What is the heat of the motor of the advertising engraving machine?

1. Why does the motor enter the heat? For all kinds of stepping motors, the inside is composed of iron core and winding coil. The winding has resistance, and the power will generate loss. The magnitude of the loss is proportional to the square of the resistance and current. This is what we often call the copper 陨. If the current is not a standard DC or sine wave, it will also produce harmonic loss; the core has hysteresis The eddy current effect, in the alternating magnetic field, also produces losses, the size of which is related to material, current, frequency, voltage, which is called iron loss. Both copper loss and iron loss are manifested in the form of heat, which affects the efficiency of the motor. Stepper motors generally pursue positioning accuracy and torque output, low efficiency, relatively large current, high harmonic content, and alternating current frequency with speed. The AC motor is serious.

2, a reasonable range of motor heating into the motor to what extent, mainly depends on the internal insulation level of the motor. The internal insulation properties are destroyed at high temperatures (above 130 degrees). Therefore, as long as the internal temperature does not exceed 130 degrees, the motor will not be damaged, and the surface temperature will be below 90 degrees. Therefore, the stepper motor surface temperature is normal at 70-80 degrees. The simple temperature measurement method is useful for point thermometers, and can also be roughly judged: the hand can be touched for more than 1-2 seconds, not more than 60 degrees; the hand can only touch, about 70-80 degrees; a few drops of water quickly It is more than 90 degrees.

3. When the motor heat changes with the speed, the constant current driving technology is adopted. When the stepping motor is static and low speed, the current will remain relatively constant to maintain the constant torque output. When the speed is high to a certain extent, the internal back EMF of the motor rises, the current will gradually decrease, and the torque will also decrease. Therefore, the heat generated by the copper loss is related to the speed. Generally, the heat is high at static and low speeds, and low at high speeds. However, the change in iron loss (although the proportion is small) is not always the case, and the whole heat of the motor is the sum of the two, so the above is only the general case.

4, the impact of the tropics Motor heating, although generally does not affect the life of the motor, for most customers do not have to pay attention. However, severe fever can have some negative effects. If the thermal expansion coefficient of each part of the motor is different, the structural stress changes and the small change of the internal air gap will affect the dynamic response of the motor, and the high speed will easily lose the step. In some cases, excessive heating of the motor, such as medical equipment and high-precision test equipment, is not allowed. Therefore, the necessary control of the heating of the motor should be carried out.

What are the advantages of advertising engraving machines?

1. High cutting precision: It adopts high-precision laser cutting technology to cut the surface of the material and at the same time use pure auxiliary gas to reflect the perfect cutting effect.

2, non-contact processing: laser cutting machine can accurately cut the curve pattern on acrylic, two-color board and other materials. Since the advertising engraving machine is non-contact processing, it does not crush the material, and the incision is smooth, and there is no need to perform secondary rework.

3. High flexibility: The laser cutting machine has high flexibility and can process some complex graphics, which not only reduces the difficulty of processing products, but also improves the diversity of products. For advertising companies, advertising engraving machines can not only increase the added value of products, but also reduce processing costs and increase additional profits.

The high-quality laser cutting machine can produce beautiful advertising word signs, with high precision of cutting words, one-time cutting, and no secondary processing. Cutting stainless steel characters can be used to make fine characters; in addition to cutting stainless steel plates, laser cutting machines can cut metal materials such as aluminum plates, and precision laser cutting machines can cut non-metallic materials and cut fine.

Finally, how to maintain the advertising engraving machine?

1. Check before starting every day; if the communication line, motor line, and optocoupler line are loose, whether the voltage is stable; then turn on the power of the machine, operate the machine to move back and forth twice, and start the operation.

2. Clean the sensor (optocoupler, proximity switch) to prevent the dust powder from sticking to the sensor, affecting its sensitivity or causing false touches.

3. Clean the dust debris on the exposed rails (light rods) and clean them with No. 2 oil. After cleaning, add butter or No. 2 lithium grease.

4. After one day's work is completed, first remove the engraving knife and let the spindle chuck and lock nut be in a relaxed state. This helps to extend the life of the spindle chuck. Then we began to clean the work surface, can be cleaned with a brush; pay attention to the work surface is usually not to accumulate debris, so as to avoid deformation of the platform.

5, the water-cooled spindle engraving machine should ensure the cleaning of the cooling water and the normal operation of the pump, must not make the water-cooled spindle motor water shortage, regularly replace the cooling water to prevent the water temperature is too high, as much as possible circulating water, you can change the capacity Water tank.

6. Move the machine head to the lower left or lower right position to prevent collision, and then cut off the power; do not pull the plug with power.

7. Maintenance of the engraving machine when not in use for a long time: When the engraving machine is not used for a long time, it should be energized 1-2 times a week, especially in the rainy season with large environmental humidity, so that the engraving machine can run for an hour or so. The heat of the electrical component itself is used to dissipate the moisture in the numerical control system to ensure stable and reliable electronic performance.

8. Maintenance of the inverter: The inverter has been debugged before leaving the factory. It is forbidden to debug and change the line privately to prevent damage to the motor or inverter caused by data input error.

9. Regularly clean the cooling and ventilation system of the circuit box. Please check regularly whether the fans on the electric control box are working normally. Clean the dust in the electric control box with a vacuum cleaner regularly, and check whether the screws on the terminal block are loose to ensure the circuit is safe and reliable. use.

10. The door of the electric control box should be opened as little as possible. It is forbidden to open the door. When engraving, there will be dust, wood chips or metal powder in the air. Once they fall on the circuit board or electronic device inside the electric control box, it is easy to cause the element. The insulation resistance between devices drops, and even components and boards are damaged.

11. Regularly check whether the screws of the various parts of the machine are loose.

12, vacuum pump maintenance:

The wire mesh in the suction port of the A water circulation air pump is used to prevent the foreign dust particles from entering the pump body. The filter screen should be kept clean at any time to avoid the blockage and cause the pumping speed to drop. When the pump is not in use, it should be energized every few days. Minutes to prevent the long rust of the pump body from working properly.

B Tongyou vacuum pump should also loosen the wing nut, remove the paper filter core and clean the filter with high pressure gas regularly. It is found that the filter element is not well ventilated or damaged, and should be replaced in time. According to the length of use, the high pressure oil gun can be used to oil the bearings.

13. Operate in strict accordance with the instructions for use and comply with the safe use specifications.

The engraving machine is also alive as a human being. If the parts of the engraving machine are always in good condition, it is very important to maintain regular maintenance. This can eliminate many hidden dangers in the bud and prevent a serious accident. Operators should develop good habits that are often used to maintain equipment!