Servo control system of lead screw rotary spraying machine

Abstract

The utility model relates to the field of coating machines, and provides a servo control system of a lead screw rotating coating machine, which comprises an input unit, a simulation unit, a control unit and a driving unit, wherein the output end of the input unit is electrically connected with the input end of the control unit, and the input unit is used for inputting servo motor motion parameters to the control unit; the output end of the simulation unit is electrically connected with the input end of the control unit, and the simulation unit is used for collecting the operation state of the servo motor and feeding back the operation state to the control unit. The output end of the control unit is electrically connected with the input end of the driving unit, and the output end of the driving unit is electrically connected with the servo motor and used for controlling the servo motor to move. According to the utility model, the automatic control of the lead screw rotary spraying machine is realized, so that the lead screw rotary spraying machine can carry out uniform and efficient automatic spraying, and the automatic production requirement of corollary equipment is met.

Description

Technical Field

[0001] The utility model relates to the field of spraying machines, in particular to a servo control system of a screw rotary spraying machine. Background Art

[0002] A screw-type rotary sprayer primarily utilizes the rotational motion of a screw to move the spray gun or spraying component. It is a mechanical component that converts rotational motion into linear motion. Specifically, when the screw is driven to rotate, the nut connected to the spraying component moves along the screw's axis, causing the spraying component to move and spray the surface. During the spraying process, the paint is sprayed through the spraying component at a certain pressure and in an atomized state.

[0003] The existing method is usually manual spraying, which usually has problems such as uneven surface spraying and easy concentration of paint, and cannot meet the production needs of supporting equipment. Therefore, how to realize the automated control of the screw rotary sprayer and realize its automatic spraying so that it can spray objects evenly and efficiently during the production process has become an urgent problem to be solved. Utility Model Content

[0004] In view of this, the utility model proposes a servo control system for a screw rotary sprayer to realize automatic control of the screw rotary sprayer, so that the screw rotary sprayer can perform uniform and efficient automatic spraying to meet the automated production requirements of supporting equipment.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A servo control system for a screw rotary spraying machine, the servo control system comprising: an input unit, a simulation unit, a control unit and a drive unit;

[0007] The output end of the input unit is electrically connected to the input end of the control unit, and is used to input the motion parameters of the servo motor into the control unit;

[0008] The output terminal of the simulation unit is electrically connected to the input terminal of the control unit, and is used to collect the operating status of the servo motor and feed it back to the control unit;

[0009] The output end of the control unit is electrically connected to the input end of the driving unit, and the output end of the driving unit is electrically connected to the servo motor for controlling the movement of the servo motor.

[0010] Based on the above technical solution, preferably, the drive unit includes a screw servo drive and a rotary servo drive, wherein the input end of the screw servo drive is electrically connected to the output end of the control unit; the input end of the rotary servo drive is electrically connected to the output end of the control unit, the output end of the screw servo drive is electrically connected to the screw motor, and the output end of the rotary servo drive is electrically connected to the rotary motor.

[0011] On the basis of the above technical solution, preferably, the driving unit further includes a first relay, a second relay and a switching power supply;

[0012] Among them, the coils of the first relay and the second relay are electrically connected to the control unit, one end of the contact of the first relay is electrically connected to the screw servo driver, one end of the contact of the second relay is electrically connected to the rotary servo driver, and the other end of the contact of the first relay and the second relay is commonly connected to one end of the switching power supply, and the other end of the switching power supply is connected to the external power supply.

[0013] On the basis of the above technical solution, preferably, the input unit is a touch screen; the input unit is electrically connected to the control unit via an Ethernet interface, and is used to collect input servo motor motion parameters and send them to the control unit.

[0014] On the basis of the above technical solution, preferably, the analog unit includes a drawstring displacement encoder and an analog input and output module;

[0015] The output end of the drawstring displacement encoder is electrically connected to the input end of the analog input and output module, and the drawstring displacement encoder is used to collect the motion state of the screw motor rotating motor;

[0016] The analog input and output module is electrically connected to the control unit.

[0017] On the basis of the above technical solution, preferably, a spray control module is further included, one end of the spray control module is electrically connected to the control unit, and the other end is electrically connected to the solenoid valve, which is used to control the speed of paint feeding and feed it back to the control unit.

[0018] On the basis of the above technical solution, preferably, the spray control module includes a third relay, a connection socket, an emergency stop switch, a control switch and a KAO relay;

[0019] Among them, one end of the connecting socket is electrically connected to the contacts of the KAO relay and the emergency stop switch respectively, the other end of the emergency stop switch is electrically connected to the control switch, the other end of the control switch is electrically connected to the coil of the KAO relay, the other end of the contacts of the KAO relay is electrically connected to the switching power supply and one end of the contacts of the third relay respectively, the other end of the contacts of the third relay is connected to the solenoid valve, the coil of the third relay is electrically connected to the control unit, and the connecting socket is connected to an external 220V voltage.

[0020] On the basis of the above technical solution, preferably, the simulation unit further includes a pressure transmitter, the output end of the pressure transmitter is electrically connected to the input end of the analog input and output module, and is used to collect the feed pressure of the paint and feed it back to the control unit.

[0021] On the basis of the above technical solution, preferably, the driving unit further includes a fourth relay and a fifth relay;

[0022] Among them, the coils of the fourth relay and the fifth relay are electrically connected to the control unit; the contacts of the fourth relay are electrically connected to the enable port of the screw servo driver, and the contacts of the fifth relay are electrically connected to the enable port of the rotary servo driver.

[0023] Based on the above technical solution, preferably, the input unit model is a text display of 700-IE-V4; the servo motor motion parameters include at least one or a combination of at least two of the rotation speed parameters, feed speed parameters, spraying start point setting parameters, and spraying end point setting parameters.

[0024] The servo control system of a screw rotary spraying machine provided by the utility model has the following beneficial effects compared with the prior art:

[0025] (1) The utility model provides a servo control system for a screw rotary sprayer, in which an input unit is used to input motion parameters of a servo motor to a control unit, a simulation unit is used to feed back the motion state of the servo motor to the control unit, and the control unit controls the drive unit to drive the servo motor based on the motion parameters of the servo motor and the current motion state of the servo motor, thereby controlling the motion of the servo motor. The system can realize automatic control of the servo motor and automatic spraying of the screw rotary sprayer.

[0026] (2) The present invention can also control the spraying of the paint through a servo control system, further realizing precise control of the spraying of the screw rotary sprayer, thereby improving the spraying quality and spraying efficiency. It can ensure that the paint is evenly covered on the surface of the sprayed object, and at the same time, a large area spraying work can be completed in a shorter time, and the spraying accuracy can be controlled. In this way, it is more suitable for the needs of automated production.

[0027] (3) The servo control system provided by the utility model has the advantages of simple structure, easy operation and high control accuracy. At the same time, the servo control system is a stable and reliable universal control system that can realize the control of screw rotary sprayers of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 This is a system architecture diagram of a servo control system for a screw rotary spraying machine provided by the present invention;

[0030] Figure 2 This is a system architecture diagram of a servo control system for another screw rotary spray machine provided by the present invention;

[0031] Figure 3 This is an electrical structure diagram of a servo control system for a screw rotary spraying machine provided by the utility model;

[0032] Figure 4 This is an electrical structure diagram of a servo control system of another screw rotary spray machine provided by the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] A screw-type rotary sprayer primarily utilizes the rotational motion of a screw to move the spray gun or spraying component. It is a mechanical component that converts rotational motion into linear motion. To achieve automated spraying with a screw-type rotary sprayer, the motor drives the screw to rotate. The nut on the screw, which is connected to the spraying component, moves along the axis of the screw, causing the spraying component to move evenly along the set path and speed. Simultaneously, paint is sprayed through the spraying component at a certain pressure and in an atomized state, effectively coating the surface of the object.

[0035] The automated spraying of the screw rotary sprayer can improve the quality of spraying. Specifically, it can ensure that the paint is evenly covered on the surface of the sprayed object, avoiding quality problems such as uneven thickness, spray leakage, and sagging, making the coating surface smoother and flatter; and, automated spraying can improve spraying efficiency. Compared with manual spraying, it can complete large-area spraying work in a shorter time; at the same time, automated spraying can achieve the purpose of precise control of spraying. Specifically, by precisely controlling the rotation speed and rotation angle of the screw and the spraying parameters of the spraying parts (spray gun), the spraying position, coating thickness, etc. can be precisely controlled to suit production scenarios with high spraying accuracy requirements, such as the spraying of some precision instruments; finally, automated spraying can adapt to complex shapes. For some objects with complex shapes, by programming the movement of the screw, the spray gun can be sprayed along complex curves or surfaces to meet diverse spraying needs.

[0036] Based on the above description, the present invention provides a servo control system for a screw rotary sprayer, which is used to achieve automated spraying of the screw rotary sprayer. The servo control system provided by the present invention has the advantages of simple structure, easy operation, and high control accuracy. At the same time, as a stable and reliable universal control system, the servo control system can realize the control of screw rotary sprayers of various specifications.

[0037] Figure 1 This is a system architecture diagram of a servo control system for a screw rotary spraying machine provided in an embodiment of the present application. Figure 1 As shown, the servo control system includes: an input unit 1, a simulation unit 2, a control unit 3 and a drive unit 4.

[0038] Among them, the output end of the input unit 1 is electrically connected to the input end of the control unit 3, the output end of the simulation unit 2 is electrically connected to the input end of the control unit 3, the output end of the control unit 3 is electrically connected to the input end of the drive unit 4, and the output end of the drive unit 4 is used to connect the servo motor of the screw rotary sprayer.

[0039] The input unit 1 is used to input the servo motor motion parameters to the control unit 3. These include but are not limited to rotation speed parameters, feed speed parameters, spraying start point settings, spraying end point settings, etc. It can be understood that these motion parameters are used to control the servo motion of the servo motor, and thus control the spraying trajectory of the screw rotary sprayer.

[0040] Exemplarily, the input unit 1 can be a touch screen. The touch screen can be electrically connected to the control unit 3 via an Ethernet interface. Specifically, the touch screen is used to realize human-computer interaction, collect the servo motor motion parameters input by the user and send them to the control unit 3. In this way, a good human-computer interaction interface can be formed, so that the servo control system can meet more spraying requirements. In this way, the software program is highly readable and portable. Exemplarily, the touch screen can adopt a text display of model 700IEV4, which is used to collect the servo motor motion parameters input by the user and send the collected servo motor motion parameters to the programmable control unit 3.

[0041] The simulation unit 2 is used to collect the operating status of the servo motor and feed it back to the control unit 3. Exemplarily, the simulation unit 2 is connected to the control unit 3 through an expansion interface to achieve communication control between the two. Specifically, the simulation unit 2 can be an EM AM06 analog input and output module. By collecting analog quantities, it monitors the motion state of the servo motor in real time, and then communicates with the control unit 3 to feed back the motion state of the servo unit to the control unit 3, so that the control unit 3 adjusts the control signal output to the drive unit 4 based on the current motion state, and achieves open-loop speed, position, etc. control of the servo motor by generating high-speed pulses.

[0042] The control unit 3 can be a programmable logic controller PLC. For example, the control unit 3 can include modules such as bit logic, counters, timers, complex mathematical operations, and intelligent communication units, which are used to monitor the input status of the PLC (including the servo motor motion parameters input by the input unit 1 and the operating status of the servo motor input by the simulation unit 2) and change the output status to achieve the purpose of controlling the drive unit 4.

[0043] For example, the programmable logic controller can be an ST30 PLC. The ST30 series is a micro PLC capable of controlling a variety of devices to meet automation control requirements. The ST30's user program includes instructions for bit logic, counters, timers, complex mathematical operations, and communication with other intelligent modules, enabling it to monitor input states and change output states to achieve control objectives.

[0044] The drive unit 4 is used to drive the servo motor to move according to the output of the control unit 3. Exemplarily, the drive unit 4 includes a screw servo driver 41 and a rotary servo driver 42. The input end of the screw servo driver 41 is electrically connected to the output end of the control unit 3; the input end of the rotary servo driver 42 is electrically connected to the output end of the control unit 3, the output end of the screw servo driver 41 is electrically connected to the screw motor, and the output end of the rotary servo driver 42 is electrically connected to the rotary motor. That is, the screw servo driver 41 is used to drive the screw motor to move according to the output of the control unit 3. The rotary servo driver 42 is used to drive the rotary motor to move according to the output of the control unit 3. The screw motor is used to drive the screw to perform translational motion, and the rotary motor is used to drive the screw to perform rotational motion.

[0045] Exemplarily, the model of the screw servo driver 41 and the rotary servo driver 42 can be SV660PS2R8I. It can be connected to the control unit 3 through its own CN3 port to transmit signals to each other. The CN1 port it carries is provided with a plurality of input and output terminals. By referring to these terminals, the parameters such as the speed, forward and reverse rotation, given distance, positioning feedback and fault signal of the servo motor can be controlled. Its working principle is to receive the pulse signal output by the control unit 3 (PLC control program), including automatic signal, manual signal, limit signal, origin signal, etc., and convert this signal into a drive signal that controls the switching frequency, direction and number of pulses of the servo motor stator winding in turn, so that the servo motor runs, and the coupling connected to the servo motor drives the module to drive the screw to perform servo motion.

[0046] Based on the above description, in the servo control system provided in the present embodiment, the input unit 1 is used to input the servo motor motion parameters to the control unit 3, the simulation unit 2 is used to feed back the motion state of the servo motor to the control unit 3, and the control unit 3 controls the drive unit 4 to drive the servo motor according to the servo motor motion parameters and the current motion state of the servo motor, so as to realize the control of the servo motion of the servo motor. The system can realize the automatic control of the servo motor and realize the automatic spraying of the screw rotary sprayer. This can improve the spraying quality and spraying efficiency. It can ensure that the coating is evenly covered on the surface of the sprayed object, and at the same time, large-area spraying work can be completed in a shorter time, and the spraying accuracy can be controlled. In this way, it is more adaptable to the automated production demand. And the system has the advantages of simple structure, easy operation and high control accuracy. At the same time, as a stable and reliable universal control system, it can realize the control of the screw rotary sprayer of various specifications.

[0047] Based on the above description, Figure 2 This is a system architecture diagram of another servo control system of a screw rotary spraying machine provided in an embodiment of the present application. Figure 2As shown, the servo control system includes not only the above-mentioned input unit 1 , simulation unit 2 , control unit 3 and drive unit 4 , but also a spraying control module 5 .

[0048] The connection between the drive unit 4 and the control unit 3 is as follows:

[0049] The drive unit 4 includes a first relay 43, a second relay 44, and a switching power supply 45. The coils of the first relay 43 and the second relay 44 are electrically connected to two ports of the control unit 3, respectively. One end of the contact of the first relay 43 is electrically connected to the lead screw servo driver 41, and one end of the contact of the second relay 44 is electrically connected to the rotary servo driver 42. The other ends of the contacts of the first relay 43 and the second relay 44 are connected to one end of the switching power supply 45, and the other end of the switching power supply 45 is connected to an external power supply.

[0050] As can be understood, the control unit 3 controls the lead screw servo driver 41 and the rotary servo driver 42 via the first relay 43 and the second relay 44. Specifically, when the control unit 3 outputs a control signal to energize the coil of the first relay 43, the contacts of the first relay 43 close, and the switching power supply 45 supplies power to the lead screw servo driver 41 through the closed contacts of the first relay 43, causing the lead screw servo driver 41 to drive the lead screw motor to rotate. When the control unit 3 outputs a control signal to de-energize the coil of the first relay 43, the contacts of the first relay 43 open, de-energizing the lead screw servo driver 41 and no longer driving the lead screw motor to rotate. Similarly, when the control unit 3 outputs a control signal to energize the coil of the second relay 44, the contacts of the second relay 44 close, and the switching power supply 45 supplies power to the rotary servo driver 42 through the closed contacts of the second relay 44, causing the rotary servo driver 42 to drive the rotary motor to rotate. When the control unit 3 outputs a control signal to de-energize the coil of the second relay 44, the contacts of the second relay 44 open, de-energizing the rotary servo driver 42 and no longer driving the rotary motor to rotate.

[0051] Exemplarily, the drive unit 4 also includes a fourth relay 46 and a fifth relay 47. The coils of the fourth relay 46 and the fifth relay 47 are electrically connected to the control unit 3. The contacts of the fourth relay 46 are electrically connected to the enable port of the screw servo driver 41, and the contacts of the fifth relay 47 are electrically connected to the enable port of the rotation servo driver 42. It can be understood that the drive unit 4 enables the screw servo driver 41 and the rotation servo driver 42 through the fourth relay 46 and the fifth relay 47. That is, when the control unit 3 wants to select the screw servo driver 41, it needs to output a control signal so that the coil of the fourth relay 46 is powered on and the coil of the fifth relay 47 is not powered on. In this way, the contacts of the fourth relay 46 are closed, the screw servo driver 41 is selected, and then the control unit 3 controls the operation of the screw servo driver 41 by controlling the power-on status of the coil of the first relay 43. To select the rotary servo driver 42, it is necessary to output a control signal so that the coil of the fifth relay 47 is powered on and the coil of the fourth relay 46 is not powered on. In this way, the contacts of the fifth relay 47 are closed, and the rotary servo driver 421 is selected. Then the control unit 3 controls the operation of the rotary servo driver 42 by controlling the power-on status of the coil of the second relay 44.

[0052] The connection between the simulation unit 2 and the control unit 3 is as follows:

[0053] The simulation unit 2 may include a draw wire displacement encoder 21 , an analog input and output module 22 and a pressure transmitter 23 .

[0054] Specifically, the output end of the cable displacement encoder 21 and the output end of the pressure transmitter 23 are electrically connected to two input ends of the analog input and output module 22 respectively, and the output end of the analog input and output module 22 is electrically connected to the input end of the control unit 3.

[0055] The cable displacement encoder 21 is used to collect the motion state of the screw motor and feed it back to the control unit 3 through the analog input and output module 22. The pressure transmitter 23 is used to collect the feed pressure of the paint and feed it back to the control unit 3 through the analog input and output module 22.

[0056] The output of the control unit 3 is also electrically connected to the input of the spray control module 5. One end of the spray control module 5 is electrically connected to the control unit 3, and the other end is electrically connected to the solenoid valve. The spray control module 5 is used to control the speed of the paint feed according to the output of the control unit 3.

[0057] Exemplarily, the spray control module 5 includes a third relay 51, a connection socket 52, an emergency stop switch 53, a control switch 54, and a KAO relay 55. One end of the connection socket 52 is connected to an external 220V voltage, and the other end is electrically connected to one end of the emergency stop switch 53 and the contacts of the KAO relay 55. The other end of the emergency stop switch 53 is connected to one end of the control switch 54, and the other end of the control switch 54 is electrically connected to the coil of the KAO relay 55. The other end of the contacts of the KAO relay 55 is electrically connected to the switching power supply 45 and one end of the contacts of the third relay. The other end of the contacts of the third relay is connected to the solenoid valve, and the coil of the third relay 51 is electrically connected to the control unit 3.

[0058] It is understandable that the control unit 3 can control the spray control module 5 according to the current paint feed pressure input by the pressure transmitter 2, thereby controlling the speed of the paint feed. In this way, the precise control of the screw rotary sprayer spraying can be further achieved, thereby improving the spraying quality.

[0059] At the same time, the control unit 3 controls the spray control module 5 through the third relay 51. Specifically, the emergency stop switch 53 is used to protect the spray control module 5; and the control switch 54 is used to control the power-on status of the coil of the KAO relay 55. When the emergency stop switch 53 and the control switch 54 are closed, the coil of the KAO relay 55 is powered on, and the contacts of the KAO relay 55 are closed. If the control unit 3 controls the coil of the third relay 51 to be powered on, the contacts of the third relay 51 are closed, so that the solenoid valve is opened and the screw rotary sprayer performs spraying. When the control unit 3 controls the coil of the third relay 51 to be de-energized, the contacts of the third relay 51 are disconnected, so that the solenoid valve is closed and the screw rotary sprayer stops spraying.

[0060] Based on the above description, Figure 3 and Figure 4 This is an electrical structure diagram of a servo control system of a screw rotary spraying machine provided in an embodiment of the present application. Figure 3 and Figure 4 As shown, the touch screen is connected to the control unit (CPU ST30) via an Ethernet port for inputting servo motor motion parameters thereto.

[0061] The output of the analog module is also connected to the input of the control unit. Specifically, the analog module includes a pressure transmitter, a cable displacement encoder, and an analog input / output module (EM AM06). The output of the cable displacement encoder and the output of the pressure transmitter are electrically connected to the two inputs of the EM AM06, respectively. The output of the EM AM06 is connected to the control unit (CPU ST30). The cable displacement encoder is used to record the motion state of the screw motor, and the pressure transmitter is used to record the paint feed pressure. The EM AM06 then feeds the motion state of the screw motor and the paint feed pressure back to the CPU ST30.

[0062] CPU ST30 includes multiple output terminals, which are connected to the screw servo driver and the rotary servo driver through the multiple output terminals. It is used to output control signals according to the servo motor motion parameters input by the touch screen and the motion state of the screw motor and the rotary motor input by EM AM06 and the feed pressure of the paint, so as to control the operation of the screw servo driver and the rotary servo driver to drive the screw motor and the rotary motor to move.

[0063] For example, CPU ST30 is connected to the screw servo drive via output port b.2. Specifically, b.2 is connected to the coil of relay KA2, and contacts KA2-0 and KA2-1 of KA2 are connected to the screw servo drive at one end and to the switching power supply at the other end. Thus, when the CPU ST30 controls the coil KA2 to be powered on, its contacts KA2-0 and KA2-1 close, the switching power supply supplies power to the screw servo drive, and the screw servo drive drives the connected screw motor to move. If the CPU ST30 controls the coil KA2 to be powered off, its contacts KA2-0 and KA2-1 open, and the screw servo drive no longer drives the connected screw motor to move.

[0064] For example, CPU ST30 is connected to the lead screw servo drive via output port b.1. Specifically, b.1 is connected to the coil of relay KA3, and contacts KA3-0 and KA3-1 of KA3 are connected to the rotary servo drive at one end and to the switching power supply at the other end. Thus, when CPU ST30 controls the coil of KA3 to be powered on, its contacts KA3-0 and KA3-1 close, the switching power supply supplies power to the rotary servo drive, and the rotary servo drive drives the connected rotary motor. If CPU ST30 controls the coil of KA2 to be powered off, its contacts KA2-0 and KA2-1 open, and the rotary servo drive no longer drives the connected rotary motor.

[0065] For example, the CPU ST30 is connected to the enable port ON1 of the screw servo drive through the output port a.4. Specifically, a.4 is connected to the coil of the relay KA6, and the contact KA6-0 of KA6 is connected to ON1. If the CPU ST30 needs to control the screw servo drive, the coil of the relay KA6 is controlled to be powered on through a.4, so that its contact KA6-0 is closed and the screw servo drive is selected. Similarly, the CPU ST30 is connected to the enable port ON2 of the rotation servo drive through the output port a.5. Specifically, a.5 is connected to the coil of the relay KA7, and the contact KA7-0 of KA7 is connected to ON2. If the CPU ST30 needs to control the rotation servo drive, the coil of the relay KA7 is controlled to be powered on through a.5, so that its contact KA7-0 is closed and the rotation servo drive is selected.

[0066] Simultaneously, CPU ST30 controls the spray control module via output port b.0. Specifically, b.0 is connected to the coil of relay KA1. The spray control module may include a three-hole socket with a switch, light, and fuse, an emergency stop switch, a control power key switch, and relay KA0. One end of the three-hole socket is connected to a 220V external voltage, while the other end is connected to one end of the emergency stop switch and one end of contacts KA0-0 and KA0-1 of relay KA0. The other end of the emergency stop switch is connected to one end of the control power key switch, which in turn is connected to the coil of relay KA0. The other ends of contacts KA0-0 and KA0-1 of relay KA0 are connected to one end of contacts KA1-0 and KA1-1, which in turn are connected to a solenoid valve. Specifically, CPU ST30 controls the coil of relay KA1 via a.5, energizing the coil, closing contacts KA1-0 and KA1-1. At the same time, if the emergency stop switch and the control power key switch are closed, the contacts KA0-0 and KA0-1 of the relay KA0 are closed. In this way, the external power supply supplies power to the solenoid valve, which opens and the spraying part begins spraying. When the CPU ST30 controls the coil of the relay KA1 and de-energizes it, its contacts KA1-0 and KA1-1 are disconnected, the solenoid valve closes, and the spraying part stops spraying.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A servo control system for a screw rotary spraying machine, characterized in that: The servo control system comprises: an input unit (1), a simulation unit (2), a control unit (3) and a drive unit (4); The output end of the input unit (1) is electrically connected to the input end of the control unit (3) and is used to input the motion parameters of the servo motor into the control unit (3); The output end of the simulation unit (2) is electrically connected to the input end of the control unit (3) and is used to collect the operating state of the servo motor and feed it back to the control unit (3); The output end of the control unit (3) is electrically connected to the input end of the drive unit (4), and the output end of the drive unit (4) is electrically connected to the servo motor for controlling the movement of the servo motor.

2. The servo control system of the screw rotary spraying machine according to claim 1, characterized in that: The drive unit (4) comprises a screw servo driver (41) and a rotary servo driver (42), wherein the input end of the screw servo driver (41) is electrically connected to the output end of the control unit (3); the input end of the rotary servo driver (42) is electrically connected to the output end of the control unit (3); the output end of the screw servo driver (41) is electrically connected to the screw motor; and the output end of the rotary servo driver (42) is electrically connected to the rotary motor.

3. The servo control system of the screw rotary spraying machine according to claim 2, characterized in that: The drive unit (4) further includes a first relay (43), a second relay (44) and a switching power supply (45); The coils of the first relay (43) and the second relay (44) are electrically connected to the control unit (3), one end of the contact of the first relay (43) is electrically connected to the lead screw servo driver (41), one end of the contact of the second relay (44) is electrically connected to the rotary servo driver (42), and the other ends of the contacts of the first relay (43) and the second relay (44) are commonly connected to one end of a switching power supply (45), and the other end of the switching power supply (45) is connected to an external power supply.

4. The servo control system of the screw rotary spraying machine according to claim 1, characterized in that: The input unit (1) is a touch screen; the input unit (1) is electrically connected to the control unit (3) via an Ethernet interface, and is used to collect input servo motor motion parameters and send them to the control unit (3).

5. The servo control system of the screw rotary spraying machine according to claim 3, characterized in that: The simulation unit (2) includes a cable displacement encoder (21) and an analog input and output module (22); The output end of the cable displacement encoder (21) is electrically connected to the input end of the analog input and output module (22), and the cable displacement encoder (21) is used to collect the motion state of the screw motor rotating motor; The analog input and output module (22) is electrically connected to the control unit (3).

6. The servo control system of the screw rotary spraying machine according to claim 5, characterized in that: It also includes a spraying control module (5), one end of which is electrically connected to the control unit (3), and the other end of which is electrically connected to the electromagnetic valve, for controlling the speed of coating feeding and feeding it back to the control unit (3).

7. The servo control system of the screw rotary spraying machine according to claim 6, characterized in that: The spray control module (5) includes a third relay (51), a connection socket (52), an emergency stop switch (53), a control switch (54) and a KAO relay (55); One end of the connection socket (52) is electrically connected to the contact of the KAO relay (55) and the emergency stop switch (53), the other end of the emergency stop switch (53) is electrically connected to the control switch (54), the other end of the control switch (54) is electrically connected to the coil of the KAO relay (55), the other end of the contact of the KAO relay (55) is electrically connected to the switch power supply (45) and one end of the contact of the third relay (51), the other end of the contact of the third relay (51) is connected to the solenoid valve, the coil of the third relay (51) is electrically connected to the control unit (3), and the connection socket (52) is externally connected to a 220V voltage.

8. The servo control system of the screw rotary spraying machine according to claim 7, characterized in that: The simulation unit (2) further comprises a pressure transmitter (23), the output end of the pressure transmitter (23) being electrically connected to the input end of the analog input and output module (22), for collecting the feed pressure of the coating and feeding it back to the control unit (3).

9. The servo control system of the screw rotary spraying machine according to claim 2, characterized in that: The drive unit (4) further includes a fourth relay (46) and a fifth relay (47), wherein: The coils of the fourth relay (46) and the fifth relay (47) are electrically connected to the control unit (3); the contact of the fourth relay (46) is electrically connected to the enable port of the lead screw servo driver (41), and the contact of the fifth relay (47) is electrically connected to the enable port of the rotary servo driver (42).

10. The servo control system of the screw rotary spraying machine according to claim 4, characterized in that: The input unit (1) is a 700-IE-V4 text display; the servo motor motion parameters include at least one or a combination of at least two of a rotation speed parameter, a feed speed parameter, a spraying start point setting parameter, and a spraying end point setting parameter.

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