Westlock Controls switch German Westlock Controls model Westlock Controls price

Westlock Controls switch, also known as a displacement switch, is a type of switch used to sense the distance to an object to perform a preset function, and has been widely applied. Main products include mobile phone proximity switches and long-distance measurement switches, which are applied in smart belts. Proximity switches can be classified into optical proximity switches, infrared proximity switches, ultrasonic proximity switches, etc., based on their working principles. Most proximity switches used in mobile phones are infrared proximity switches, which have an infrared emitting tube and an infrared receiving tube. When the infrared rays emitted by the emitting tube are received by the receiving tube, it indicates that the distance is close, and the screen needs to be turned off to prevent misoperation. When the receiving tube does not receive the infrared rays emitted by the emitting tube, it indicates that the distance is far, and there is no need to turn off the screen. The working principles of other types of proximity switches are similar; they also determine the distance by emitting and receiving some kind of substance, such as ultrasonic waves or light pulses.

Westlock Controls switch classification

1) Linear displacement switch: The function of a linear displacement switch is to convert linear mechanical displacement into an electrical signal. To achieve this effect, a variable resistor slide rail is usually fixed at the stationary part of the switch, and different resistance values are measured by the displacement of the wiper on the slide rail. The switch slide rail is connected to a stable DC voltage, allowing a small current in microamperes to flow. The voltage between the wiper and the start end is proportional to the length of the wiper movement. Using the switch as a voltage divider can minimize the requirement for the accuracy of the total resistance of the slide rail, because resistance changes caused by temperature variations will not affect the measurement result. 2) Angular displacement switch: Angular displacement switches are applied in obstacle handling: using an angular switch to control your wheels can indirectly detect obstacles. The principle is very simple: if the motor angular switch structure is operating but the gear does not rotate, it means your machine is blocked by an obstacle. This technology is very simple to use and very effective; the only requirement is that the moving wheel must not slip on the floor (or slip too frequently), otherwise you will not be able to detect the obstacle. An idler gear connected to the motor can avoid this problem; this wheel is not driven by the motor but is driven by the movement of the device: during the rotation of the drive wheel, if the idler wheel stops, it means you have encountered an obstacle.

Westlock Controls switch precautions for use

1) If the electronic scale has been in use for a long time, and the seal has aged while accumulating many impurities, water mixtures and oil will seriously affect the contact resistance of the brushes, causing the displayed numbers to jump continuously. In this case, it can be said that the electronic scale of the linear displacement sensor is damaged and needs to be replaced. 2) If the power supply capacity is too small, many issues will arise; therefore, the power supply must have sufficient capacity. Insufficient capacity will cause the following situations: the movement of the plasticizing unit will cause fluctuations in the display of the mold clamping electronic scale, or the movement of the mold clamping unit will cause fluctuations in the display of the injection molding electronic scale, resulting in significant measurement errors. If the driving power supply of the solenoid valve shares the same power source as the linear displacement sensor, the above situations are more likely to occur. In severe cases, voltage fluctuations can even be measured using the voltage range of a multimeter. If the issue is not caused by high-frequency interference, electrostatic interference, or poor neutral grounding, it is likely due to insufficient power supply capacity. 3) Frequency modulation interference and electrostatic interference can both cause the displayed numbers of the linear displacement sensor's electronic scale to jump. The signal cables of the electronic scale must be routed in separate cable ducts from the high-voltage lines of the equipment. The electronic scale must be forcibly mounted using a grounding bracket, ensuring good contact between the housing of the electronic scale and the ground. Shielded cables must be used for signal lines, and one end of the shielded cable should be grounded at the electrical cabinet. When high-frequency interference is present, voltage measurements with a multimeter usually appear normal, but the displayed numbers continue to jump. The situation is similar when electrostatic interference occurs. To verify if it is electrostatic interference, you can short-circuit the cover screw of the electronic scale to some metal part of the machine using a power cord. Once short-circuited, the electrostatic interference will be eliminated immediately. However, eliminating high-frequency interference is difficult using the above method. Variable frequency drives and robotic arms often generate high-frequency interference, so you can try stopping the variable frequency drive or the robotic arm to verify if high-frequency interference is the cause. 4) If the display data of the linear displacement sensor's electronic scale jumps regularly at a certain point during operation, or if there is no display data, check whether the insulation of the connection wires is damaged and causing regular contact with the machine housing, leading to a ground short circuit. 5) The supply voltage must be stable. Industrial voltage requires stability within ±0.1[%]. For example, if the reference voltage is 10V, a fluctuation of ±0.01V is allowed. Otherwise, it will cause significant fluctuations in the display. However, if the amplitude of the display fluctuation does not exceed the amplitude of the voltage fluctuation, the electronic scale is functioning normally. 6) The alignment of the linear displacement sensor installation must be precise. Parallelism allows an error of ±0.5mm, and angularity allows an error of ±12°. However, if both parallelism and angularity errors are excessive, the displayed numbers will jump. In such cases, the parallelism and angle must be adjusted. 7) During the connection process, pay close attention: the three wires of the electronic scale must not be connected incorrectly, and the power line and output line must not be swapped. If the wires are connected incorrectly, it will result in significant linearity errors, making control difficult and reducing control precision. The display will also be prone to jumping.

Westlock Controls switch applications

The geometric state parameters of train wheel flanges affect the speed and smoothness of train operation and are crucial for safe train operation. Traditional detection methods are relatively complex, usually involving specialized rulers with verniers for measurement, leading to significant measurement errors due to manual data reading, and failing to achieve digital management of detection data. With the development of China's railway industry, train speeds are increasing, making precise and rapid inspection and digital management of train wheel flange state parameters increasingly important. The flange detector adopts modern switch technology, a microcontroller processing system, and a concise and stable mechanical structure, enabling convenient and precise continuous rapid measurement of geometric state parameters, achieving digitization of parameters such as flange height and rim thickness. Many switches are used for detecting flange height, width, rim thickness, etc., with displacement switches being the most concerned. There are many types of displacement switches, and the current new switch technology used for train wheel flange shape detection is called laser displacement switch. Currently, the laser triangulation method is used for detection on train wheel flanges, offering high precision for short-distance measurements. The displacement switch can be directly installed on the track for detection, or a laser reflective displacement switch can be used as the measuring device, scanning the flange shape along a straight line while recording the entire flange data. The entire flange contour curve can be obtained through a microprocessor, thereby calculating flange width, flange height, 70mm wear amount, and wear area, etc. Moreover, the measured data can be uploaded to a computer to generate a database, utilizing advanced post-processing software for digital management of train wheel flanges. It can not only measure the wear of wheelsets on online operating trains but also sort qualified wheelset dimensions on the production line. The development of transportation relies on detection technology, and instruments and meters as well as switch technology are the core of detection technology. In today's era of rapid power development, people not only hope to experience comfort and enjoyment but also desire safety. The development of switch technology will bring more safety to people's lives and transportation, and the development of switch technology in China will also drive the development of world-class advanced technologies in transportation internationally.

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