First, simple identification of dead soldering lights
A relatively simple but quite effective way to identify LED dead lights is to heat the off lamps. We heat the LED leads of some non-bright LED lights to 200-300 ° C, remove the fire source, connect the LEDs with positive and negative electrodes with a 3 volt button battery, if the LED lights can be lit at this time, but with the lead temperature Decrease the LED light from light to off, which proves that the LED light is a virtual solder. The reason why the heating can be lit is to use the principle of thermal expansion and contraction of the metal. When the LED lead is heated, the expansion elongation is connected to the internal solder joint. When the power is turned on, the LED can normally emit light, and the LED lead shrinks with the temperature drop. When it returns to the normal temperature state, it is disconnected from the internal solder joints, and the LED light is not lit. When this happens, it is a dead light caused by the virtual soldering.
Second, simple solution to LED dead light method
1, solve electrostatic damage to the LED chip, so that the PN junction LED chip failure leather lead to dead lights of the method. The PN junction of the LED chip is invalid, and most of the dead lights are caused by the workers themselves. The static electricity of the human body is related to the different fabrics worn by people and the physical condition of each person. We take off clothes in autumn and winter nights. It is easy to see the discharge phenomenon between clothes, so you should wear anti-static clothing when working, with an electrostatic ring, the electrostatic ring should be well grounded, there is a static ring that does not need to be grounded. The anti-static effect is not good, it is recommended not to use the belt. This kind of product, if the staff violates the operating procedures, should receive corresponding warning education, and also play a role in notifying others.
2, the negligence of a certain link in the packaging process is the cause, the cause of this LED dead light is mainly caused by the negligence of the staff. If the staff accidentally puts the silver glue (for a single solder joint chip) a little more or less, it will not work. If more glue is returned to the chip gold pad, it will cause a short circuit, and the chip will not stick well. . The welding process, the temperature is generally 280 ° C is the best, the pressure, time, temperature, power of the gold wire ball welder four parameters should be just right, otherwise, the pressure is easy to crush the chip, too small is easy to solder.
A Dc Motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor.
DC motors were the first type widely used, since they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight motor used for portable power tools and appliances. Larger DC motors are used in propulsion of electric vehicles, elevator and hoists, or in drives for steel rolling mills.
Dc motor areas of application: smart home field, robotics, precision medical equipment industry, automotive drive field, electronic products and personal care equipment
Application of the product:
Features: high torque, low noise, small volume, light weight, easy to use, running constant speed, etc., can also be matched with various gearboxes to change the output speed and torque.
Features: small volume, fast speed, stable performance, low price, good speed regulation.
Method of use: the best stable in horizontal plane, installed on the dc motor output shaft parts, cannot use a hammer to knock, knock prone to press into the dc motor drive, may cause damage to internal components, and cannot be used in the case of blocked.
Operating temperature range:
DC motor should be used at a temperature of -10~60℃.
The figures stated in the catalog specifications are based on use at ordinary room temperature catalog specifications re based on use at ordinary room temperature (approximately20~25℃.
If a geared motor is used outside the prescribed temperature range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.Depending on the temperature conditions ,it may be possible to deal with them by changing the grease of the motor's parts.Please feel free to consult with us about this.
Storage temperature range:
DC motor should be stored ta a temperature of -15~65℃.
In case of storage outside this range,the grease on the gearhead area will become unable to function normally and the motor will become unable to start.
Service life:
The longevity of DC motor is greatly affected by the load conditions , the mode of operation,the environment of use ,etc.Therefore,it is necessary to check the conditions under which the product will actually be used .The following conditions will have a negative effect on longevity.Please consult with us should any of them apply.â—Use with a load that exceeds the rated torque
â—Frequent starting
â—Momentary reversals of turning direction
â—Impact loads
â—Long-term continuous operation
â—Forced turning using the output shaft
â—Use in which the permitted overhang load or the permitted thrust load is exceeded
â—A pulse drive ,e.g.,a short break,counter electromotive force,PWM control
â—Use of a voltage that is nonstandard as regards the rated voltage
â—Use outside the prescribed temperature or relative-humidity range,or in a special environment.
â—Please consult with us about these or any other conditions of use that may apply,so that we can be sure that you select the most appropriate model.
when it come to volume production,we're a major player as well .each month,we rurn out 600000 units,all of which are compliant with the rohs directive.Have any questions or special needed, please contact us, we have the engineer group and best sales department to service to you Looking forward to your inquiry. Welcome to our factory.
Dc Motor
Dc Motor,Small Dc Motor,Mini Dc Motor,Robot Dc Motor,Dc Motor With Gearbox
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