A filter circuit for laser direct writing equipment

Abstract

This utility model discloses a filtering circuit for a laser direct-writing device, comprising: a terminal block, a first motor, a starting capacitor, a first switching power supply, a laser assembly, an oscilloscope, a second switching power supply, a second motor, and a solenoid valve; it also includes a first resistor, a first capacitor, an isolation transformer, a second resistor, and a second capacitor; one end of the first capacitor is connected to the first switching power supply, and the other end is connected to one end of the first capacitor, with the other end of the first capacitor connected to the second motor; one end of the second capacitor is connected to the second switching power supply, and the other end is connected to one end of the second capacitor, with the other end of the second capacitor connected to the solenoid valve; the third power supply of the plurality of power supplies is powered by the isolation transformer, which is connected to the first motor. This filtering circuit stabilizes the voltage of the laser's control pins, protecting the laser.

Description

Technical Field

[0001] This utility model belongs to the field of laser direct writing technology, and in particular relates to a filter circuit for laser direct writing equipment. Background Technology

[0002] refer to Figure 1 and Figure 2 The electrical components of the laser direct writing device include: a laser assembly 20, including a driver board 21, and several control pins 22 disposed on the driver board 21, each control pin 22 being connected to a separate laser 23. The electrical components of the laser direct writing device also include several motors: for example, a first motor 13 driving the roller shutter door to move up and down, a second motor 17 driving the laser assembly 20 to move horizontally on the upper crossbeam, and a solenoid valve 16. It should be noted that the first motor 13 and the second motor 17 are only two of the motors in the laser direct writing device; the laser direct writing device also includes other motors.

[0003] The applicant discovered that when one or more motors (e.g., the first motor 13 and / or the second motor 17) of the laser direct writing device are started or stopped, or when the solenoid valve 16 is started or stopped, a short-term voltage surge occurs in the voltage waveform of the laser control pin 22, which not only affects the exposure quality of the laser, but also damages the laser 23. Utility Model Content

[0004] This invention provides a filtering circuit for a laser direct writing device, the purpose of which is to eliminate the impact of electromagnetic interference generated when the motor and / or solenoid valve start and stop in the laser direct writing device on the voltage of the laser control pin.

[0005] The solution of this utility model is as follows:

[0006] A filter circuit for a laser direct writing device includes: a terminal block, a first motor, a starting capacitor, a first switching power supply, a laser assembly, an oscilloscope, a second switching power supply, a second motor, and a solenoid valve;

[0007] The terminal block divides the mains power into several power supply paths. The first power supply path of the several power supply paths supplies power to the laser assembly through the first switching power supply. The laser assembly is electrically connected to the oscilloscope.

[0008] The second power supply of the plurality of power supply channels supplies power to the second motor through the second switching power supply.

[0009] The second switching power supply supplies power to the solenoid valve;

[0010] It also includes a first resistor, a first capacitor, an isolation transformer, a second resistor, and a second capacitor; one end of the first capacitor is connected to the first switching power supply, and the other end is connected to one end of the first capacitor, and the other end of the first capacitor is connected to the second motor; one end of the second capacitor is connected to the second switching power supply, and the other end is connected to one end of the second capacitor, and the other end of the second capacitor is connected to the solenoid valve; the third power supply of the plurality of power supplies supplies power the isolation transformer, and the isolation transformer is connected to the first motor.

[0011] Furthermore, the first motor is a DC motor.

[0012] Furthermore, the second motor is an AC motor.

[0013] The beneficial technical effects of this utility model are as follows: By connecting a first resistor R1 and a first capacitor C1 in series between the second switching power supply and the second motor, voltage interference to the control pin of the laser is eliminated when the second motor starts and stops, effectively protecting the laser; by connecting a second resistor R2 and a second capacitor C2 in series between the second switching power supply and the solenoid valve, voltage interference to the control pin of the laser is eliminated when the solenoid valve starts and stops, effectively protecting the laser; by connecting an isolation transformer between the first motor and the terminal block, voltage interference to the control pin of the laser is eliminated when the first motor starts and stops, effectively protecting the laser. Attached Figure Description

[0014] Figure 1 A schematic diagram of the electrical connections for a laser direct writing device without the addition of a filter circuit;

[0015] Figure 2 for Figure 1 Enlarged view of the laser component 20;

[0016] Figure 3 for Figure 1 A schematic diagram of the electrical connections after adding a filter circuit. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are only used to describe distinctions and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate object; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] refer to Figure 3 To enhance the electromagnetic interference resistance of laser direct writing equipment, this utility model discloses a filtering circuit for the laser direct writing equipment, comprising: a terminal block 30, a first motor 13, a starting capacitor 14, a first switching power supply 11, a laser assembly 20, an oscilloscope 12, a second switching power supply 15, a second motor 17, and a solenoid valve 16. The terminal block 30 divides the mains power into several power supply paths, which respectively supply power to several power-consuming units of the laser direct writing equipment. The first power supply path supplies power to the laser assembly 20 through the first switching power supply 11, and the laser assembly 20 is electrically connected to the oscilloscope 12; the second power supply path supplies power to the second motor 17 through the second switching power supply 15; the second switching power supply 15 provides power to the solenoid valve 16. The improvement of this utility model is that it further includes a first resistor R1, a first capacitor C1, an isolation transformer 31, a second resistor R2, and a second capacitor C2; one end of the first capacitor C1 is connected to the second switching power supply 15, and the other end is connected to one end of the first resistor R1, and the other end of the first resistor R1 is connected to the second motor 17; one end of the second resistor R2 is connected to the second switching power supply 15, and the other end is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the solenoid valve 16; the third power supply of the plurality of power supplies supplies power the isolation transformer 31, and the isolation transformer 31 is connected to the first motor 13.

[0020] Since the first resistor R1 and the first capacitor C1 are connected in series to form a filter circuit, which is then connected to the second motor 17, the voltage interference to the control pin 22 of the laser is eliminated when the second motor 17 starts and stops. Similarly, the second resistor R2 and the second capacitor C2 are connected in series to form a filter circuit, which is then connected to the solenoid valve 16. The electromagnetic interference generated when the solenoid valve 16 starts and stops is filtered out by the same circuit, eliminating voltage interference to the control pin of the laser and effectively protecting the laser assembly 20.

[0021] After the isolation transformer 31 is connected to the first motor 13, it is then connected to the terminal block 30. The starting capacitor 14 is connected to the first motor 13 and is responsible for starting the first motor 13. When the first motor 13 starts and stops, the isolation transformer 31 isolates the power supply of the first motor 13 from the third power supply provided by the terminal block, eliminating the electromagnetic interference generated when the first motor 13 starts and stops, and eliminating the voltage interference to the control pins of the laser, thereby effectively protecting the laser assembly 20.

[0022] The oscilloscope 12 is used to display the waveform of the voltage at the control pin of the laser when the first motor, the second motor, and the solenoid valve are started.

[0023] In some embodiments, the first motor is preferably a DC motor.

[0024] In some embodiments, the second motor is preferably an AC motor.

[0025] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filtering circuit for a laser direct writing device, comprising: Terminal block, first motor, starting capacitor, first switching power supply, laser assembly, oscilloscope, second switching power supply, second motor, solenoid valve; The terminal block divides the mains power into several power supply paths. The first power supply path of the several power supply paths supplies power to the laser assembly through the first switching power supply. The laser assembly is electrically connected to the oscilloscope. The second power supply of the plurality of power supply channels supplies power to the second motor through the second switching power supply. The second switching power supply supplies power to the solenoid valve; The system is characterized by further comprising a first resistor, a first capacitor, an isolation transformer, a second resistor, and a second capacitor; one end of the first capacitor is connected to the first switching power supply, and the other end is connected to one end of the first capacitor, and the other end of the first capacitor is connected to the second motor; one end of the second capacitor is connected to the second switching power supply, and the other end is connected to one end of the second capacitor, and the other end of the second capacitor is connected to the solenoid valve; the third power supply of the plurality of power supplies supplies power the isolation transformer, and the isolation transformer is connected to the first motor.

2. The filtering circuit for a laser direct-writing device as described in claim 1, characterized in that, The first motor is a DC motor.

3. The filtering circuit for a laser direct-writing device as described in claim 1, characterized in that, The second motor is an AC motor.

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