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Limit Switch The Protection Switch Is Not Damaged

Ningbo Beto Electric Co.,Ltd | Updated: Jul 18, 2017

Limit switch, also known as stroke limit switch, used to control the travel of machinery and equipment and limit protection. In actual production, the stroke limit switch is installed in the pre-arranged position. When the module mounted on the machine moving parts strikes the stroke switch, the contact action of the stroke limit switch is realized to realize the switching of the circuit. Therefore, the limit switch is a moving parts according to the movement of the location of the switch circuit of electrical appliances, and its role is similar to the principle of the button. Limit switches are widely used in various types of machine tools and lifting machinery, to control its travel, the terminal limit protection. In the elevator control circuit, but also the use of limit limit switch to control the speed of the car door, automatic door opening limit, the car on the lower limit protection.

The limit switch is an electrical switch that limits the movement limit of the machine. The limit switches are contactless and non-contact. Contact with the more intuitive, mechanical equipment on the moving parts, the installation of the on-trip switch, and its relative movement of the fixed point on the installation of the limit position of the block, or the opposite installation location. When the mechanical switch of the travel switch touches the stopper, the control circuit is cut off (or changed), and the machine stops running or changes the operation. Due to the inertia movement of the machine, this stroke switch has a certain "overtravel" to protect the switch from damage. Non-contact form of many, common reed switch, photoelectric, induction, etc., these forms are able to see in the elevator. Of course there are more advanced forms.

The limit switch is an electrical switch that limits the movement limit of the machine. On the moving parts of the machine, install the upper limit switch, or the relative position of the relative movement of the installation of the fixed position of the stop, or the opposite installation location. When the mechanical switch of the travel switch touches the stopper, the control circuit is cut off (or changed), and the machine stops running or changes the operation. Due to the inertia movement of the machine, this stroke switch has a certain "overtravel" to protect the switch from damage.

This function is achieved by means of two stroke switches or proximity switches mounted on the drill mast to ensure that the angle of the drill mast does not exceed the limit and prevents the lateral inclination of the mast from tilting. When the drill mast left to the extreme position, the left limit switch action, this time the operation of drilling mast leveling handle, drill mast can only move to the right, can not move to the left. On the contrary, when the drill mast right to the extreme position, the right limit switch action, this time operation drill mast leveling handle, drill mast can only move left, can not move to the right.

Limit switch, also known as the trip switch, position switch, etc., is a commonly used small current master electrical appliances. The use of mechanical moving parts of the collision to make its contact to achieve the opening or breaking control circuit, to achieve a certain control purposes.

Limit switch mainly by the actuator, contact system and the shell composed of three parts. In practical applications, the limit switch is usually installed in the pre-arranged position, when the mechanical impact block or moving parts hit the limit switch, the switch internal contact action, to achieve the circuit switch.