Rotary gear limit switches are used to control the movement of industrial machinery when it’s necessary to measure movement based on the rotation angle and/or the number of shaft revolutions, providing upper, lower and/or intermediate limits for moving machinery and mechanisms.
Usually connected to the motor shaft, the rotary gear limit switch uses a series of gears and cams to activate a microswitch when the appropriate number of rotations is reached. This is generally used to stop the engine when a moving load has reached the desired position or final positions.
The device, through a gear transmission, controls a cam system operating on 2, 4 or more microswitches that after a certain number of revolutions predispose the engine or the equipment to the start or stop. Each cam is equipped with a “micrometric” adjustable register screw that operates in a dependent way, so it is possible to calibrate the opening and closing of each microswitch according to the necessary requirements. The gear transmission system allows to choose different ratios and can be supplied in a bi-protruding shaft version or with linear control (potentiometer or encoder).
Each series of rotary limit switch has specific features which reduce time and costs for installation and maintenance.
Giovenzana International B.V. offers rotary gear limit switches with standard ratios or direct ratio. They can be configured and combined with encoders and potentiometers to reach your own needs. We can offer snap action switches and different cam type to meet customers requirements.