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How to choose the right proximity switch?

First you need to figure out the characteristics of the proximity switch: the proximity switch senses that the object is metal, and usually has a certain sensing distance and sensing frequency. These factors can affect the performance of the proximity switch. 
1. Sensing distance: between 2mm-15mm, the longer the sensing distance, the larger the size of the proximity switch. Therefore, it is especially important to select the sensing distance for certain situations where installation factors need to be considered.
2, induction frequency: each type of proximity switch has an inductive frequency, such as: 500HZ, then more than this inductive frequency must use another A type of proximity switch. 
So when choosing the proximity switch, you need to consider the factors of the sensing distance and the sensing frequency according to the actual needs, and then determine what kind of approach to choose. switch. 

Misunderstanding of photoelectric switch sensing distance?

Each reflective photoelectric switch will have a sensing distance. This sensing distance is usually based on pure white as the reference color of the sensing object, white because of its The absorbance is poor and the reflectivity is good, so the sensing distance is much longer than other colors. If the sensing distance of a photoelectric switch is 30CM, then the photoelectric switch may sense a distance of only 15cm when inducing a dark color object, especially a black object. Because the black light absorption is very good, the reflectivity will be quite poor. When the infrared rays are irradiated onto the surface of the black object, the light source is absorbed, so the sensing distance of the black object is the shortest, and even the insensibility cannot occur. 
The sensing distance of the photoelectric switch also has a certain relationship with the external light intensity. 

Mechanical counter is too noisy?

There are mostly problems caused by improper installation of the counter, which makes the transmission part not smooth, or the counter is too long, and the internal parts have Wear and need to be returned to the factory for repair. 

No Signal Output?

The output contacts are burned or the output settings are incorrect.

The length measurement is not accurate?

The actual length measured by the length measuring counter is not accurate. It may be caused by the relative sliding of the transmission part and the measuring device, or the counter ratio coefficient setting is incorrect.

Counter count less?

It may be that the frequency or amplitude of the counting signal does not match the counting parameter requirement or the counting ratio coefficient is incorrectly set.

Electronic counter supporting photoelectric switch use precautions?

1. The infrared sensor is a diffuse reflection type, and the standard test body used is a flat white paper. 
2, infrared photoelectric switch can work stably under the condition of high ambient illumination, but in principle, avoid the sensor optical axis facing the sun, etc. Strong light source. 
3. The minimum detectable width of the on-beam photoelectric switch is 80% of the width of the photoelectric switch lens. 
4. When using inductive loads (such as lamps, motors, etc.), its transient inrush current is large, which may deteriorate or damage the AC two-wire optoelectronics. Switch, in this case, please switch the load through the AC relay. 
5. The lens of the infrared photoelectric switch can be wiped with lens paper to disable chemicals such as dilution solvent to avoid permanent damage to the plastic mirror. 
6. For the actual requirements of the user's site, under some harsh conditions, such as dusty occasions, the photoelectric switch produced is sensitive. The choice has been increased by 50% to accommodate the long-term use of the photoelectric switch maintenance cycle requirements. 
7. In order to avoid accidents, please check if the wiring is correct before the power is turned on, and check whether the voltage is rated. 

Which sensors can be used with the meter?

Digital display meters usually receive pulse signals. The main sensors that can be used with them are the following:
1, proximity switch: optional if the accuracy is not high
2, meter wheel: the accuracy is higher than the proximity switch, mainly used for wires, cables, cloth, etc.
3. Rotary encoder: high precision, can be added and subtracted, mainly used to measure high-value products
Other sensors such as photoelectric switches, Hall switches, etc. can be used with the meter, and you need to determine yourself before selecting the matching sensor. The actual needs, do not blindly pursue high precision.