Where are speed ​​shift cam operated limit switch used?

As a precision travel control device, the speed shift cam operated limit switch plays a key role in the field of industrial automation. Its core function is to use the speed change design of the cam profile to convert rotary motion into precise linear or angular position detection signals. This design allows the switch to be triggered promptly and reliably at the preset critical point when the speed of the mechanism changes, which is particularly suitable for complex working conditions that require speed control based on position or angle.

Speed shift cam limit switches are particularly widely used in large and long-stroke mechanical equipment. For example, in the reciprocating motion of material conveying systems or large workbenches, the drive motor often needs to slow down when approaching both ends of the stroke to reduce impact and ensure positioning accuracy. At this time, the speed shift cam limit switch will be installed on the rotating shaft linked to the actuator. When the mechanism runs to the position where deceleration is required, the change in the cam profile will accurately trigger the first limit switch and send a deceleration command to the control system.

As the mechanism continues to move to the set extreme end position, further changes in the cam profile will trigger the second limit switch, issuing a stop or reverse run command, thereby effectively preventing mechanical damage or safety accidents caused by overtravel. This staged and precise control based on the change of the cam profile is difficult to achieve with ordinary linear limit switches.

In addition, variable speed shift cam operated limit switch are also widely used in occasions where high reliability and safety interlocking are required, such as in elevator operation control and door machine systems. Through the precisely designed cam curve, it can not only sense the leveling position and extreme position, but also output signals at the key angle points where the car running speed needs to be adjusted, ensuring that the elevator accelerates smoothly, runs at a constant speed, and accurately decelerates and stops at the target floor. With its sturdy structure, reliable response, good environmental resistance, and exquisite perception of the position of the speed change process, this switch has become an indispensable safety and control component for many automated production lines, lifting machinery, packaging equipment, CNC machine tools, etc., ensuring the smooth, precise and safe operation of the equipment.