Electric control full-automatic rice hulling and milling combined machine

Abstract

The utility model relates to an electric control full-automatic rice hulling and milling combined machine which comprises a feeding elevator and a stone removing machine, a discharging port in the top of the feeding elevator is connected with a feeding port of the stone removing machine, a discharging port of the stone removing machine is connected with a feeding port of a double-linkage elevator, a discharging port of the double-linkage elevator is connected with a feeding port of a rice huller, and a discharging port of the rice huller is connected with a discharging port of the rice huller. A discharging port of the rice huller is connected with a feeding port of the gravity screen, a discharging port of the gravity screen is connected with a feeding port of the rice milling machine, a discharging port of the rice milling machine is connected with a feeding port of the rice breaking screen, a first electric door device is arranged at the feeding port of the gravity screen, and the first electric door device comprises a first driving motor and an electric door. The automatic control device not only has the characteristics of simplicity in operation, accuracy in control, long service life, strong anti-interference capability and the like, but also can control the door opening range and the opening and closing degree of the gate as required, so that a user can better process rice with different moisture and different varieties.

Description

Technical Field

[0001] The utility model relates to the technical field of grain processing equipment, in particular to an electric-controlled fully automatic rice husking and milling combined rice machine. Background Art

[0002] In traditional rice mills, the driving cylinder and the pneumatic solenoid valve are connected. Users need to configure an air compressor. In the process of compressing air, the air compressor will compress the water vapor in the air into liquid water. The liquid water will pass through the pneumatic solenoid valve together with the compressed gas to reach the driving cylinder, driving the cylinder to move. After long-term use by users, the valve body of the pneumatic solenoid valve is prone to rust and the sealing parts of the pneumatic solenoid valve are aged, resulting in problems such as the driving cylinder not moving in time or not moving at all, causing the gates at the feeding ports of the rice milling machines to not be closed tightly or firmly, affecting the normal production of the rice milling machine.

[0003] The gates at the material discharge ports of each working machine are controlled by a driving cylinder and a pneumatic solenoid valve control mode, which can only realize the opening and closing functions of the gates, and cannot control the gate switch range and gate switch size according to actual processing conditions.

[0004] The working environment of a general rice mill is relatively harsh, with a lot of dust and strong electromagnetic interference. Too many pneumatic solenoid valves can easily cause a solenoid valve to jam or have poor contact due to dust interference and electromagnetic interference, affecting the normal production of the rice mill. The working machines of the rice mill adopt manual mechanical control mode, which has problems such as complex operation, difficult operation, and inaccurate control. Some users cannot master the operation process of the rice mill in a short time. Utility Model Content

[0005] In view of the above problems, the utility model provides an electrically controlled fully automatic rice husking and milling combined machine, which not only has the characteristics of simple operation, precise control, long service life, strong anti-interference ability, etc., but also can control the door opening range and gate switch size as needed, so that users can better process rice with different moisture content and different varieties.

[0006] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is as follows:

[0007] An electric-controlled fully automatic rice husking and milling combined machine comprises a feed elevator and a stone remover, wherein the discharge port on the top of the feed elevator is connected to the feed port of the stone remover, the discharge port of the stone remover is connected to the feed port of a double elevator, the discharge port of the double elevator is connected to the feed port of a rice husking machine, the discharge port of the rice husking machine is connected to the feed port of a gravity screen, the discharge port of the gravity screen is connected to the feed port of a rice milling machine, the discharge port of the rice milling machine is connected to the feed port of a broken rice screen, and a first electric door device is provided at the feed port of the gravity screen, the first electric door device comprises A first driving motor and an electric door, wherein the output shaft of the first driving motor is connected to the electric door driving shaft, the electric door is arranged on the electric door driving shaft, a limiting device is arranged on one side of the electric door, a second electric door device is arranged at the feeding port of the rice milling machine, the second electric door device comprises a feeding gate and a second driving motor, the feeding gate is connected to one end of a connecting rod, the other end of the connecting rod is connected to one end of a rack, the other end of the rack is connected to a travel switch, the rack is meshed with a gear, and the gear is connected to the driving shaft of the second driving motor.

[0008] Preferably, the limiting device comprises a limiting plate, a first electric door limiting sensor and a second electric door limiting sensor, and the first electric door limiting sensor and the second electric door limiting sensor are arranged outside the outer circumference of the limiting plate.

[0009] Preferably, the limit plate is fixedly connected to the electric door driving shaft, the first electric door limit sensor is arranged on the inner wall of the gravity screen housing, and the second electric door limit sensor is arranged on the inner wall of the gravity screen housing.

[0010] Preferably, a spring connecting shaft is provided on the electric door driving shaft, the spring connecting shaft is connected to one end of the spring, and the other end of the spring is connected to the spring fixing rod.

[0011] Preferably, the first electric door limit sensor is connected to the input end of a PLC programmable logic controller, and the second electric door limit sensor is connected to the input end of the PLC programmable logic controller.

[0012] Preferably, the travel switch includes a double-headed connecting rod, a first limit sensor, and a second limit sensor, one end of the double-headed connecting rod is connected to one end of the rack, and the other end of the double-headed connecting rod is arranged between the first limit sensor and the second limit sensor.

[0013] Preferably, the first limit sensor is connected to an input end of a PLC programmable logic controller, and the second limit sensor is connected to an input end of a PLC programmable logic controller.

[0014] Preferably, the feed gate is connected to one end of a handle screw rod, and a feed gate handle is provided at one end of the handle screw rod.

[0015] Preferably, the second drive motor is arranged on a drive motor fixing seat, the drive motor fixing seat is connected to the rice milling machine, the drive motor fixing seat includes a supporting base plate, a vertical plate and a front baffle, the front baffle is arranged on one side of the supporting base plate, and the vertical plate is arranged on the other side, and the second drive motor is installed on the vertical plate.

[0016] Preferably, the first drive motor is a servo motor, and the second drive motor is a servo motor.

[0017] The utility model has the following positive effects:

[0018] 1. The utility model performs intelligent operation on the rice processing process through the first electric door device, feed elevator, double elevator, stone remover, rice husker, gravity screen, rice mill, rice crusher and the second electric door device. It not only has the characteristics of simple operation, precise control, long service life and strong anti-interference ability, but also can control the door opening range and gate switch size as needed, so that users can better process rice with different moisture content and different varieties.

[0019] 2. The utility model controls the rice machine through a PLC logic controller, which not only enables the rice milling machine to complete the rice milling operation without human intervention during the processing, thereby effectively improving the production efficiency, but also the electric doors at the feeding port of each working machine are equipped with a separate drive motor and driver, which has stronger dust and interference resistance, so that the rice machine has the ability to be suitable for long-term use under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the mechanism of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a first electric door device of the utility model;

[0022] Figure 3 It is a structural schematic diagram of a second electric door device of the utility model;

[0023] Figure 4 It is a schematic structural diagram of the limiting device of the utility model.

[0024] Explanation of the numbers in the figure: 1-feed elevator, 2-stone remover, 3-double elevator, 4-rice husking machine, 5-rice crushing screen, 6-gravity screen, 7-rice mill, 8-first electric door device, 801-first drive motor, 802-electric door, 803-electric door drive shaft, 804-limiting device, 8041-limiting plate, 8042-first electric door limit sensor, 8043-second electric door limit sensor, 805-gravity screen housing, 806-spring connecting shaft, 807-spring, 808-spring Fixed rod, 9-second electric door device, 901-feed gate, 902-second drive motor, 903-connecting rod, 904-rack, 905-travel switch, 9051-double-headed connecting rod, 9052-first limit sensor, 9053-second limit sensor, 906-gear, 907-handle screw, 908-feed gate handle, 909-drive motor fixing seat, 9091-support base plate, 9092-vertical plate, 9093-front baffle, 10-PLC programmable logic controller. DETAILED DESCRIPTION

[0025] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0026] Example: Figure 1 or Figure 2 or Figure 3As shown, an electric-controlled fully automatic rice husking and milling combined machine comprises a feed elevator 1 and a stone remover 2, wherein the discharge port at the top of the feed elevator 1 is connected to the feed port of the stone remover 2, the discharge port of the stone remover 2 is connected to the feed port of a double elevator 3, the discharge port of the double elevator 3 is connected to the feed port of a rice husking machine 4, the discharge port of the rice husking machine 4 is connected to the feed port of a gravity screen 6, the discharge port of the gravity screen 6 is connected to the feed port of a rice milling machine 7, the discharge port of the rice milling machine 7 is connected to the feed port of a broken rice screen 5, and a first electric door device 8 is provided at the feed port of the gravity screen 6, the first electric door device 8 comprises a first drive motor 801 and an electric door 802, the first drive motor 801 is connected to the feed port of a rice milling machine 7, and the first drive motor 802 is connected to the feed port of a rice milling machine 7. The output shaft of the electric motor 801 is connected to the electric door driving shaft 803, the electric door driving shaft 803 is provided with the electric door 802, and a limit device 804 is provided on one side of the electric door 802. A second electric door device 9 is provided at the feeding port of the rice milling machine 7, and the second electric door device 9 includes a feeding gate 901 and a second driving motor 902. The feeding gate 901 is connected to one end of a connecting rod 903, and the other end of the connecting rod 903 is connected to one end of a rack 904, and the other end of the rack 904 is connected to a travel switch 905. The rack 904 is meshed with a gear 906, and the gear 906 is connected to the driving shaft of the second driving motor 902.

[0027] In this embodiment, the limiting device 804 includes a limiting plate 8041 , a first electric door limiting sensor 8042 and a second electric door limiting sensor 8043 . The first electric door limiting sensor 8042 and the second electric door limiting sensor 8043 are disposed outside the outer circumference of the limiting plate 8041 .

[0028] In this embodiment, the limit plate 8041 is fixedly connected to the electric door drive shaft 803 , the first electric door limit sensor 8042 is arranged on the inner wall of the gravity screen shell 805 , and the second electric door limit sensor 8043 is arranged on the inner wall of the gravity screen shell 805 .

[0029] In this embodiment, a spring connecting shaft 806 is provided on the electric door driving shaft 803 , and the spring connecting shaft 806 is connected to one end of a spring 807 , and the other end of the spring 807 is connected to a spring fixing rod 808 .

[0030] In this embodiment, the first electric door limit sensor 8042 is connected to the input end of the PLC programmable logic controller 10 , and the second electric door limit sensor 8043 is connected to the input end of the PLC programmable logic controller 10 .

[0031] In this embodiment, the limit device 804 is a reed switch, the first electric door limit sensor 8042 and the second electric door limit sensor 8043 are reed switches, and when the limit plate 8041 reaches the specified position as the electric door drive shaft 803 rotates, the reed switch receives the magnetic induction of the limit plate 8041 and closes, transmitting an electrical signal to the PLC programmable logic controller 10, and the PLC programmable logic controller 10 controls the rotation of the first drive motor 801, thereby controlling the closing and opening of the electric door 802.

[0032] The working principle of the reed switch is very simple. Two magnetizable reeds (usually made of iron and nickel) overlap at the ends and are sealed in a glass tube. The two reeds are overlapped and separated by a small gap (only about a few microns). The contacts on the two reeds are plated with a layer of very hard metal, usually rhodium and ruthenium. This layer of hard metal greatly increases the number of switching times and product life. The glass tube is filled with high-purity inert gas (such as nitrogen). In order to improve its high-voltage performance, some reed switches will even make the interior into a vacuum state.

[0033] The function of the reed is equivalent to a magnetic flux conductor. Before operation, the two reeds are not in contact; when the magnetic field is generated by a permanent magnet or electromagnetic coil, the external magnetic field causes different polarities near the end points of the two reeds. When the magnetic force exceeds the elastic force of the reed itself, the two reeds will attract and conduct the circuit; when the magnetic field weakens or disappears, the reeds are released due to their own elasticity, and the contact surfaces will separate to open the circuit.

[0034] In this embodiment, the travel switch 905 includes a double-headed connecting rod 9051, a first limit sensor 9052, and a second limit sensor 9053. One end of the double-headed connecting rod 9051 is connected to one end of the rack 904, and the other end of the double-headed connecting rod 9051 is arranged between the first limit sensor 9052 and the second limit sensor 9053.

[0035] In this embodiment, the first limit sensor 9052 is connected to the input end of the PLC programmable logic controller 10 , and the second limit sensor 9053 is connected to the input end of the PLC programmable logic controller 10 .

[0036] In this embodiment, the feed gate 908 is connected to one end of the handle screw 907 , and the other end of the handle screw 907 is provided with a feed gate handle 908 .

[0037] In this embodiment, the second drive motor 902 is arranged on a drive motor fixing seat 909, and the drive motor fixing seat 909 is connected to the rice milling machine 7. The drive motor fixing seat 909 includes a support bottom plate 9091, a vertical plate 9092 and a front baffle 9093. The front baffle 9093 is provided on one side of the support bottom plate 9091, and the vertical plate 9092 is provided on the other side. The second drive motor 902 is installed on the vertical plate 9092.

[0038] In this embodiment, the first driving motor 801 is a servo motor, and the second driving motor 902 is a servo motor.

[0039] The working principle of the utility model: Step S1. The rice husking and milling combined rice machine is powered on, and the user clicks the touch screen to start the machine, and the touch screen and PLC enter the self-test mode. The PLC detects the drive motor parameters and alarm status on each working machine, and the limit sensor and material sensor status corresponding to each working machine. If the status of each part is normal and there is no alarm signal, the touch screen and PLC start to control the machine to enter step S2;

[0040] Step S2. The rice enters the feed elevator, and the feed sensor in the feed hopper of the feed elevator detects the material and transmits a signal to the PLC. The PLC amplifies the signal through the intermediate relay KA3 and transmits it to the drive motors of the feed elevator and the stone remover respectively. After the drive motors of the feed elevator and the stone remover receive the start signal of the PLC, the drive motors of the feed elevator and the stone remover start to operate. After the feed elevator sends the rice to the stone remover, the machine enters step 3 (if the feed sensor in the feed hopper of the feed elevator does not detect the material, the drive motors of the feed elevator and the stone remover will not start);

[0041] Step S3. The stone remover is started. After the rice passes through the stone remover, it is discharged to the double elevator. After the feeding sensor in the double elevator feed hopper detects the rice, it transmits a signal to the PLC. The PLC amplifies the signal through the intermediate relays KA4, KA2, and KA1 and transmits it to the AC contactors KM1, KM2, KM3, KM4, and KM6 respectively. The AC contactors KM1, KM2, KM3, KM4, and KM6 receive the signal and control the double elevator, rice husker, and rice mill. The driving motor of the machine starts to run, and at the same time triggers the instruction pre-set in the PLC to delay the start of the gravity screen driving motor. The PLC delays the start of the gravity screen driving motor. The electric door from the double elevator to the gravity screen feeding port is open. After the double elevator transports the rice to the rice husker, the machine enters step S4 (the feeding sensor in the double elevator feed hopper does not detect rice, and the driving motors of the double elevator, rice husker, and rice mill are not started);

[0042] Step S4. The paddy is transported to the rice husker via the double elevator. The rice husker breaks the shell of the paddy into brown rice. At this time, the countdown of the PLC delay start of the gravity screen drive motor operation instruction ends. The PLC amplifies the signal to the AC contactor KM7 through the intermediate relay KA5. The AC contactor KM7 sends a signal and controls the operation of the gravity screen drive motor. The gravity screen starts to work. After the gravity screen drive motor starts to run, the instruction pre-set in the PLC to delay the opening of the electric door at the brown rice discharge port of the gravity screen is triggered. The PLC system starts the countdown of the delay opening of the electric door at the brown rice discharge port of the gravity screen. The double elevator transports the brown rice broken by the rice husker and some unbroken paddy to the gravity screen through the double elevator to the electric door of the gravity screen discharge port, and the machine enters step S5;

[0043] Step S5. The brown rice and some unhusked paddy enter the gravity screen. The gravity screen has multiple layers of screen surface. A material sensor is installed at the upper end of the first layer of screen surface of the gravity screen. After the material sensor senses the brown rice, it sends a signal to the PLC, triggering the delayed opening instruction of the electric door at the brown rice discharge port of the gravity screen pre-set in the PLC system. At the same time, the PLC detects the delayed opening instruction of the electric door at the brown rice discharge port of the gravity screen and starts the countdown to the end instruction. The PLC amplifies the signal through the intermediate relay KA11 and sends the signal to the driver KC3 of the electric door drive motor at the brown rice discharge port of the gravity screen. The driver KC3 receives the signal. After the signal is received, it is sent to the drive motor, the drive motor runs and drives the limit device on the motor shaft of the drive motor, and the limit sensor of the electric door at the brown rice discharge port of the gravity screen senses the limit device on the motor shaft of the drive motor, and sends a signal to the PLC, the PLC amplifies the signal through the intermediate relay KA11 and sends the signal to the driver KC3 of the electric door drive motor at the brown rice discharge port of the gravity screen, after the driver KC3 receives the signal, it sends it to the drive motor, after the drive motor receives the signal, it stops the action, the electric door at the brown rice discharge port of the gravity screen opens, the brown rice enters the brown rice bucket of the rice mill, and the machine enters step S6;

[0044] Step S6. After the electric door at the brown rice discharge port of the gravity screen is opened, the delayed opening instruction of the electric door at the brown rice hopper feed port of the rice milling machine preset in the PLC system is triggered. At the same time, after the PLC detects the countdown end instruction for delaying the opening of the electric door at the brown rice hopper feed port of the rice milling machine, the PLC amplifies the signal through the intermediate relay KA13 and transmits it to the driver KC4 of the drive motor at the brown rice hopper feed port of the rice milling machine. After receiving the signal, the driver KC4 sends it to the drive motor, and the drive motor runs and drives the gear installed on the motor shaft of the drive motor. The opening and closing of the feed door of the brown rice hopper of the rice milling machine is realized by the gear on the motor shaft of the drive motor pushing the rack connected to the brown rice hopper feed door to move back and forth. A limiting device is installed on the rack on the brown rice hopper feed door. After the moving door limit sensor senses the limit device installed on the rack, it sends a signal to the PLC. The PLC amplifies the signal through the intermediate relay KA13 and sends the signal to the driver KC4 of the drive motor at the brown rice hopper feed port. After the driver KC4 receives the signal, it sends it to the drive motor. After receiving the signal, the drive motor stops moving, and the electric door at the brown rice hopper feed port of the rice milling machine opens. The size of the electric door at the brown rice hopper feed port of the rice milling machine is determined by the parameters preset in the PLC. The PLC sends a fixed pulse signal to the intermediate relay KA13. The intermediate relay KA13 amplifies the signal to the driver KC4. The driver KC4 sends a signal to the drive motor to control the drive motor to run to the specified position so that the electric door at the brown rice hopper feed port opens to the preset size, and the brown rice enters the rice milling room. The machine enters step S7;

[0045] Step S7: the brown rice enters the whitening chamber of the rice milling machine, and is processed into standard rice through the friction of the sand roller inside the whitening chamber and the mutual squeezing of the brown rice. The standard rice is pushed by the spiral inside the rice milling machine to push the pressure plate at the discharge port of the rice milling machine. The pressure plate is lifted upward, and the standard rice is discharged through the discharge port of the rice milling machine. A material sensor is installed at the discharge port of the rice milling machine. The material sensor senses the pressure plate at the discharge port of the rice milling machine. The sensor 18 sends a signal to the PLC. The PLC receives the signal and amplifies the signal to the AC contactor KM8 through the intermediate relay KA6. The AC contactor KM8 receives the signal and controls the driving motor of the broken rice screen to start, and the broken rice screen starts to run.

[0046] To sum up, the utility model not only has the characteristics of simple operation, precise control, long service life, strong anti-interference ability, but also can control the door opening range and gate switch size as needed, so that users can better process rice with different moisture content and different varieties.

[0047] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. An electrically controlled fully automatic rice husking and milling machine, comprising a feed elevator (1) and a stone remover (2), wherein the discharge port at the top of the feed elevator (1) is connected to the feed port of the stone remover (2), the discharge port of the stone remover (2) is connected to the feed port of a double elevator (3), the discharge port of the double elevator (3) is connected to the feed port of a rice husking machine (4), the discharge port of the rice husking machine (4) is connected to the feed port of a gravity screen (6), the discharge port of the gravity screen (6) is connected to the feed port of a rice mill (7), and the discharge port of the rice mill (7) is connected to the feed port of a broken rice screen (5), characterized in that: A first electric door device (8) is provided at the feed inlet of the gravity screen (6), the first electric door device (8) comprising a first drive motor (801) and an electric door (802), the output shaft of the first drive motor (801) being connected to an electric door drive shaft (803), the electric door (802) being provided on the electric door drive shaft (803), a limiting device (804) being provided on one side of the electric door (802), and a second electric door device (904) being provided at the feed inlet of the rice mill (7). ), the second electric door device (9) comprises a feeding gate (901) and a second driving motor (902), the feeding gate (901) is connected to one end of a connecting rod (903), the other end of the connecting rod (903) is connected to one end of a rack (904), the other end of the rack (904) is connected to a travel switch (905), the rack (904) is meshedly connected to a gear (906), and the gear (906) is connected to a driving shaft of the second driving motor (902).

2. The electrically controlled fully automatic rice husking and milling combined machine according to claim 1, characterized in that: The limiting device (804) comprises a limiting plate (8041), a first electric door limiting sensor (8042) and a second electric door limiting sensor (8043); the first electric door limiting sensor (8042) and the second electric door limiting sensor (8043) are arranged outside the outer circumference of the limiting plate (8041).

3. The electrically controlled fully automatic rice husking and milling combined machine according to claim 2, characterized in that: The limit plate (8041) is fixedly connected to the electric door drive shaft (803), the first electric door limit sensor (8042) is arranged on the inner wall of the gravity screen housing (805), and the second electric door limit sensor (8043) is arranged on the inner wall of the gravity screen housing (805).

4. The electrically controlled fully automatic rice husking and milling combined machine according to claim 3 is characterized in that: A spring connecting shaft (806) is provided on the electric door driving shaft (803); the spring connecting shaft (806) is connected to one end of a spring (807); and the other end of the spring (807) is connected to a spring fixing rod (808).

5. The electrically controlled fully automatic rice husking and milling combined machine according to claim 2, characterized in that: The first electric door limit sensor (8042) is connected to an input end of a PLC programmable logic controller (10), and the second electric door limit sensor (8043) is connected to an input end of a PLC programmable logic controller (10).

6. The electrically controlled fully automatic rice husking and milling combined machine according to claim 1, characterized in that: The travel switch (905) comprises a double-ended connecting rod (9051), a first limit sensor (9052), and a second limit sensor (9053); one end of the double-ended connecting rod (9051) is connected to one end of the rack (904); and the other end of the double-ended connecting rod (9051) is arranged between the first limit sensor (9052) and the second limit sensor (9053).

7. The electrically controlled fully automatic rice husking and milling combined machine according to claim 6, characterized in that: The first limit sensor (9052) is connected to an input end of a PLC programmable logic controller (10), and the second limit sensor (9053) is connected to an input end of a PLC programmable logic controller (10).

8. The electrically controlled fully automatic rice husking and milling combined machine according to claim 1, characterized in that: The feed gate (901) is connected to one end of a handle screw (907), and the other end of the handle screw (907) is provided with a feed gate handle (908).

9. The electrically controlled fully automatic rice husking and milling combined machine according to claim 1, characterized in that: The second drive motor (902) is arranged on a drive motor fixing seat (909), the drive motor fixing seat (909) is connected to the rice mill (7), the drive motor fixing seat (909) comprises a support base plate (9091), a vertical plate (9092) and a front baffle plate (9093), one side of the support base plate (9091) is provided with the front baffle plate (9093), and the other side is provided with the vertical plate (9092), and the second drive motor (902) is mounted on the vertical plate (9092).

10. The electrically controlled fully automatic rice husking and milling combined machine according to claim 1, characterized in that: The first drive motor (801) is a servo motor, and the second drive motor (902) is a servo motor.

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