0050] (3) By optimizing the design of the tensioning structure and the correction mechanism, sufficient and uniform tension is generated during the correction process, thereby ensuring that the product reaches a flat and unbiased state before winding. Attached Figure Description

[0051] Figure 1 It is a structural schematic diagram of the present invention;

[0052] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0053] Figure 3 This is a schematic diagram of the correction mechanism;

[0054] Figure 4 yes Figure 3 middle A Enlarged view of the structure.

[0055] Figures 1 to 4 The components are labeled as follows: frame 10, input end 11, output end 12, connector 13, tensioning mechanism 20, drive component 21, tension roller 22, base 23, rotating component 24, electronic ruler 25, correction mechanism 30, correction assembly 31, correction frame 311, correction component 312, sliding component 313, heavy load part 3131, rolling part 3132, rotating support 314, photoelectric sensor 315, power component 32, product 40. Detailed Implementation

[0056] Example 1

[0057] As 1 to Figure 4 As shown, this embodiment provides a high-efficiency web-correcting device under stable tension (hereinafter referred to as "this device"). This device is applied to continuous production lines for roll materials with high production speeds, rigid products, thick products, or wide products, to effectively correct web deviation. This device is suitable for many types of products, such as metal strips (stainless steel strips, copper strips, aluminum strips), and plastic sheets (…). PVC Hardboard, PP Sheets, rubber sheets, composite materials (carbon fiber sheets, glass fiber sheets), etc.

[0058] This embodiment uses PVC Let's take the floor as an example to explain in detail. PVC Before the flooring is rolled up at the final stage, the product needs to be corrected for misalignment. Because PVC The floor width reaches 2100 mm Thickness ranges from 2.2 to 6.5 mm. mm Due to the varying properties of the material and its relatively hardness, sufficient tension is required during the correction process to achieve the desired effect. Therefore, this device is proposed, which includes a frame, a tensioning mechanism, and a correction device.

[0059] An input end and an output end are provided on the frame. The tensioning mechanism is located near the input end. The tensioning mechanism includes a drive component and a tension roller connected to the output end of the drive component. The drive component is configured as a cylinder. The tension roller is oscillating under the drive of the drive component to control the product to always be in a tensioned state, specifically achieved using the following technical solution:

[0060] The tensioning mechanism also includes at least two sets of bases, at least two sets of rotating components, and an number of electronic scales equal to the number of driving components. In this embodiment, the bases and rotating components are arranged in two sets. The bases are fixed to the frame. One end of each rotating component is rotatably connected to the base, and the other end is hinged to the tension roller. The rotating component is a rotating rod or a rotating shaft. The output end of the driving component is connected to the rotating component. An electronic scale is installed on one side of each set of driving components.

[0061] The working mode of the tensioning mechanism is as follows: the output end of the drive component extends or contracts, driving the rotating component to rotate, which in turn drives the tension roller to swing, thereby controlling the product to maintain a tensioned state.

[0062] The tensioning mechanism is set as a "pendulum mechanism" to generate sufficient tension on the product, and this tension can be adjusted according to the product's thickness. Based on the required tension for different products, a matching method is set, using an "electro-pneumatic valve" to generate sufficient tension in the cylinder. An electronic scale on the cylinder monitors this in real time to determine whether the product is in a tensioned or relaxed state. By controlling the speed difference between the front and rear drive motors, the product achieves a "tensioning" effect, generating sufficient tension.

[0063] The web-aligning mechanism is located above the frame. The mechanism includes a rotatable web-aligning component and a power component that is drively connected to the web-aligning component. During web-aligning, the web-aligning component rotates in a predetermined direction under the drive of the power component, causing the product, which is in a tensioned state, to move and correct its orientation. The rotation of the web-aligning component is achieved using the following technical solution:

[0064] The web guiding assembly includes a web guiding frame, at least two sets of web guiding elements, at least four sets of sliding elements, a rotating support, and photoelectric sensors. The web guiding frame is mounted on top of the machine frame. Figure 3 As shown, the bottom surface of the alignment frame is connected to the output end of the power unit. The power unit is an electric cylinder. In this embodiment, two sets of alignment components are provided and installed on the top surface of the alignment frame. The alignment components are alignment rollers, which abut against the product.

[0065] Four sets of sliding components are arranged in a circular array at the four corners of the alignment frame. Mounting plates are correspondingly located at the four corners of the alignment frame. The upper end of each sliding component is connected to the mounting plate, and the lower end is slidably connected to the frame. Specifically, each sliding component includes a vertically arranged heavy-duty section and two sets of rolling sections mounted on the heavy-duty section, one above and one below. The heavy-duty section is a heavy-duty bearing. The rolling sections are rollers. Connecting components are located at corresponding positions at the four corners of the frame. The connecting components are connecting plates. The connecting components are located between adjacent rolling sections and abut against them. That is, the sliding component slides along the surface of the connecting plate when it slides. The sliding component technical solution proposed in this embodiment reduces sliding friction. If a segmented arc-shaped track is used, the manufacturing cost is high, and the installation requirements are also high. Therefore, in this embodiment, considering the small alignment range and the large resultant force (the weight of the alignment frame and the product tension), a heavy-duty bearing is used as the sliding support to ensure the sliding effect.

[0066] A rotating support is positioned between the alignment frame and the machine frame. The rotating support can be a ball joint support. The rotating support is configured to allow the alignment frame to rotate around its axis. A photoelectric sensor is mounted on the machine frame near the output end; the photoelectric sensor is configured to detect product deviation. The photoelectric sensor detects product deviation as follows: the photoelectric sensor's signal type is a switch signal, and the photoelectric sensor has upper and lower light source transmitters and receivers. When the product is defined as having no deviation in the conveying direction, and the product is between the transmitter and receiver, the light source is blocked, and the photoelectric sensor receives the signal. When the photoelectric sensor does not receive a signal, and the product is not between the transmitter and receiver, the light source is not blocked, and the product is defined as having deviated in the conveying direction.

[0067] The working mode of the correction mechanism is as follows: When the photoelectric sensor detects that the product has deviated, the output end of the power component extends or retracts, driving the correction frame to move. In turn, the correction frame drives the sliding component to slide on the connecting plate. Due to the limitation of the rotating support, the correction frame rotates around the axis of the rotating support, controlling the correction frame to rotate in the opposite direction of the product's deviation. Also, the product is in a tensioned state during correction, so the correction frame drives the product to move in order to correct the direction.

[0068] The correction mechanism provided in this embodiment differs from traditional correction devices. This embodiment optimizes the horizontal rotation device to increase the lever arm of the electric cylinder (power component) and reduce the power of the electric cylinder. The electric cylinder drives the correction frame to rotate as a whole. A rotation fulcrum is made at the feeding end of the correction frame. A drive electric cylinder is installed at the discharging end of the correction frame as a correction driver to maximize the lever arm within the correction frame and achieve optimal correction response.

[0069] Example 2

[0070] This embodiment provides an efficient web correction method under stable tension (hereinafter referred to as "this method"), based on an efficient web correction device under stable tension as described in Embodiment 1. The method includes the following steps:

[0071] Based on the product being transported, set the required tension range value for the product;

[0072] The product is conveyed from the input end to the output end, and the actual tension value of the product passing through the tension roller is detected in real time.

[0073] The relationship between the actual tension value and the required tension range value is compared to obtain the comparison result; based on the comparison result, the product is determined to be in the corresponding state, and the movement of the drive component is controlled based on the state.

[0074] Based on the movement of the driving component and the actual displacement value of the electronic ruler adjusted according to predetermined rules, the tension roller is controlled by the driving component to keep the product in a tensioned state at all times.

[0075] The product is monitored in real time using photoelectric sensors to determine if it has deviated. If so, the power unit is controlled to rotate the correction frame and the direction is corrected while the product is under tension. Otherwise, no correction is needed.

[0076] The following examples will further illustrate this method:

[0077] Traditional floating rollers often generate tension that is difficult to match the required tension of the product, requiring the addition of a balance block for adjustment, and the resulting combined force is a fixed value. This method, however, allows for the setting of corresponding process parameters based on actual production needs. The system automatically imports the set parameters when the production sequence number is created, as shown below. The number of formulas can also be increased, and the corresponding values ​​can be adjusted according to actual conditions. The table below shows... PVC Parameter table for setting floor thickness:

[0078]

[0079] exist PVC During the flooring winding process, factors such as roller wear, the product's own thickness, hardness, tensile strength, and winding speed, as well as the winding speed, can cause… PVC The tension on the floor changes beyond or below the required tension range. An excessively tight roll-up will cause… PVC Excessive tension on the floor can cause material deformation, affecting… PVC The appearance and performance of the flooring; overly tight winding can also increase the load on mechanical equipment, accelerate wear and tear, and shorten its lifespan. Furthermore, overly tight winding can also lead to… PVC Excessive tightness between floor layers results in an uneven winding effect and may even cause tension fluctuations, increasing the risk of slippage or breakage during the winding process. A loose winding state, on the other hand, will... PVC After the flooring is rolled up, the layers become loose, easily forming gaps or air bubbles, which not only affects… PVC The appearance of the flooring can also affect its performance. Furthermore, loose winding can cause the material to slip or unravel during transport and storage, increasing management difficulties.

[0080] Therefore, a tension sensor is installed on the tension roller to measure the actual tension value experienced by the product as it passes over the roller. The actual tension value is then compared in real time with the required tension range.

[0081]

[0082] Among them, state Defined as a tensioned state, state Defined as an overtight state, state Defined as a relaxed state; for t The actual tension value experienced by the product at that moment.

[0083] Based on the different states of the product, perform the corresponding operations:

[0084] (1) The product is in a certain state. If so, the original state of the driving component is maintained.

[0085] (2) The product is in a state This indicates that the product is under excessive tension. The control mechanism then contracts and reduces the product speed to decrease the tension. To keep the product in good condition .

[0086] (3) The product is in a state of condition This indicates that the tension on the product is too low. The control mechanism opens (extends) and increases the product speed, thereby increasing the tension on the product. To keep the product in good condition .

[0087] An electronic ruler is mounted on the drive component. When the drive component opens or retracts, it moves the electronic ruler, which displays the travel length of the drive component. Since the travel length of the drive component is limited, the following technical solution is proposed to further precisely control the movement of the drive component and the actual displacement value of the electronic ruler:

[0088] Adjusting the actual displacement value of the electronic ruler based on the motion of the driving component and predetermined rules includes the following steps:

[0089] The reservation rules are as follows:

[0090] K =( RH - TL ) / ( PIW . H - PIW . L ) ;

[0091] B = RH - K * PIW . H ;

[0092] X = K *Electronic ruler value+ B = K *Electronic ruler value+ RH - K * PIW . H ;

[0093] in, RH This value represents the position of the electronic ruler when the drive component (i.e., the cylinder) is fully open. PIW . H This refers to the analog signal received by the system when the drive components are fully open. TL This value represents the position of the electronic ruler when the drive component is fully retracted. PIW . L The analog quantity received by the system when the drive component is fully compressed; K The slope between the actual value and the measured value; X Value t The displacement value of the electronic ruler's position at that moment; B The displacement of the electronic scale when the drive component moves away from the fully open position; the electronic scale value is t The analog value corresponding to the location of the electronic ruler at that moment.

[0094] If the cylinder stroke is selected as 200... mm , RH This is the value of the electronic ruler at the position when the cylinder is fully open, with a displacement of 150. mm ; TL This value represents the position of the electronic ruler when the cylinder is fully retracted, with a displacement of -50. mm .

[0095] judge X and TL, RH The relationship between them leads to the following judgment:

[0096] like X < TL Then adjust the stroke length of the drive component to update. X The value is TL ;

[0097] or, X > RH Then adjust the stroke length of the drive component to update. X The value is RH ;

[0098] or, TL ≤ X ≤ RH, Then maintain the original state of the driving component. X The value remains unchanged.

[0099] when X When the value is less than the lower digit, the lower digit is used. The traction motor speed decreases compared to the drive motor speed at the front end of the production line, the cylinder opens, and the electronic ruler value remains between the high and low digits until it returns to the normal value in real time.

[0100] when X When the value is greater than the high digit, the high digit is used. The traction motor speed increases compared to the drive motor speed at the front end of the production line, and the cylinder contracts until the electronic ruler value is at the normal value in real time, so that the electronic ruler value is always between the high and low digits.

[0101] If the electronic ruler reading remains between high and low, it means the drive component is always operating within its stroke length. This significantly improves production efficiency and stability, ensures precise and reliable control, reduces mechanical wear and safety hazards, and extends service life. Tension adjustments exceeding the drive component's stroke length are compensated for by adjusting the production line speed (product speed).

Claims

1. A highly efficient web correction method under stable tension, based on a highly efficient web correction device under stable tension, characterized in that, The high-efficiency correction device includes: A rack, on which input and output terminals are provided; A tensioning mechanism is disposed near the input end; the tensioning mechanism includes a drive component and a tension roller connected to the output end of the drive component; the tension roller is configured to oscillate under the drive of the drive component to control the product to always be in a tensioned state; A correction mechanism is mounted on a frame; the correction mechanism includes: a rotatable correction component, and a power component connected to the correction component; During the correction process, the correction component rotates in a predetermined direction under the drive of the power component, causing the product in the tensioned state to move in order to correct the product's orientation. The tensioning mechanism also includes: At least two sets of bases are provided on the frame; At least two sets of rotating components are symmetrically arranged; one end of each rotating component is rotatably connected to the base and the other end is connected to the end of the tension roller; the rotating component is connected to the output end of the drive component. An electronic ruler, the same number as the driving component, is disposed on one side of the driving component; The correction component includes: A correction frame is disposed on the top of the frame; the bottom surface of the correction frame is connected to the output end of the power component; A photoelectric sensor is mounted on the frame near the output end; the photoelectric sensor is configured to detect whether the product is offset. The efficient correction method includes the following steps: Based on the product being transported, set the required tension range value for the product; The product is conveyed from the input end to the output end, and the actual tension value of the product passing through the tension roller is detected in real time. The relationship between the actual tension value and the required tension range value is compared to obtain the comparison result; based on the comparison result, the product is determined to be in the corresponding state, and the movement of the drive component is controlled based on the state. Based on the movement of the driving component and the actual displacement value of the electronic ruler adjusted according to predetermined rules, the tension roller is controlled by the driving component to keep the product in a tensioned state at all times. The product is monitored in real time using photoelectric sensors to determine if it has deviated. If so, the power unit is controlled to rotate the correction frame and the product is corrected under tension. Otherwise, no correction is needed. Adjusting the actual displacement value of the electronic ruler based on the motion of the driving component and predetermined rules includes the following steps: The reservation rules are as follows: K =( RH - TL ) / ( PIW . H - PIW . L ) ； B = RH - K * PIW . H ； X = K *Electronic ruler value+ B = K *Electronic ruler value+ RH - K * PIW . H ; in, RH This is the value at the position of the electronic ruler when the drive component is fully open. PIW . H This refers to the analog signal received by the system when the drive components are fully open. TL This value represents the position of the electronic ruler when the drive component is fully retracted. PIW . L The analog quantity received by the system when the drive component is fully compressed; K The slope between the actual value and the measured value; X for t The displacement value of the electronic ruler's position at that moment; B The displacement of the electronic scale when the drive component moves away from the fully open position; the electronic scale value is t The analog value corresponding to the position of the electronic ruler at that moment; judge X and TL, RH The relationship between them leads to the following judgment: like X < TL Then adjust the stroke length of the drive component to update. X The value is TL ; or, X > RH Then adjust the stroke length of the drive component to update. X The value is RH ; or, TL ≤ X ≤ RH, Then maintain the original state of the driving component. X The value remains unchanged; when X When the value is less than the low digit, the value is taken from the low digit; the speed of the traction motor is reduced compared to the value of the drive motor at the front end of the production line, the drive component is opened, until the electronic ruler value is normal in real time, so that the electronic ruler value is always between the high digit and the low digit. when X When the value is greater than the high value, the high value is taken; the speed of the traction motor increases compared to the value of the drive motor at the front of the production line, and the drive components retract until the electronic ruler value is normal in real time, so that the electronic ruler value is always between the high and low values. If the electronic ruler value remains between high and low, the drive unit will always operate within its own stroke length range; if the tension adjustment exceeds the stroke length of the drive unit, it will be compensated and adjusted by the production line speed.

2. The efficient correction method under tension stability as described in claim 1, characterized in that, The correction component also includes: At least two sets of correction components are disposed on the top surface of the correction frame; the correction components abut against the product; At least four sets of sliding members are arranged in a circular array; one end of each sliding member is connected to the alignment frame and the other end is slidably connected to the frame. A rotating support is disposed between the alignment frame and the machine frame; the rotating support is configured to allow the alignment frame to rotate about its axis. The sliding member includes: a heavy-duty part, which is vertically arranged; The upper and lower rolling parts are respectively located on the heavy-duty part.

3. The efficient correction method under tension stability as described in claim 2, characterized in that, The frame is provided with a connector; the connector is located between adjacent rolling parts and abuts against the rolling parts.

4. The efficient correction method under tension stability as described in claim 1, characterized in that, The driving component is a cylinder.

5. The efficient correction method under tension stability as described in claim 1, characterized in that, The power component is an electric cylinder.

6. The efficient correction method under tension stability as described in claim 1, characterized in that, Based on the comparison results, the product is determined to be in a corresponding state. The movement of the driving component is controlled based on this state, including the following steps: Among them, state Defined as a tensioned state, state Defined as an overtight state, state Defined as a relaxed state; for t The actual tension value experienced by the product at that moment; The product is in a state of condition. If so, the original state of the driving component is maintained; Or, the product is in a state of... Then, the drive components are controlled to retract and the product speed is reduced to keep the product in a certain state. ; Or, the product is in a state of... Then the control actuator will open and increase the product speed to keep the product in a state. .

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