Electric turntable control system and its control method

Abstract

The present invention discloses an electric turntable control system, comprising a first proximity switch, a second proximity switch, a main control, and a stepper motor control chip for controlling the operation of a stepper motor; the first proximity switch, the second proximity switch, and the stepper motor control chip are all connected to the main control signal; sensing positions are arranged at intervals in the circumference of the turntable, and the sensing positions include trigger positions and non-trigger positions, and the intervals between each trigger position and each non-trigger position are equal and alternately arranged; the first proximity switch and the second proximity switch are arranged in sequence along the clockwise rotation direction of the turntable, and the first proximity switch and the second proximity switch are spaced apart by one sensing position. The present invention mainly solves a series of problems existing in the motor control technology of the electric turntable; through the cooperation of the sensor with the trigger position and the non-trigger position, the start and stop, forward and reverse rotation, and acceleration and deceleration functions of the electric turntable can be realized, and its functions are perfect, and no external control mechanism such as a remote controller and a hardware switch is required, which is conducive to cleaning.

Description

Technical Field

[0001] The present invention relates to the field of electromechanical control technology, and in particular to an electric turntable control system and a control method thereof. Background Art

[0002] At present, many high-end dining tables use electric turntables. Common electric turntables include a turntable and a motor. The turntable is driven to rotate by the motor. There are three main motor control methods for the electric turntable:

[0003] 1. Use hardware switch control: close the switch to energize the motor, and the turntable will rotate; open the switch to cut off the power to the motor, and the turntable will stop rotating;

[0004] 2. Sensor control: Use infrared sensors or capacitive sensors to detect the state of the turntable. When the motor stops, the operator moves the turntable to make the sensor send a signal, and the main control controls the motor to start rotating. When the motor is running, the operator presses the turntable to make the sensor send a signal, and the main control controls the motor to stop rotating.

[0005] 3. Control by remote control: Use the remote control to send various signals to the main control, and the main control then controls the motor to operate accordingly, such as starting and stopping the motor, forward and reverse rotation, and acceleration and deceleration.

[0006] The above three motor control methods all have their disadvantages: when using hardware switch control, a switch needs to be installed on the dining table, which affects the appearance of the dining table, is not conducive to cleaning, and has relatively simple functions; when using sensor control, the function is still relatively simple; when using remote control control, the remote control needs to replace the battery from time to time, and the remote control is easy to lose.

[0007] In summary, there is an urgent need for an electric turntable control system and a control method thereof to solve a series of problems existing in the motor control technology of the electric turntable in the prior art. Summary of the invention

[0008] One of the purposes of the present invention is to provide an electric turntable control system, which enables the electric turntable to realize the start and stop, forward and reverse rotation, and acceleration and deceleration functions.

[0009] Another object of the present invention is to provide an electric turntable control method, which is used in conjunction with an electric turntable control system to enable the electric turntable to achieve start and stop, forward and reverse rotation, and acceleration and deceleration functions.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric turntable control system, applied to an electric turntable, the electric turntable includes a turntable and a stepper motor, the turntable is driven by the stepper motor and can rotate in a clockwise or counterclockwise direction, including a first proximity switch, a second proximity switch, a main control and a stepper motor control chip for controlling the operation of the stepper motor; the first proximity switch, the second proximity switch and the stepper motor control chip are all connected to the main control signal; the turntable is circumferentially spaced with sensing positions, the sensing positions include trigger positions and non-trigger positions, and the intervals between each trigger position and each non-trigger position are equal and alternately arranged; the first proximity switch and the second proximity switch are sequentially arranged along the clockwise rotation direction of the turntable, and the first proximity switch and the second proximity switch are spaced apart by one sensing position.

[0011] In the above technical solution, the main control is a micro control unit.

[0012] In the above technical solution, both the first proximity switch and the second proximity switch are signal-connected to the general input / output pin of the master control.

[0013] In the above technical solution, the ENN pin, STEP pin and DIR pin of the stepper motor control chip are all connected to the general input / output pin signal of the main control.

[0014] In the above technical scheme, the OA1 pin of the stepper motor control chip is connected to the port 1 of the winding A of the stepper motor, the OA2 pin of the stepper motor control chip is connected to the port 2 of the winding A of the stepper motor, the OB1 pin of the stepper motor control chip is connected to the port 1 of the winding B of the stepper motor, and the OB2 pin of the stepper motor control chip is connected to the port 2 of the winding B of the stepper motor.

[0015] In the above technical solution, the electric turntable control system also includes a power supply module for supplying power to the main control and the stepper motor control chip.

[0016] An electric turntable control method, which applies the above electric turntable control system, comprises the following steps:

[0017] S1, the main control detects whether the first proximity switch and the second proximity switch send out a trigger signal at the same time; if so, execute step S2; if not, turn off the stepper motor;

[0018] S2, the main control detects the signals sent by the first proximity switch and the second proximity switch; if the first proximity switch sends a trigger signal and the second proximity switch sends a non-trigger signal, the stepper motor is controlled to drive the turntable to rotate counterclockwise; if the second proximity switch sends a trigger signal and the first proximity switch sends a non-trigger signal, the stepper motor is controlled to drive the turntable to rotate clockwise;

[0019] S3. Continue to execute step S1.

[0020] In the above technical solution, after step S2, it also includes: when the stepper motor is driving the turntable to rotate counterclockwise, if the first proximity switch accelerates to send a trigger signal, and the second proximity switch accelerates to send a non-trigger signal, the stepper motor is controlled to rotate counterclockwise at an accelerated speed; when the stepper motor is driving the turntable to rotate clockwise, if the second proximity switch accelerates to send a trigger signal, and the first proximity switch accelerates to send a non-trigger signal, the stepper motor is controlled to rotate clockwise at an accelerated speed.

[0021] In the above technical solution, each time the operating state of the stepper motor changes, the changed operating state of the stepper motor is saved in the memory of the main control; when the main control is turned on, the stepper motor is driven to operate with the operating state saved in the memory.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. In this electric turntable control system, the sensing position includes a trigger position and a non-trigger position. The intervals between each trigger position and each non-trigger position are equal and are alternately arranged. The first proximity switch and the second proximity switch are arranged in sequence along the clockwise rotation direction of the turntable, and the first proximity switch and the second proximity switch are spaced apart by one sensing position. By coordinating the sensor with the trigger position and the non-trigger position, the start and stop, forward and reverse rotation, and acceleration and deceleration functions of the electric turntable can be realized. The function is complete and no external control mechanism such as a remote control and a hardware switch is required, which is conducive to cleaning.

[0024] 2. This electric turntable control method can realize the start and stop, forward and reverse rotation, and acceleration and deceleration functions of the electric turntable by detecting the signals of the first proximity switch and the second proximity switch. It has complete functions and does not require any external control mechanisms such as remote controls and hardware switches, which is conducive to cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a three-dimensional view of an electric turntable to which the present invention is applied.

[0026] Figure 2 The exploded view of the electric turntable to which the present invention is applied.

[0027] Figure 3This is a three-dimensional view of the electric turntable of the present invention without the turntable.

[0028] Figure 4 for Figure 3 A is a partial enlarged view of the figure.

[0029] Figure 5 The schematic diagram of the circuit of the electric turntable control system in the present invention.

[0030] Figure 6 It is a partial circuit schematic diagram of the main control in the present invention.

[0031] Figure 7 It is a partial circuit schematic diagram of the stepper motor control chip in the present invention.

[0032] Figure 8 It is a partial circuit schematic diagram of the power supply module in the present invention.

[0033] Fig. 9 It is a schematic diagram of the electric turntable of the present invention when rotating counterclockwise.

[0034] Fig.10 It is a schematic diagram of the electric turntable of the present invention when rotating clockwise.

[0035] The accompanying drawings are marked as follows: 1, turntable; 2, stepper motor; 3, transmission ring; 4, bearing; 5, gear; 6, first proximity switch; 7, second proximity switch; 8, induction ring; 81, rib; 82, groove; 91, trigger position; 92, non-trigger position. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 4The present invention provides an electric turntable control system, which is applied to an electric turntable. The electric turntable includes a turntable 1 and a stepper motor 2. The turntable 1 is driven by the stepper motor 2 and can rotate in a clockwise or counterclockwise direction. A transmission ring 3 with internal teeth is fixed to the bottom surface of the turntable 1. The transmission ring 3 is coaxial with the turntable 1. The transmission ring 3 is supported on a plane through a bearing 4. The stepper motor 2 is arranged in the inner ring of the transmission ring 3. The rotating shaft of the stepper motor 2 is sleeved with a gear 5. The gear 5 is transmitted between the gear 5 of the stepper motor 2 and the transmission ring 3 of the turntable 1 through another gear 5, thereby driving the turntable 1 to rotate. In some other possible embodiments, the stepper motor 2 drives the turntable 1 to rotate through a reducer, that is, the rotating shaft of the stepper motor 2 is connected to the reducer, and the rotation center of the turntable 1 is set on the output shaft of the reducer. In some other possible embodiments, the turntable 1 is supported on a plane through a bearing 4, and a transmission wheel is respectively arranged at the rotating shaft of the stepper motor 2 and the rotation center of the turntable 1. The transmission is transmitted between the two transmission wheels through a belt or a synchronous belt, thereby driving the turntable 1 to rotate.

[0038] See also Figure 5-Figure 7 The electric turntable control system includes a first proximity switch 6, a second proximity switch 7, a main control IC1 and a stepper motor control chip U1 for controlling the operation of the stepper motor 2; the first proximity switch 6, the second proximity switch 7 and the stepper motor control chip U1 are all connected to the main control IC1 signal.

[0039] The first proximity switch 6 and the second proximity switch 7 are both photoelectric proximity switches. When an object approaches in front of the sensing heads of the first proximity switch 6 and the second proximity switch 7, the first proximity switch 6 and the second proximity switch 7 can be triggered. In this embodiment, after the first proximity switch 6 and the second proximity switch 7 are triggered, their signal output ends send out a pulse.

[0040] The turntable 1 is provided with sensing positions at intervals in the circumferential direction, and the sensing positions include a trigger position 91 and a non-trigger position 92, and the intervals between each trigger position 91 and each non-trigger position 92 are equal and arranged alternately; the first proximity switch 6 and the second proximity switch 7 are arranged in sequence along the clockwise rotation direction of the turntable 1, and the first proximity switch 6 and the second proximity switch 7 are spaced apart by one sensing position; in this embodiment, an induction ring 8 is fixed under the turntable 1, and the induction ring 8 is fixed under the turntable 1 by screws, the induction ring 8 is coaxial with the turntable 1, and the induction ring 8 is fixed with the transmission ring 3, so as to realize the fixation of the turntable 1 and the transmission ring 3, and when the stepper motor 2 drives the transmission ring 3 to rotate, the induction ring 8 and the turntable 1 also rotate coaxially with the transmission ring 3; the induction ring 8 is fixed under the turntable 1 by screws, and ... fixed with the A rib 81 and a groove 82 are axially arranged on the ring 8. The rib 81 and the groove 82 are of equal width and are alternately arranged. The first proximity switch 6 and the second proximity switch 7 are arranged along the clockwise rotation direction of the turntable 1. The rib 81 can trigger the first proximity switch 6 and the second proximity switch 7, that is, corresponding to the trigger position 91, and the groove 82 cannot trigger the first proximity switch 6 and the second proximity switch 7, that is, corresponding to the non-trigger position 92. The first proximity switch 6 and the second proximity switch 7 are separated by a width of a rib 81 or a groove 82, that is, the first proximity switch 6 and the second proximity switch 7 are separated by a sensing position; in this embodiment, the first proximity switch 6 and the second proximity switch 7 are fixed on the plane of the support bearing 4 by a bracket.

[0041] The main control IC1 is a microcontroller unit (MCU). In this embodiment, the main control IC1 is a single-chip microcomputer of model 15W408, whose pins 1-5, pin 7, and pins 9-16 are all general input / output pins, pin 6 is a VCC pin, and pin 8 is a GND pin. The main control IC1 is mounted on a printed circuit board (PCB), and a connector is provided on the printed circuit board by welding, so that the main control IC1 can be respectively connected to the first proximity switch 6, the second proximity switch 7 and the stepper motor control chip U1 signal.

[0042] The model of the stepper motor control chip U1 is TMC2208 QFN28. The stepper motor control chip U1 is mounted on another printed circuit board (PCB). A connector is provided on the printed circuit board by welding to connect the stepper motor control chip U1 to the main control IC1 signal and to electrically connect to the stepper motor 2. Some pins of the stepper motor control chip U1 are defined as follows:

[0043] Pin 1: OB2, port 2 output port of winding B of the stepper motor;

[0044] Pin 2: ENN, stepper motor enable port. When this port is high, the stepper motor is set to floating;

[0045] Pin 16: STEP, step signal input port;

[0046] Pin 19: DIR, direction signal input port;

[0047] Pin 21: OA2, port 2 output port of winding A of the stepper motor;

[0048] Pin 24: OA1, port 1 output port of winding A of the stepper motor;

[0049] Pin 26: OB1, Port 1 output port of winding B of the stepper motor.

[0050] The first proximity switch 6 and the second proximity switch 7 are both connected to the general input / output pin signal of the main control IC1. Specifically, the signal output ends of the first proximity switch 6 and the second proximity switch 7 are connected to the connector of the printed circuit board equipped with the main control IC1, and are respectively connected to the pin 2 and the pin 1 of the main control IC1 through the printed circuit on the printed circuit board, so that the pin 2 and the pin 1 of the main control IC1 can respectively receive the pulses of the first proximity switch 6 and the second proximity switch 7.

[0051] The ENN pin, STEP pin and DIR pin of the stepper motor control chip U1 are all connected to the general input / output pin signals of the main control IC1. Specifically, the connector of the printed circuit board equipped with the main control IC1 is connected to the connector of the printed circuit board equipped with the stepper motor control chip U1 through a wire or a cable, and through the printed circuits on the two printed circuit boards, the pin 2 (ENN pin) of the stepper motor control chip U1 is connected to the pin 13 of the main control IC1, the pin 16 (STEP pin) of the stepper motor control chip U1 is connected to the pin 7 of the main control IC1, and the pin 19 (DIR pin) of the stepper motor control chip U1 is connected to the pin 5 of the main control IC1.

[0052] The OA1 pin of the stepper motor control chip U1 is connected to the port 1 of the winding A of the stepper motor 2, the OA2 pin of the stepper motor control chip U1 is connected to the port 2 of the winding A of the stepper motor 2, the OB1 pin of the stepper motor control chip U1 is connected to the port 1 of the winding B of the stepper motor 2, and the OB2 pin of the stepper motor control chip U1 is connected to the port 2 of the winding B of the stepper motor 2. Specifically, the above four winding ports of the stepper motor 2 are connected to the connector P1 of the printed circuit board equipped with the stepper motor control chip U1 through wires, and through the printed circuit on the printed circuit board, the pin 1, pin 21, pin 24 and pin 26 of the stepper motor control chip U1 are respectively connected to the above four winding ports of the stepper motor 2, so that the stepper motor control chip U1 can drive and control the operation of the stepper motor 2.

[0053] See also Figure 8 Furthermore, the electric turntable control system also includes a power supply module for supplying power to the main control IC1 and the stepper motor control chip U1; in this embodiment, the power supply module includes a voltage stabilizing chip IC2, the model of the voltage stabilizing chip IC2 is HT7550, and the DC 12V voltage port is connected to the Vin pin of the voltage stabilizing chip IC2 after passing through a diode D1 and a resistor R7 in series and capacitors C15, C18 and C9 in parallel, and the Vout pin of the voltage stabilizing chip IC2 is connected to the VCC network to provide a stabilized 5V DC power supply, thereby supplying power to the main control IC1 and the stepper motor control chip U1; the power supply module and the main control IC1 are mounted on the same printed circuit board, and the main control IC1 is supplied with power through the printed circuit, and after being connected to the printed circuit board equipped with the stepper motor control chip U1 through a connector and a wire, it supplies power to the stepper motor control chip U1.

[0054] See also Fig. 9 and Fig.10 The present invention also provides an electric turntable control method, which uses the above-mentioned electric turntable control system and includes the following steps:

[0055] S1, the main control IC1 detects whether the first proximity switch 6 and the second proximity switch 7 send out trigger signals at the same time; if so, execute step S2; if not, turn off the stepper motor 2.

[0056] If the turntable 1 is rotating, it will inevitably rotate to the position of triggering the first proximity switch 6 and the second proximity switch 7 at the same time. At this time, the first proximity switch 6 and the second proximity switch 7 simultaneously send pulses to the main control IC1; if the turntable 1 is pressed by a person's hand and cannot rotate, the first proximity switch 6 and the second proximity switch 7 cannot be triggered at the same time. At this time, the pin 13 of the main control IC1 remains at a high level output, that is, the ENN pin of the stepper motor control chip U1 remains at a high level, and the stepper motor 2 is set to float, that is, it is stopped; even if the turntable 1 has reached the position of triggering the first proximity switch 6 and the second proximity switch 7 at the same time, it can only make the first proximity switch 6 and the second proximity switch 7 send a pulse at the same time. The main control IC1 does not detect the next pulse of the first proximity switch 6 and the second proximity switch 7 within a period of time. At this time, the pin 13 of the main control IC1 will also remain at a high level output, that is, the ENN pin of the stepper motor control chip U1 remains at a high level, and the stepper motor 2 is set to float, that is, it is stopped.

[0057] With this step, it can be achieved that: when the turntable 1 is rotating, if it is pressed by a hand, the stepper motor 2 is turned off, thereby stopping the rotation of the turntable 1.

[0058] S2, the main control IC1 detects the signals sent by the first proximity switch 6 and the second proximity switch 7; if the first proximity switch 6 sends a trigger signal and the second proximity switch 7 sends a non-trigger signal, the stepper motor 2 is controlled to drive the turntable 1 to rotate counterclockwise; if the second proximity switch 7 sends a trigger signal and the first proximity switch 6 sends a non-trigger signal, the stepper motor 2 is controlled to drive the turntable 1 to rotate clockwise.

[0059] If the first proximity switch 6 and the second proximity switch 7 are triggered at the same time and send out a pulse signal, and then the first proximity switch 6 is triggered again and sends out a pulse signal, and the second proximity switch 7 is not triggered and remains silent, it indicates that the turntable 1 is rotating counterclockwise. At this time, pin 19 of the main control IC1 maintains a certain level, so that the DIR pin of the stepper motor control chip U1 remains at this level, so that the stepper motor 2 runs in the direction of driving the turntable 1 to rotate counterclockwise, and pin 16 of the main control IC1 continues to send pulses, so that the STEP pin of the stepper motor control chip U1 continues to receive pulse signals, thereby keeping the stepper motor 2 running.

[0060] If the first proximity switch 6 and the second proximity switch 7 are triggered at the same time and send out a pulse signal, and then the first proximity switch 6 is not triggered and remains silent, and the second proximity switch 7 is triggered again and sends out a pulse signal, it indicates that the turntable 1 is rotating clockwise. At this time, pin 19 of the main control IC1 maintains another electrical level, so that the DIR pin of the stepper motor control chip U1 remains at this level, so that the stepper motor 2 runs in the direction of driving the turntable 1 to rotate clockwise, and pin 16 of the main control IC1 continues to send pulses, so that the STEP pin of the stepper motor control chip U1 continues to receive pulse signals, thereby keeping the stepper motor 2 running.

[0061] With this step, it is possible to achieve:

[0062] 1. When the turntable 1 is stationary, if it is pushed by a hand, the turntable 1 will rotate in the direction pushed by the hand;

[0063] 2. When the turntable 1 is rotating, if it is pushed in the opposite direction by a hand, the turntable 1 will rotate in the direction pushed by the hand.

[0064] S3. Continue to execute step S1.

[0065] Continuing to execute step S1, the main control IC1 continuously detects whether the first proximity switch 6 and the second proximity switch 7 send out trigger signals at the same time, thereby realizing the continuous operation or stop of the turntable 1 according to step S1 and step S2.

[0066] Furthermore, after step S2, the method further includes:

[0067] When the stepper motor 2 is driving the turntable 1 to rotate counterclockwise, if the first proximity switch 6 accelerates to send a trigger signal and the second proximity switch 7 accelerates to send a non-trigger signal, the stepper motor 2 is controlled to rotate counterclockwise at an accelerated speed.

[0068] When the stepper motor 2 is driving the turntable 1 to rotate counterclockwise, the main control IC1 records the time intervals between the first proximity switch 6 sending out a pulse signal and the second proximity switch 7 remaining silent twice. If the subsequent time interval between the first proximity switch 6 sending out a pulse signal and the second proximity switch 7 remaining silent is shortened to half or less of the previous time interval, it indicates that the turntable 1 is being accelerated by a person. At this time, the pin 16 of the main control IC1 speeds up the pulse sending, causing the STEP pin of the stepper motor control chip U1 to speed up the reception of the pulse signal, thereby driving the stepper motor 2 to rotate faster, and then causing the turntable 1 to rotate faster.

[0069] When the stepper motor 2 is driving the turntable 1 to rotate clockwise, if the second proximity switch 7 accelerates to send a trigger signal and the first proximity switch 6 accelerates to send a non-trigger signal, the stepper motor 2 is controlled to rotate clockwise at an accelerated speed.

[0070] When the stepper motor 2 is driving the turntable 1 to rotate clockwise, the main control IC1 records the time intervals between the second proximity switch 7 sending out pulse signals and the first proximity switch 6 remaining silent twice. If the subsequent time interval between the second proximity switch 7 sending out pulse signals and the first proximity switch 6 remaining silent is shortened to half or less of the previous time interval, it indicates that the turntable 1 is being accelerated by hand. At this time, the pin 16 of the main control IC1 speeds up the pulse sending, so that the STEP pin of the stepper motor control chip U1 speeds up the reception of the pulse signal, thereby driving the stepper motor 2 to rotate faster, and then accelerating the rotation of the turntable 1.

[0071] Furthermore, each time the operating state of the stepper motor 2 changes, the changed operating state of the stepper motor 2 is saved in the memory of the main control IC1; when the main control IC1 is turned on, the stepper motor 2 is driven to operate with the operating state saved in the memory; at the same time, the main control IC1 can also be enabled to know the current operating state of the stepper motor 2; in this embodiment, the memory is the EPROM built into the main control IC1, and the operating state is the operating direction and speed of the stepper motor 2.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric turntable control system, applied to an electric turntable, the electric turntable comprises a turntable and a stepper motor, the turntable is driven by the stepper motor and can rotate in a clockwise or counterclockwise direction, a transmission ring with internal teeth is fixed to the bottom surface of the turntable, the transmission ring is coaxial with the turntable, the transmission ring is supported on a plane by a bearing, the stepper motor is arranged in the inner ring of the transmission ring, the rotating shaft sleeve of the stepper motor is provided with a gear, and another gear is used to transmit the power between the gear of the stepper motor and the transmission ring of the turntable, thereby driving the turntable to rotate, characterized in that: The invention comprises a first proximity switch, a second proximity switch, a main control, and a stepper motor control chip for controlling the operation of the stepper motor; the first proximity switch, the second proximity switch, and the stepper motor control chip are all connected to the main control signal, the first proximity switch and the second proximity switch are both photoelectric proximity switches, and when an object approaches in front of the sensing head of the first proximity switch and the second proximity switch, the first proximity switch and the second proximity switch can be triggered, and after the first proximity switch and the second proximity switch are triggered, their signal output ends send out a pulse; The turntable is provided with sensing positions at intervals in the circumferential direction, and the sensing positions include triggering positions and non-triggering positions, and the intervals between each triggering position and each non-triggering position are equal and arranged alternately; the first proximity switch and the second proximity switch are arranged in sequence along the clockwise rotation direction of the turntable, and the first proximity switch and the second proximity switch are spaced apart by one sensing position, an induction ring is fixed under the turntable, the induction ring is fixed under the turntable by screws, the induction ring is coaxial with the turntable, and the induction ring is fixed to the transmission ring, thereby realizing the fixation of the turntable and the transmission ring, and when the stepping motor drives the transmission ring to rotate, the induction ring The ring and the turntable also rotate coaxially with the transmission ring; the induction ring is axially provided with ribs and grooves, the ribs and the grooves are of equal width and are alternately arranged, the first proximity switch and the second proximity switch are arranged along the clockwise rotation direction of the turntable, the ribs can trigger the first proximity switch and the second proximity switch, that is, corresponding to the trigger position, the grooves cannot trigger the first proximity switch and the second proximity switch, that is, corresponding to the non-trigger position, the first proximity switch and the second proximity switch are separated by a width of the rib or the groove, that is, the first proximity switch and the second proximity switch are separated by a sensing position.

2. The electric turntable control system according to claim 1, characterized in that: The main control is a micro control unit.

3. The electric turntable control system according to claim 2, characterized in that: The first proximity switch and the second proximity switch are both signal-connected to a general input / output pin of the master control.

4. The electric turntable control system according to claim 2, characterized in that: The ENN pin, STEP pin and DIR pin of the stepper motor control chip are all connected to the general input / output pin signal of the main control.

5. The electric turntable control system according to claim 1, 2 or 4, characterized in that: The OA1 pin of the stepper motor control chip is connected to the port 1 of the winding A of the stepper motor, the OA2 pin of the stepper motor control chip is connected to the port 2 of the winding A of the stepper motor, the OB1 pin of the stepper motor control chip is connected to the port 1 of the winding B of the stepper motor, and the OB2 pin of the stepper motor control chip is connected to the port 2 of the winding B of the stepper motor.

6. The electric turntable control system according to claim 1, characterized in that: It also includes a power supply module for supplying power to the main control and the stepper motor control chip.

7. An electric turntable control method, using the electric turntable control system according to any one of claims 1 to 6, characterized in that: The steps include: S1, the main control detects whether the first proximity switch and the second proximity switch send out a trigger signal at the same time; if so, execute step S2; if not, turn off the stepper motor; S2, the main control detects the signals sent by the first proximity switch and the second proximity switch; if the first proximity switch sends a trigger signal and the second proximity switch sends a non-trigger signal, the stepper motor is controlled to drive the turntable to rotate counterclockwise; if the second proximity switch sends a trigger signal and the first proximity switch sends a non-trigger signal, the stepper motor is controlled to drive the turntable to rotate clockwise; S3. Continue to execute step S1.

8. The electric turntable control method according to claim 7, characterized in that: After step S2, the method further includes: When the stepper motor is driving the turntable to rotate counterclockwise, if the first proximity switch accelerates to send a trigger signal and the second proximity switch accelerates to send a non-trigger signal, the stepper motor is controlled to rotate counterclockwise at an accelerated speed; When the stepper motor is driving the turntable to rotate clockwise, if the second proximity switch accelerates to send a trigger signal and the first proximity switch accelerates to send a non-trigger signal, the stepper motor is controlled to rotate clockwise.

9. The electric turntable control method according to claim 7 or 8, characterized in that: Each time the running state of the stepper motor changes, the changed running state of the stepper motor is saved in the memory of the main control; When the main control is turned on, the stepper motor is driven to operate according to the operating state stored in the memory.

Images