JP3596982B2 - Motor controller for coating - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coating motor controller that controls a coating motor that transports a coating material to apply the coating material to a surface of the coating material such as paper or film.
[0002]
[Prior art]
As shown in FIG. 5, this type of conventional coating motor control device applies a coating material to a surface of a material to be coated such as paper, and presses a blade against the surface of the material to be coated after coating is started. Thus, control is performed to scrape off excess coating material from the material to be coated.
[0003]
This coating motor control device includes a controller 1 for giving control commands to necessary components, a coating motor drive control system 2, and a coating mechanism control system 3.
[0004]
The coating motor drive control system 2 includes a coating motor 5 for driving the coating roll 4, a speed detector 6 for detecting the speed of the coating motor 5, and a speed reference obtained under a speed command a1. a deviation calculating means 7 for obtaining a speed deviation a4 between a2 and the speed feedback a3 detected by the speed detector 6, a speed control means 8 for obtaining and outputting a torque reference a5 at which the speed deviation a4 becomes zero, and a torque reference a5 Conversion means 9 for converting the current reference a6 into a current reference a6, and a deviation calculating means 11 for obtaining a current deviation a8 between the current reference a6 obtained from the conversion means 9 and the current feedback a7 of the coating motor 5 detected by the current detector 10. Current control means 12 for obtaining a power conversion reference a9 such that the current deviation a8 becomes zero, a power converter 13 for supplying a motor current a10 to the coating motor 5 according to the power conversion reference a9, and the like. It is. The speed control means 8 and the current control means 12 have at least an integral element for integrating an input, but may have a configuration having a proportional / integral element. In addition, as the power converter 13, a known technology including a semiconductor element is used.
[0005]
The coating mechanism control system 3 includes a coating pump 17 for applying a coating liquid, which is a coating material, to a coating material 16 such as a paper material, and an excessive coating by pressing against a surface of the coating material 16. A blade 18 for scraping off the work material and a coater control device 19 for receiving a coating start command a11 from the controller 1 to control the coating pump 17 and the blade 18 and sending a blade touch command a12 to the controller 1 are provided. Have been.
[0006]
When the controller 1 receives the blade touch command a12 from the coater control device 19, the controller 1 controls the speed command a1 by adding a speed reference bias 13 to increase the speed reference a2.
[0007]
Next, the processing operation of the controller 1 in the control device configured as described above, particularly, the processing operation of the controller 1 will be described with reference to FIG.
When the controller 1 sends a coating start command a11 to the coating mechanism control system 3 automatically or in accordance with an operator's start instruction (ST1), the coater controller 19 sends a response command a12 indicating that the coating start command a11 has been received. At the same time as outputting, a drive command is output to the blade 18. Here, if the controller 1 determines that there is a response command, an estimated time (blade touch time) in which the blade 18 will press the workpiece 16 after the drive command is set in advance to the timer 21 and the elapse of the estimated time Thereafter, the timer 21 is turned on (ST3), a coil-on command is output (ST4), and the coil 22 is excited.
[0008]
The coil 22 normally selects the zero bias 23 for the speed command a1 and sets the speed reference bias a13 as the speed reference bias a13. However, when the coil 22 is energized by the coil-on command, a predetermined speed bias value 24 which is set in advance is selected. Then, it is added to the speed command a1 as a speed reference bias a13. Then, after the coil-on command, the timer 25 is turned on in advance after the elapse of an estimated time in which the influence of the speed increase will be eliminated (ST5), a coil-off command is output (ST6), and the coil 22 is set to the non-excited state. The bias 23 is selectively output.
[0009]
Therefore, the coating motor control device as described above drives and controls the coating motor 5 based on the normal speed reference when no coating is performed, and holds the relationship of speed reference a2 = speed command a1. On the other hand, after the coating start command a11 is output, the coil 22 is turned on after the timer 21 clocks the estimated time that the load will be applied by pressing the blade 18 against the material 16 to be coated, and the coil 22 is turned on. Is added to the speed command a1 as the speed reference bias a13. Accordingly, the speed reference a2 is increased by the speed reference bias a13 with respect to the speed command a1, the integral value of the speed control means 8 is increased, and the torque reference a5 is increased. , The speed reduction of the coating motor 5 caused by pressing can be avoided.
[0010]
By the way, if the speed bias value 24 is continuously added to the speed command a1, the speed of the coating electric motor 5 will always be faster than the speed command a1 by the speed reference bias 24 minutes due to the integration operation of the speed control means 8. Therefore, an estimated time in which the speed will not decrease even if the speed reference bias a13 is set to zero by the integration result of the speed control means 8 is set in the timer 25, and after the set time, the coil 22 is turned off and a zero value is output. Configuration.
[0011]
[Problems to be solved by the invention]
However, in the coating motor control device as described above, the load fluctuation of the coating roll 4 caused by pressing the blade 18 against the coating roll 4 via the coating material 16 and the coating material 16 In order to suppress the tension fluctuation, a speed reference bias is added to the speed command after a time when the blade 18 will come into contact with the workpiece 16 after the coating start command before the coating is started, and the speed reference bias a13 is set to zero. However, since the time during which the speed does not decrease is set and the coating motor 5 is controlled, the timing of actually applying the speed reference bias and the timing of removing the speed reference bias from the start of coating are set. Adjustment of at least two timers is required, and adjustment of the optimum speed reference bias value is required. In addition, since these adjustments require several trial runs while actually operating the apparatus, much labor and time are required, and these adjustments require the skill of an adjuster. In addition, since load characteristics change due to aging of the machine, types of paper materials and coating materials, readjustment is inevitable in some cases, and the adjustment work is very complicated.
[0012]
Further, there is a problem that a reduction in the speed cannot be avoided depending on the response speed of the speed control means 8.
The present invention has been made in view of the above circumstances, applies an appropriate bias value with almost no adjustment work, transports the workpiece at a stable speed even when the load suddenly changes, and stabilizes the coating quality. An object of the present invention is to provide a coating motor control device for improving the productivity and productivity.
[0013]
[Means for Solving the Problems]
The invention corresponding to claim 1 controls a speed of the coating motor by outputting a torque reference based on a speed deviation between a speed reference and a return speed of the coating motor that conveys the workpiece. The coating material is applied to the surface of the material to be coated which is conveyed by a coating roll connected to the coating motor, and an excessive coating material is removed by pressing a blade against the coating material. In the coating motor control device to A predetermined torque bias value is set in advance, and based on the coating start command When pressing the blade to the coating roll through the coating material Based on the issued blade touch command, Bias torque applying means for adding the predetermined torque bias value to the torque reference; Preventing a decrease in the transport speed of the material to be coated due to a load change caused when a blade is pressed against the coating roll. It is a motor control device for coating.
[0014]
According to the invention corresponding to claim 1, a predetermined torque bias suitable for a decrease in the speed of the coating motor due to a load change at the time of blade pressurization based on past knowledge, experience, etc. The value is set, the torque bias value is output from the bias torque applying unit after the coating start command, and the torque bias value is added to the torque reference. Therefore, there is no response delay by the speed control unit 8 as in the related art, and the number of adjustment elements is small. The coating motor can be controlled at a stable speed.
[0015]
The invention according to claim 2 controls the speed of the coating motor by outputting a torque reference from a speed deviation between the speed reference and the feedback speed of the coating motor, and is connected to the coating motor. In a coating motor control device for applying a coating material to the surface of a material to be coated conveyed by a coating roll, and removing excess coating material by pressing a blade against the material to be coated,
A torque bias value storage unit that stores a torque difference between a torque reference before the start of coating and a torque reference after the start of coating as a torque bias value, and is stored in the torque bias value storage unit after the start of the next and subsequent coatings. Motor for coating, comprising: a bias torque applying means for automatically adding a torque bias value to a torque reference, and a bias value removing means for automatically removing a torque bias value applied to the torque reference when coating is stopped. It is a control device.
[0016]
According to the invention corresponding to claim 2, by taking the above-described means, a torque reference before the start of coating and a torque reference after the start of coating are taken out from the drive control system for the coating motor, and both of them are taken out. The torque bias value, which is the differential torque based on the torque, is set. The torque bias value is automatically added to the torque reference after the next coating starts, and the torque bias value is automatically removed from the torque reference when coating is stopped. The torque bias value can be obtained accurately without any adjustment work using the construction line. In addition, since a predetermined torque bias value is always applied instantaneously from the start of coating to the end of coating, timing adjustment is not only necessary, and the coating motor can be controlled at a stable speed even when the load changes suddenly. It can greatly contribute to stabilization of work quality and productivity.
[0017]
Further, the invention according to claim 3 controls the speed of the coating motor by outputting a torque reference from a speed deviation between the speed reference and the return speed of the coating motor, and connects the motor to the coating motor. In a coating motor control device for applying a coating material on the surface of the material to be coated conveyed by a coating roll to be applied, and pressing a blade against the coating material to remove excess coating material, The torque reference and the coating before starting the coating for at least one of the condition items such as the type of the coating material, the material of the material to be coated, the speed at the time of coating, the outside air temperature, the humidity, etc. Torque bias value storage means for storing a torque bias value which is a difference torque from the torque reference after the start, and a torque bias value based on a condition item input at the start of coating or a condition item detected from a coating line. Applicable condition from storage means A coating machine equipment control device provided with a bias torque application unit that extracts a torque bias value corresponding to the eye and adds the torque bias value to the torque reference, and a bias value removal unit that removes the torque bias value from the torque reference when coating is stopped. .
[0018]
According to the invention corresponding to claim 3, by taking the above-described means, the load can be changed depending on the condition items such as the type of the coating material, the material of the material to be coated, the speed at the time of coating, the outside air temperature, and the humidity. In consideration of the occurrence of fluctuation, an optimal torque bias value is extracted and set in advance for each of one or more or a plurality of combinations, and when a condition item is instructed, a torque reference corresponding to the condition item is added. Despite changes in load characteristics depending on the type of coating material and the material of the material to be coated, it is possible to apply the optimal torque bias value that matches the condition items. It is possible to correct the torque bias value corresponding to the speed reduction, and since the torque correction is performed after the speed control means, there is no response delay by the speed control means, and the stable production of high quality products with excellent response speed. it can
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
(First Embodiment)
FIG. 1 is a configuration diagram showing one embodiment of a coating motor control device according to claim 1. Note that the same reference numerals in FIG. 5 denote the same parts as in FIG.
[0020]
This control device includes a controller 30, a coating motor drive control system 40, and a coating mechanism control system 50.
The controller 30 receives a coating instruction from an operator, outputs a coating start command, executes other necessary processes, a sequence program for inputting a coating instruction and a torque bias value, and a bias torque if necessary. A display means 32 for displaying other data is provided, and a bias torque applying means 33 is further provided.
[0021]
The bias torque applying unit 33 receives the blade touch command a33 and the coating stop command from the coater control device 51 constituting the coating mechanism control system 50 in addition to the zero value setting unit 33a and the correction torque setting unit 33b. A bias value selection output unit 33c for selectively outputting the zero value of the zero value setting unit 33a or the torque bias value of the torque correction setting unit 33b is provided. As the torque bias value of the correction torque setting unit 33b, a value grasped from past knowledge, experience, and the like is set from the input unit 31. Alternatively, a change in torque reference before and after the start of coating may be measured, and a torque corresponding to the change may be set.
[0022]
The coating motor drive control system 40 uses a speed command as a speed reference and calculates a deviation a4 between the speed reference and a speed feedback a3 from a speed detector 6 attached to the coating motor 5. 7, a speed control means 8 for obtaining and outputting a torque reference a5 at which the speed deviation a4 becomes zero, a torque reference a5 obtained by the speed control means 8, and a torque bias value applied from the bias torque applying means 33. a31, and a torque correcting means 41 for avoiding a decrease in the transport speed due to a load variation caused when the grade 18 presses the coating roll 4 via the material 16 to be coated, and a corrected torque Standards A conversion means 9 for converting the current reference a6, a deviation calculating means 11 for obtaining a current deviation a8 between the current reference a6 obtained from the conversion means 9 and the current feedback a7 detected by the current detector 6, and a current deviation a7 Is constituted by a current control means 12 for obtaining a power conversion reference a9 such that is zero, and a power converter 13 for supplying a motor current a10 to the coating motor 5 according to the power conversion reference a9. The coating motor 5 drives and controls the coating roll 4 that transports a coating material 16 such as paper.
[0023]
Next, the operation of the above device will be described.
First, a grade 18 is assigned to the correction torque setting unit 33b of the bias torque applying unit 33 based on past knowledge and experience. Coating roll A torque bias value corresponding to avoiding a decrease in the transport speed due to a load change that occurs when the sheet is pressed to the position No. 4 is set.
[0024]
When the coating line is operated in the above state, the zero value of the zero value setting unit 33a of the bias torque applying unit 33 is selected and applied to the torque correcting unit 41. At this time, the torque reference a5 is directly introduced into the current conversion means 9.
[0025]
When receiving the coating instruction from the input means 31, the controller 30 outputs a coating start instruction a32 and sends it to the coater control device 51. The coater control device 51 drives the blade 18 to press it against the workpiece 16, and at the same time, sends a blade touch command a 33 to the controller 30.
[0026]
Here, the bias value selection output unit 33c of the controller 30 selects the correction torque setting unit 33b side from the zero value setting unit 31a side, and outputs the torque bias value set in the correction torque setting unit 33b to the torque correction unit 41. To send to. Here, the torque correction unit 41 adds the torque bias value a31 to the torque reference a5, and introduces it into the current conversion unit 9.
[0027]
As a result, the torque that would cause the blade 18 to be pressed by the coating roll 4 and reduce the speed of the coating motor 5 is instantaneously compensated for, the speed before coating is maintained, and the material to be coated is maintained. Can be kept constant.
[0028]
Then, when receiving the coating stop signal from the coater control device 51, the bias value selection output unit 33c selects the zero value setting unit 33a side from the correction torque setting unit 33b side, and sends the zero value to the torque correction unit 41. It sends it out and returns to the state before the start of coating.
[0029]
Therefore, according to the above-described embodiment, a predetermined torque bias value corresponding to the load or the speed reduction is set in advance based on the past knowledge, experience, and the like. Since the value a31 is output and added to the torque reference, there is no delay of the speed control means 8 as in the related art, and the insufficient torque after the start of coating is instantaneously compensated, so that the response speed is improved and the adjustment work is simplified. High speed and stable operation can be ensured.
(Second embodiment)
FIG. 2 is a configuration diagram showing an embodiment of the coating motor control device according to the second aspect. In this coating motor control device, the coating motor drive control system 40 and the coating mechanism control system 50 are the same as those shown in FIG. The improved part of will be described.
[0030]
The controller 30 determines before and after the start of coating based on the sequence program, the input unit 31 and the display unit 32 as well as the coating start command and the blade touch command as in FIG. A torque reference input means 34 for taking in a torque reference and a torque reference after the start of coating, and a differential torque between the torque reference before the start of coating and the torque reference after the start of coating, which is taken in by the torque reference input means 34. A torque bias value storage means 35 for storing a certain torque bias value, and a preset zero value when no coating is performed, and the torque bias value stored in the torque bias value storage means 35 for the next and subsequent coatings. A bias torque applying means 36 for outputting and adding to the torque reference, and outputting a zero value when coating is stopped to remove the torque bias value added to the torque reference. A bias value removing unit 37 is provided.
[0031]
Next, the operation of the apparatus configured as described above will be described.
First, prior to the first coating, the torque reference input means 34 fetches a torque reference before the start of coating at the same time as the coating start command or based on a torque fetch instruction from the input means 31 and stores the torque reference in the torque bias value storage means 35. Remember. Thereafter, when the blade touch command a33 is received from the coater control device 51, the torque reference after the start of coating is fetched and stored in the torque bias value storage means 35. Obtain the torque difference from the torque reference after the start. Further, after taking in the torque reference after the start of coating, the torque reference before the start of coating is read out from the torque bias value storage means 35, and the torque difference between the torque reference before the start of coating and the torque reference after the start of coating is obtained. Is stored in the torque bias value storage means 35 as a torque bias value.
[0032]
After the torque bias value is obtained in this way, after the next and subsequent coating starts, that is, when the blade touch command a33 is received, the torque bias value stored in the torque bias value storage means 35 is automatically read and the torque bias value is read. It is sent to the correction means 41 and added to the torque reference to compensate for the insufficient torque after the start of coating.
[0033]
Thereafter, when the blade touch command disappears or when the coating stop command is received from the coater control device 51, the bias value removing means 35 takes in a zero value in place of the torque bias value which is the torque difference, and the torque correction means. Sending to 41 removes the resulting torque bias value added to the torque reference.
[0034]
Therefore, according to the above-described embodiment, the difference torque between the torque reference before the start of coating and the torque reference after the start of coating is set as the torque bias value, and the torque reference is automatically set after the start of the next or subsequent coating. In addition, the torque bias value automatically added to the torque reference when the coating is stopped is automatically removed, so that the torque bias value can be accurately obtained without operating the coating line while operating the coating line. Further, since a predetermined torque bias value is always applied from the output side of the speed control means 8 from the start of coating to the end of coating, the response speed can be increased, and the coating speed can be maintained at a stable speed even when the speed changes rapidly. The motor can be driven, which greatly contributes to stabilization of coating quality and productivity. Particularly, a predetermined torque bias value can be constantly applied from the start of coating to the end of coating because a speed control loop is provided outside to perform stable control.
(Third embodiment)
FIG. 3 is a block diagram showing one embodiment of the coating motor control device according to claim 3. In this coating motor control device, the coating motor drive control system 40 and the coating mechanism control system 50 have the same configuration as that of FIG. Only the improved part of the controller 30 will be described.
[0035]
The controller 30 includes a sequence program, an input unit 31 and a display unit 32, as well as a type of a coating material, a material of a material to be coated, a speed at the time of coating, an outside air temperature, and a humidity. Paying attention to the fact that the load characteristics change when the blade is pressed against the work 16, the torque reference before the start of the coating and the torque after the start of the coating are determined in advance for each of the above-described one condition item or a combination of a plurality of condition items. It has a torque bias value storage means 38 for storing the difference torque from the reference as a torque bias value, a zero value setting section 39a and a correction torque setting section 39b, wherein the correction torque setting section 39b is provided by an operator or a host production management computer. From the torque bias value storage means 38 on the basis of the condition item extraction instruction or the condition item extraction instruction based on detection from the coating line. A bias torque is set according to an item extraction instruction, and includes a bias value selection output unit 39c for selectively outputting a zero value of the zero value setting unit 39a or a torque bias value of the torque correction setting unit 39b. An applying unit 39A and a bias value removing unit 39B are provided.
[0036]
The bias value removing unit 39B receives the coating stop signal from the coater control device 51 or, when the blade touch command is lost, replaces the output of the correction torque setting unit 39b with the zero value of the zero value setting unit 39a. The selection has the function of removing the torque bias value as a result.
[0037]
Next, the operation of the above embodiment will be described.
First, the coating line is operated for each necessary condition item or a combination of a plurality of condition items, and the torque bias value storage means 38 stores a torque bias which is a difference between the torque reference before the start of coating and the torque reference after the coating. Set the value.
[0038]
After setting the torque bias value in the torque bias value storage means 38 as described above, when the operator inputs a condition item extraction instruction from an input device, a higher-level production management computer, or a necessary sensor of a coating line, the torque bias value storage means The torque bias value according to the condition item extraction instruction from the means 38 is set in the torque correction setting unit 39b.
[0039]
In this state, the coating line is operated. When no coating is performed, the bias value selection output unit 39c selects the zero value of the zero value setting unit 39a and applies it to the torque correction unit 41. In this case, the torque reference obtained from the speed control means 8 is sent to the current conversion means 9 as it is.
[0040]
Thereafter, when the controller 30 sends the coating start command a32 to the coater control device 51, the coater control device 51 operates the coating pump 17 to apply the coating material to the coating target material 16, The blade 18 is pressed against the coating roll 4 to send a blade touch command a33.
[0041]
When the controller 30 receives the blade touch command a33 from the bias value selection output unit 39c, the controller 30 selects the torque correction setting unit 39b and sends the torque bias value a31 to the torque correction unit 41. Here, the torque correction means 41 adds the torque bias value a31 to the torque reference a5 and introduces the torque bias value a31 into the current conversion means 9, and the speed of the coating motor 5 due to the pressure of the blade 18 on the coating roll 4. By instantaneously compensating for the reduced torque and maintaining the speed before coating, the tension applied to the workpiece 16 can be kept constant.
[0042]
Therefore, when the conventional device is compared with the control device according to the first to third aspects of the present invention as described above, the result shown in FIG. 4 is obtained. In other words, when no correction is performed despite the pressing of the blade 18 against the coating roll 4, the speed of the coating motor 5 is greatly reduced as shown in FIG. In the case of the device in which the speed reference bias a13 is added to the reference a2, the speed reduction is considerably improved, but the speed is reduced as shown in FIG.
[0043]
However, in the case of correcting the torque bias value in the apparatus of the present invention, the speed before the coating can be surely maintained by instantaneously supplementing the torque corresponding to the reduction in the speed of the coating motor 5. In addition, in the conventional apparatus, since the timer 25 is turned off after a predetermined time after the blade pressurization due to the start of coating, adjustment and timing of the timer setting time become difficult. After pressurizing the blade at the start, a constant torque bias value may be applied until the blade is opened at the end of coating, so that time adjustment and the like become unnecessary, and correction processing can be easily performed.
[0044]
The controller 30 and the coating motor drive control system 40 may be integrated, or may be completely separated from each other, and the controller 30 may apply a torque bias value to the coating motor drive control system 40. Further, the torque bias value may be any of analog and digital (parallel and serial) transmissions.
[0045]
【The invention's effect】
As described above, according to the present invention, the following various effects can be obtained.
According to the first aspect of the present invention, a predetermined torque bias value is set in advance according to the past knowledge, experience, etc., in accordance with the speed reduction of the coating motor due to the load fluctuation at the time of blade pressurization, and after the coating start command, the torque bias value is set. Since it is added to the torque reference, there is no response delay due to the speed control means as in the related art, there are few adjustment elements, and the coating motor can be controlled at a stable speed.
[0046]
According to the invention of claim 2, a torque bias value which is a difference torque between a torque reference before the start of coating and a torque reference after the start of coating is set, and automatically added to the torque reference after the start of next and subsequent coatings, Since the torque bias value is automatically removed from the torque reference when coating is stopped, the torque bias value can be obtained accurately without any adjustment work, and the specified torque bias value is applied instantaneously from the start of coating to the end of coating. Therefore, it is not necessary to adjust the timing, and the coating motor can be controlled at a stable speed even when the speed changes suddenly, which can greatly contribute to stabilization of coating quality and productivity.
[0047]
According to the third aspect of the present invention, an optimum torque bias value is set for each one or a plurality of combinations of condition items that cause load fluctuation, and when a condition item is instructed, the torque bias value is added to a torque reference corresponding to the condition item. Therefore, it is possible to instantaneously correct the torque bias value that matches the speed reduction after starting coating with the optimal torque bias value that matches the condition items such as the type of coating material and the material of the material to be coated. Excellent and high quality products can be produced stably.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of a coating motor control device according to claim 1.
FIG. 2 is a configuration diagram showing one embodiment of a coating motor control device according to claim 2;
FIG. 3 is a configuration diagram showing one embodiment of a coating motor control device according to claim 3;
FIG. 4 is a comparison diagram of speed correction by a conventional device and torque correction by the device of the present invention.
FIG. 5 is a configuration diagram of a conventional device.
FIG. 6 is a diagram illustrating an operation procedure of a conventional device.
[Explanation of symbols]
4: coating roll, 5: coating motor, 16: coating material, 17: coating pump, 18: grade, 30: controller, 33, 36, 39A: bias torque applying means, 35, 38: torque Bias value storage means, 37, 39B: bias value removing means, 40: coating motor drive control system, 41: torque correction means, 50: coating mechanism section control system, 51: coater control device.

Claims (3)

While controlling the speed of the coating motor by outputting a torque reference based on the speed deviation between the speed reference and the return speed of the coating motor that conveys the material to be coated, the motor is connected to the coating motor. A coating motor applied to the surface of the material to be coated conveyed by a coating roll, and pressing a blade against the material to be coated to remove excess coating material. ,
A predetermined torque bias value is set in advance, and based on a blade touch command issued when pressing a blade against a coating roll through the material to be coated under a coating start command , the predetermined torque based on the torque reference. setting the bias torque applying means for applying a torque bias value,
A coating motor control device for preventing a decrease in a conveying speed of the material to be coated due to a load change caused when a blade is pressed against the coating roll . While controlling the speed of the coating motor by outputting a torque reference based on the speed deviation between the speed reference and the return speed of the coating motor that conveys the material to be coated, the motor is connected to the coating motor. A coating motor applied to the surface of the material to be coated conveyed by a coating roll, and pressing a blade against the material to be coated to remove excess coating material. ,
Torque bias value storage means for storing a torque bias value which is a difference torque between the torque reference before the start of coating and the torque reference after the start of coating,
After the start of the next or subsequent coating, a bias torque applying unit that automatically adds the torque bias value stored in the torque bias value storage unit to the torque reference,
Bias value removing means for automatically removing the torque bias value that has been added to the torque reference when coating is stopped,
A coating motor control device, comprising: While controlling the speed of the coating motor by outputting a torque reference based on the speed deviation between the speed reference and the return speed of the coating motor that conveys the material to be coated, the motor is connected to the coating motor. A coating motor applied to the surface of the material to be coated conveyed by a coating roll, and pressing a blade against the material to be coated to remove excess coating material. ,
The torque reference and the coating before starting the coating for at least one of the condition items such as the type of the coating material, the material of the material to be coated, the speed at the time of coating, the outside air temperature, the humidity, etc. Torque bias value storage means for storing a torque bias value that is a difference torque from the torque reference after the start,
After the start of coating, a bias torque applying means for taking out a torque bias value corresponding to the corresponding condition item from the torque bias value storage means based on the input of the condition item or the condition item detected from the coating line and adding the torque bias value to the torque reference. When,
Bias value removing means for removing the torque bias value added to the torque reference when coating is stopped,
A coating motor control device, comprising:

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