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Problems encountered when using limit switch

Publish time: 2023-05-11 16:04:31

Industrial limit switches are widely used in various detection and control applications. The limit switch can complete with/without detection in the area that allows physical contact. When an object is detected, the switch implements the arranged action, the normally open or normally closed contact in the switch body will change the situation, and then complete the AC/DC circuit on and off.


When the equipment is placed on heavy construction machinery, agricultural equipment or solid waste disposal vehicles, the function of the limit switch will be tested to the extreme. These applications produce very violent shocks and vibrations. These machines and equipment usually operate in very harsh outdoor and dirty environments all year round, and are therefore subject to various environmental factors. In these cases, it is very challenging to usefully adhere to the corresponding function and function of each action of the limit switch. Regarding limit switch users, reliability, durability and security are three key elements.


Taking into account the impact and vibration of these machines, the general limit switch is very likely to encounter the following situations:


Switch contact defect


The internal and external mechanical connections of the switch are damaged or loose


The abrasive powder produced by the internal parts of the switch leads to a large reduction in the life of the switch, and even causes related shortcomings or incidents


Chuck and concave head planning, can adhere to the head end to the main body of solid clamping


An enhanced plug terminal plan is used between the switch body and the socket to maintain electrical continuity under pole temperature, vibration and shock


Self - lifting platen terminal, save wiring time


The ground terminal (internal) is easy to identify and complies with the specifications of the relevant regulatory arrangements


Each switch has four device holes: two through holes for the front device and two threaded holes on the back for the rear device


Biaxial seals for additional maintenance (optional fluorocarbon or fluorosiloxane seals)


Common small sheet planning ensures proper torque


Use diaphragm seals as an additional maintenance method


The rugged and corrosion resistant zinc tip and body are treated with phosphate and have an epoxy coating


303 stainless steel operating shaft on sintered brass bearing for longer mechanical life and higher working reliability


National and international threaded conduit


Heavy duty limit switch application


Cement pump truck


Cement pump trucks have long articulated arms or rods that can transport concrete to locations that are difficult or inaccessible to conventional cement tankers or pumping machines.


Off-highway dump truck


Off-highway heavy dump trucks are usually equipped with an open compartment or dump bucket hinged to the back of the truck. These trucks experience very strong vibrations and shocks during normal operations. In addition, these trucks need to work in extreme weather conditions such as heat, cold, dust, corrosive chemicals, rain and wind.


Agricultural equipment


The planter is usually attached to the back of the farm tractor by a pull roller, and is therefore subjected to the intense vibrations and shocks brought about by the tractor and the dull, firm, uneven position.


Two GLE series industrial limit switches can be used to monitor the orientation of the planter's paddle arm, and the other GLC series industrial limit switches are used to monitor the on/off condition of the pneumatic system. In the process of transporting the planter from one position to another, it is essential to ensure that the rowing arm is at leisure and that the pneumatic system is turned off. These products are certified by CCC, CSA, CE and UL for global use.


Harbour bridge crane


The harbour bridge crane is a very valuable piece of equipment, once damaged, it requires costly maintenance or replacement costs. And a business strike caused by equipment damage can cost thousands of dollars. Therefore, it is very important to carry out a comprehensive test on the mechanical connections and accessories of the port bridge crane, so as to ensure the work and control. Another important specification for customers in the port crane business area is the overall reliability of the system and worker safety.


CNC machine tool


Numerical control (CNC) machine tools are complex machine tools that process things using pre-programmed programs to perform specific tasks (such as parts and assembly processing, etc.) that require high precision and accuracy.


conclusion


Heavy equipment and machinery in transportation, agriculture, solid waste disposal, construction or industry can all be affected by extreme work and harsh environmental conditions.



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