¿Usted ya necesitó para una aplicación de un potenciómetro "sin fin" o "endless" que pueda girar continuamente la rotación completa de 360 ​​grados? Sí, este componente existe. Es el potenciómetro Endless y la Piher los fabrica. En este artículo tratamos un poco de este componente que puede ser de gran utilidad en un proyecto de automatización.

(*) Este artículo se basa en el datasheet del ST-15, potenciómetro Endless de Piher que se puede adquirir en Mouser Electronics en el enlace: https://www.mouser.com/new/piher/piher-st-15-rotation-potenciómetros/El datasheet, a su vez, se puede acceder en el enlace: https://www.mouser.com/datasheet/2/325/ST-15-1368214.pdf 

   Los potenciómetros comunes tienen un giro definido, normalmente llegando a los 270 grados, obteniéndose así un rango de control que no es total si se tiene en cuenta el giro posible del eje, como muestra la figura 1.

 

Figura 1 - Rango de giros de un potenciómetro común
Figura 1 - Rango de giros de un potenciómetro común

 

   En muchas aplicaciones que involucran el uso del potenciómetro para el sensor, este ángulo no es problema, pero puede ser que ocurra la necesidad de obtener un sensor en el giro completo y, más que eso, que el potenciómetro pueda ser libre dando vueltas "sin detener ".

   Para este propósito se debe utilizar un pote con características especiales que es el llamado "endless" o sin fin.

   Phier, cuyos componentes se pueden adquirir en Mouser Electronics, ofrece una línea de potenciómetros de 360 ​​grados de 15 mm. La serie ST-15 se puede encontrar con valores de 1 k a 100 k en la serie de 1 - 2 - 2,2 - 2,5 - 47, y 5).

    En la figura 2 tenemos los aspectos de estos componentes.

 

Figura 2 - Tipos
Figura 2 - Tipos

 

   

Y para facilitar el uso en una aplicación el fabricante también ofrece prolongaciones, ejes y otros recursos mecánicos de acoplamiento a su sistema, mostrados en la figura 3.

 

Figura 3 - Ejes y prolongaciones
Figura 3 - Ejes y prolongaciones

 

    

 

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