The composition and working principle of laser marking machine galvanometer


I.The fundamental structure of the vibrating lens: 

The vibrating lens is composed of a stator, a rotor and a detecting sensor. The vibrating lens uses a permanent magnet as the magnetic core, the detecting sensor simulates the galvanometer as a capacitive sensor, and the digital galvanometer is a grating detecting sensor. The capacitive sensor is a small change in the capacitance of the detecting sensor when the motor is oscillating. The change in the capacitance is converted into an electrical signal, fed back to the manipulator, and then closed-loop controlled. The scale sensor is used to measure the actual deflection point of view through the grating ruler, and then converted into an electrical signal, which is fed back to the manipulator for closed-loop control. Because the rotor is a coil, the coil is relatively large in volume and large in inertia, which is not conducive to rapid response, so it is not used at all. The dynamic magnetic type hollow core magnetic core is tightly mounted on the rotating shaft, and the volume is small and the inertia is small, so the rapid response function is excellent.

II. The principle of laser galvanometer: 

Input a position signal, the swing motor (laser galvanometer) will swing a certain angle according to the conversion ratio of a certain voltage and angle. The whole process adopts closed-loop feedback control, which is composed of five control circuits, such as position sensor, error amplifier, power amplifier, position distinguisher and current integrator. The principle of the digital laser galvanometer is to convert the analog signal into a digital signal on the principle of the analog laser galvanometer. How to disassemble and check the laser marking machine galvanometer

III.The fundamental operating principle of the motor: 

The motor uses the magnetic field as the medium and uses the electromagnetic induction to complete the energy conversion. Therefore, the internal circuit must have a magnetic circuit that conducts magnetic flux and a circuit that conducts current. When the motor performs energy conversion, it should have two major components for relative motion: the component that establishes the excitation magnetic field and the component that is inductive. The movement is called the rotor, and the stop is called the stator. The generator absorbs mechanical power from the mechanical system and outputs electrical power to the electrical system; the electric motor absorbs electrical power from the electrical system and outputs mechanical power to the mechanical system. During the internal energy conversion process of the motor, there are electrical energy, mechanical energy, magnetic field energy and thermal energy. During this period, the thermal energy is caused by the internal energy loss of the motor, and the design is minimized. For the motor, the energy input from the power supply = the energy storage in the coupled electromagnetic field + the internal energy loss of the motor + the mechanical energy of the output. For the generator, the mechanical energy input from the mechanical system = the energy storage in the coupled electromagnetic field + motor Internal loss energy + output power.

IV. Classification of electric motors: 

General electric motors are divided into four categories: communication motors, DC motors, AC-DC motors, and special-purpose motors. The communication motor includes a synchronous motor and an asynchronous motor. The special purpose motor includes an electric dynamometer, a synchronous camera, a camera, a micro motor, and other special purpose motors. The laser marking machine vibration lens belongs to the rocking motor in other special purpose motors.

V. The fundamental requirement of the manipulator: 

Since the laser marking machine relies on the cooperation of X and Y vibration deflection, the light is reflected onto the work surface for accurate carving. The operation of the galvanometer is controlled by the open loop of the computer. Therefore, the demand needs to be linear, that is, the input signal has a linear relationship with the deflection viewpoint. Since the galvanometer is a fast precision machine, the greater the acceleration from one working condition to another, the better.



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