Bidirectional origin detection circuit based on printer card board

Abstract

The utility model discloses a bidirectional origin detection circuit based on a printer card board. The bidirectional origin detection circuit comprises an origin induction module, an AP2306 signal conversion circuit and a master control module. According to the utility model, the original point sensing module is used for accurately detecting the position of a machine moving trolley, the AP2306 signal conversion circuit is used for realizing compatible conversion of external and internal signal levels and intelligent control of the main control module, so that two-way transmission and processing of original point signals are realized, and especially through the design of a transistor Q7, the reliability of the original point signals is improved. Therefore, the circuit not only can detect external signal input, but also can send a control signal to an external module, thereby effectively solving the problem that a traditional one-way input mode cannot meet the requirement of a customer for taking interface multiplexing as an output function, improving the flexibility and functionality of machine origin detection, and improving the product quality. And the requirements on high precision and high efficiency in machine manufacturing and operation are met.

Description

Technical Field

[0001] The utility model relates to the technical field of inkjet printers, in particular to a bidirectional origin detection circuit based on a printer card board. Background Art

[0002] The machine origin is a fixed point on the machine, also known as the machine zero point or machine zero position. It is a physical location set by the machine manufacturer. Its function is to synchronize the machine with the system and establish the starting point for measuring the machine's motion coordinates. Most circuit designs use a unidirectional input mode. Occasionally, when a customer needs to reuse this port as an output function, this type of interface cannot be used. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the utility model provides a bidirectional origin detection circuit based on a printer card board.

[0004] The technical solution of the present utility model is achieved as follows:

[0005] A bidirectional origin detection circuit based on a printer card board includes an origin sensing module, an AP2306 signal conversion circuit and a main control module.

[0006] The origin sensing module is used to detect whether the robot's moving car has reached the predetermined origin position, and the sensor captures the physical mark or signal to trigger an electrical signal to notify the main control module of the car's position status;

[0007] The AP2306 signal conversion circuit converts the signal level of the external module into a logic level compatible with the main control module, allowing signals of different levels to be transmitted between the system and the external modules;

[0008] The main control module is used to receive the signal from the origin sensing module, identify whether the robot motion car has reached the origin, and perform corresponding control operations according to the signal, and send the control signal to the external module through the transistor Q7.

[0009] Furthermore, the AP2306 signal conversion circuit includes a transistor Q7, the source of which is respectively connected to SIG18 and one end of a resistor R125, the other end of which is respectively connected to 3V3_SYS and one end of a resistor R126, the other end of which is connected to the gate of the transistor Q7, the drain of which is connected to the second pin of the connector J2, the second pin of the connector J2 is further connected to 5V_SYS via a resistor R60, and the 5V_SYS is further connected to the first pin of the connector J2.

[0010] Further, the machine origin design of the origin detection further comprises a system board card, an origin sensor, a machine motion trolley and a trolley guide rail, the system board card is arranged at the left side of the origin sensor, the origin sensor is arranged at the top of the left side of the trolley guide rail, and the machine motion trolley is arranged to slide on the top of the trolley guide rail.

[0011] Further, the 5V_SYS is an external detection module power supply level, and the 3V3_SYS is a logic level of a board internal control unit.

[0012] Further, the resistance R126 is a current limiting resistor, the resistance R60 is an external logic pull-up resistor, the resistance R125 is an internal control unit pull-up resistor, and the transistor Q7 is a low-voltage easy-to-drive NMOS tube.

[0013] The utility model has the advantages of:

[0014] The circuit utilizes the origin sensing module to accurately detect the position of the machine motion trolley, the AP2306 signal conversion circuit realizes compatible conversion of external and internal signal levels, and the intelligent control of the main control module realizes bidirectional transmission and processing of the origin signal, especially through the design of the transistor Q7, so that the circuit can not only detect external signal input but also send control signals to external modules, effectively solving the problem that the traditional one-way input mode cannot meet the demand of customers on interface reuse as an output function, thereby improving the flexibility and functionality of machine origin detection, meeting the demand of high precision and high efficiency in machine manufacturing and operation. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 is the structural schematic diagram of the utility model;

[0016] Fig. 2 is the circuit design diagram of the utility model;

[0017] Fig. 3 is the machine origin design schematic diagram of the origin detection of the utility model.

[0018] 1-system board card; 2-origin sensor; 3-machine motion trolley; 4-trolley guide rail. DETAILED DESCRIPTION

[0019] As shown in Figs. 1-3 the utility model discloses a bidirectional origin detection circuit based on printer card plate, including origin sensing module, AP2306 signal conversion circuit and main control module,

[0020] The origin sensing module is used for detecting whether the machine motion trolley reaches the predetermined origin position, and triggers an electric signal by capturing a physical marker or signal through a sensor to inform the main control module of the position state of the trolley.

[0021] The AP2306 signal conversion circuit converts the signal level of the external module into a logic level compatible with the main control module, ensuring that signals of different levels can be correctly transmitted between the internal and external modules of the system;

[0022] Specifically, the AP2306 signal conversion circuit converts external signals into signal levels suitable for processing by the internal control unit. In this circuit, the AP2306 may be used to convert the signal level of the external detection module into a logic level that can be recognized by the main control module. Since the power supply level of the external detection module is 5V_SYS, and the logic level of the control unit inside the board is 3V3_SYS, the AP2306 circuit ensures that these two signals of different levels can be correctly converted to each other to ensure signal compatibility and reliability. In some cases, the signal conversion circuit may also provide electrical isolation to protect the main control module from external voltage or current fluctuations.

[0023] The main control module is used to receive signals from the origin sensing module, identify whether the robot motion car has reached the origin, and perform corresponding control operations based on the signal, such as stopping the car or updating the system status. It can also send control signals to external modules through transistor Q7.

[0024] Furthermore, the AP2306 signal conversion circuit includes a transistor Q7, the source of which is respectively connected to SIG18 and one end of a resistor R125, the other end of which is respectively connected to 3V3_SYS and one end of a resistor R126, the other end of which is connected to the gate of the transistor Q7, the drain of which is connected to the second pin of the connector J2, the second pin of the connector J2 is further connected to 5V_SYS via a resistor R60, and the 5V_SYS is further connected to the first pin of the connector J2.

[0025] Furthermore, the machine origin design diagram for origin detection is as follows Fig. 3 As shown, the machine origin design of the origin detection includes a system board, an origin sensor, a machine motion trolley and a trolley guide rail. The system board is arranged on the left side of the origin sensor, the origin sensor is arranged on the top left side of the trolley guide rail, and the machine motion trolley is arranged to slide on the top of the trolley guide rail.

[0026] Furthermore, the 5V_SYS is the power supply level of the external detection module, and the 3V3_SYS is the logic level of the control unit inside the board.

[0027] Furthermore, the resistor R126 is a current limiting resistor, the resistor R60 is an external logic pull-up resistor, the resistor R125 is an internal control unit pull-up resistor, and the transistor Q7 is a low-voltage, easy-to-drive NMOS tube.

[0028] Working principle:

[0029] The circuit adopts the OD output mode, and the low level is effective. Due to the existence of the pull-up resistor, the S pin of the NMOS is 3.3V and the D pin is 5V under normal circumstances. The IO port of the external module is connected to the D pin of the NMOS. When the signal is detected, the IO port is set to low. At this time, the SIG18 level of the internal control unit is clamped to low through the internal diode of the NMOS, and the signal transmission process from the external module to the internal control unit is completed.

[0030] When the control unit transmits a signal to the external module, the SIG18 is set to low. At this time, the Ugs voltage of the NMOS is greater than the opening voltage, and the D pin and the S pin are low. The IO port of the external module is pulled low, and the signal transmission process from the internal control unit to the external module is completed. Through the principle, the circuit can be used as an input signal at the same time, and can also be set as an output signal when needed.

[0031] In the default state, the signal of the original point input is high. When the machine trolley returns to the original position, the original point sensor will be triggered. At this time, the low level input will be triggered. At this time, the system main control will detect the low level, indicating that the trolley has returned to the original point. The system main control module will perform the next control operation according to the received original point position signal.

[0032] The utility model is used for digital inkjet printer, is used for the design of machine trolley original point position induction. The bidirectional original point detection circuit based on printer card plate detects whether the machine movement trolley reaches the original point position through the original point sensing module, realizes the level compatibility and signal conversion between the external detection module and the internal control unit of the board by utilizing AP2306 signal conversion circuit, and processes and responds to the signal through the main control module, realizes an efficient, flexible bidirectional communication system which can detect the original point position as an input signal and control the machine movement as an output signal.

Claims

1. A bidirectional origin detection circuit based on a printer card, characterized in that: Including origin sensing module, AP2306 signal conversion circuit and main control module, The origin sensing module is used to detect whether the robot's moving car has reached the predetermined origin position, and the sensor captures the physical mark or signal to trigger an electrical signal to notify the main control module of the car's position status; The AP2306 signal conversion circuit converts the signal level of the external module into a logic level compatible with the main control module, allowing signals of different levels to be transmitted between the system and the external modules; The main control module is used to receive the signal from the origin sensing module, identify whether the robot motion car has reached the origin, and perform corresponding control operations according to the signal, and send the control signal to the external module through the transistor Q7.

2. The bidirectional origin detection circuit based on a printer card board according to claim 1, characterized in that: The AP2306 signal conversion circuit includes a transistor Q7, the source of which is connected to SIG18 and one end of a resistor R125, respectively. The other end of the resistor R125 is connected to 3V3_SYS and one end of a resistor R126, respectively. The other end of the resistor R126 is connected to the gate of the transistor Q7. The drain of the transistor Q7 is connected to the second pin of the connector J2. The second pin of the connector J2 is also connected to 5V_SYS through a resistor R60. The 5V_SYS is also connected to the first pin of the connector J2.

3. The bidirectional origin detection circuit based on a printer card board according to claim 1, characterized in that: It also includes a machine origin design for origin detection, which includes a system board, an origin sensor, a machine motion trolley and a trolley guide rail. The system board is arranged on the left side of the origin sensor, the origin sensor is arranged on the left top of the trolley guide rail, and the machine motion trolley is arranged on the top of the trolley guide rail to slide.

4. The bidirectional origin detection circuit based on a printer card board according to claim 2, characterized in that: The 5V_SYS is the power supply level of the external detection module, and the 3V3_SYS is the logic level of the control unit inside the board.

5. The bidirectional origin detection circuit based on a printer card board according to claim 2, characterized in that: The resistor R126 is a current limiting resistor, the resistor R60 is an external logic pull-up resistor, the resistor R125 is an internal control unit pull-up resistor, and the transistor Q7 is a low-voltage, easy-to-drive NMOS transistor.

Images