Usually Laser Marking Machine galvanometer (including common semiconductor laser marking machine and carbon dioxide laser marking machine, Fiber Laser Marking Machine) are composed of two parts: the first is the controller; the second is the vibration lens (motor ), the impact of the vibration lens on the performance of the laser marking machine , what is the role of the laser marking machine ?
The first aspect of the laser marking machine vibration lens consists of:
It consists of three parts: stator, rotor and detection sensor. The vibrating lens is a moving coil type (the rotor is a coil), the other is a moving magnetic type (the rotor is a magnetic core), all the vibrating lenses are made of a permanent magnet as a magnetic core; the detecting sensor is a capacitive sensor, and the detecting galvanometer is a capacitive sensor. The digital galvanometer is a grating scale detection sensor. The capacitive sensor is a small change in the capacitance of the detecting sensor when the motor is oscillating, and the amount of change in the capacitance is converted into an electrical signal, which is fed back to the controller for closed-loop control. The grating scale sensor measures the actual deflection angle through the grating ruler, and converts it into an electrical signal, which is fed back to the controller 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 basically not used now. Therefore, the dynamic magnetic type core-core magnetic core is tightly mounted on the rotating shaft, and the volume is small, the inertia is small, and the quick response performance is good, which is more conducive to high-speed marking of the laser marking machine.
The second aspect of the laser marking machine galvanometer motor motor classification:
Motors are mainly divided into four categories: AC motors, DC motors, AC motors, and special-purpose motors. AC motors include synchronous motors, asynchronous motors. Special-purpose motors include electric dynamometers, synchronous camera, camera, micro-motors, and other special-purpose motors. The laser marking machine vibration lens belongs to the oscillating motor in other special purpose motors.
The working principle of the third part of the laser marking machine galvanometer motor:
The motor uses the magnetic field as the medium and uses electromagnetic induction to realize energy conversion. Therefore, it 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 motion is called the rotor, and the stationary 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. In the internal energy conversion process of the motor, there are electrical energy, mechanical energy, magnetic field energy and thermal energy, wherein the thermal energy is generated by the internal energy loss of the motor, and the design is minimized. For the motor, electric power from the power input coupled to the electromagnetic field energy storage delta = + + output motor internal energy loss of mechanical energy, for the generator, the mechanical energy input from the electromagnetic field coupling = mechanical energy storage system increments the motor + Internal loss energy + output power .
Finally, what is the requirement for the galvanometer in the laser marking machine? Because the laser marking machine relies on the X and Y vibration deflection, the light is reflected onto the work surface for precise engraving. The control of the galvanometer is controlled by the open loop of the computer. Therefore, the requirement must be linear, that is, the input signal has a linear relationship with the deflection angle. Since the galvanometer is a fast precision machine, it is required that the acceleration from the working state to the other working state is as high as possible, so that the marking time of the laser marking machine is infinitely small.
