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Pepperl+Fuchs Blog

Cable Pulls-7 Ways They Pull Their Weight for Rotary Encoders

Posted by Patricia Stafford on Fri, Aug 05, 2016

While many applications use rotary encoders with shafts to monitor rotational speed, some situations call for a different solution—the use of a cable pull.

What all cable pulls have in common is that they are devices that, when used together with rotary encoders, provide precise linear measurements. They are ideal tools for applications where you need information on linear displacement feedback. Cable pulls have a lot to offer when it comes to mobile equipment (including cranes and forklifts), conveyor systems in material handling, safety switches, wind turbines, elevators, and more. 

Industrial Forklift There’s quite a variety of cable pulls available, designed with various purposes in mind and each with its own strength based on what you need to do and how you need to do it. Here is a look at 7 ways that cable pulls can benefit you.

1. Light-weight, compact design for quick and easy applications

Where space is at a premium and you want a cost-effective, simple solution — a cable pull with a light-weight, plastic housing and a slim design with direct coupling can go a long way.

2. Measures in linear direction

It doesn’t matter which direction an object is moving, as long as it’s linear motion. No “sensing range” is necessary. The only measurement limit is the physical length of the cable.

3. Long lasting and more durable compared to linear transducers

Cable pulls as a rule outlast linear transducers, and normally last many years.

4. Good for dirty or dusty environments

Cable pulls can operate regardless of getting dirty or how much dust there is in the surrounding area. Cable pulls that come with accessories such as a bellows with steel tip, brush attachment, or compressed air attachment help clear the way for success.

5. Rugged enough for everyday industrial use

A cable pull with a housing consisting of aluminum or a specially coated aluminum alloy is built to withstand the wear and tear of industrial applications. This type of cable pull is a step up from the most basic models, providing a higher level of quality solutions for the more common applications while remaining cost-effective.

Pepperl Fuchs Cable Pull

ECN20IL cable pull attached to a rotary encoder. Its flexible cable entry and exit point
increases the range of movement and helps prevent rubbing or kinking of the cable.

6. Heavy-duty for harsh environments

A durable design is critical to maintaining a cable pull in good working order under challenging conditions. Shocks and vibrations, thick dirt and grime, and extremely high or low temperatures can all take their toll on equipment. Some cable pulls come with an open cable system that allows for easy cleaning and grooved cable drum and guided wheel to ensure accuracy and long service life. Having a cable pull that is built rugged enough to withstand the toughest environments while maintaining the required precision makes all the difference.

7. Versatility

The ability to add just the right accessories to your cable pull increases its flexibility and durability, giving you a wider range of application possibilities. In addition to the cleaning accessories mentioned above, cable pull options can include a guide pulley or double guide pulley.

Questions about Rotary Encoders?  Get the Quick Select Product Guide

Topics: Rotary Encoders

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