What is a limit switch? How does a limit switch work

When it comes to the limit switch, a lot of people are not strange, but if you really want to tell you about it in detail, accurate answer limit switch in the end is what, or let a lot of people confused. Want to know more? Below, please follow the footsteps of Xiaobian to see what the limit switch is. 

What is a limit switch 

Limit switch, also known as travel switch, can be installed in relatively static objects (such as fixed door frame, door frame, etc., referred to as still life) or moving objects (such as moving vehicles, doors, etc., referred to as animals). When the animal approaches the stationary object, the linkage of the switch activates the contact of the switch, causing the closed contact to break or the open contact to close. The circuit and motor are controlled by the change of the open and close state of the switch contacts. 

Limit switch is a commonly used small current control electrical appliance. The contact action is made by the collision of the moving parts of the production machinery, and the control circuit is connected or disconnected to achieve a certain control purpose. Usually, this type of switch is used to limit the position or stroke of the mechanical movement, so that the moving machinery according to a certain position or stroke automatically stop, reverse movement, variable speed movement or automatic reciprocating movement. 

In electrical control system, limit switch is used to realize sequence control, positioning control and position state detection. Used to control the stroke and limit protection of mechanical equipment. Structure: It consists of an operating head, a contact system and a housing. 

Working principle of limit switch 

Limit switch is divided into working limit switch and limit limit switch. The working limit switch is used to signal the movement of the mechanism. Limit switch is to prevent accidents caused by mechanism movement beyond the design range. The working limit switch is installed in the position where the mechanism needs to change the working state. W