Reliable Linear Distance Measuring Using Cable Pulls
Pepperl+Fuchs modular cable pulls master a variety of challenges where other sensors reach their limits. Made from a combination of cable pull and matching rotary encoder, they are easily tailored to the exact needs of your application. Due to their robustness and their resistance to external influences, cable pulls are ideal for difficult industrial applications.
How Does a Cable Pull Work?
Cable pulls enable rotary encoders to measure linear motion. When the cable pull’s stainless steel cable retracts and extends, a spring-loaded drum rotates the drive shaft of the connected rotary encoder. With each revolution of the drive shaft, linear movement is translated into rotation. This allows the rotary encoder output signal to represent the linear distance of the connected mechanical device.
Depending on the output, cable pulls are coupled with incremental or absolute rotary encoders. They can either be supplied with a flange-mounted rotary encoder or they can be individually adapted. Standard rotary encoders with 58 mm diameter are connected to the flange of the cable pull via an eccentric clamping element. A guide pulley can be incorporated for measuring around corners or at different angles. This allows cables pulls to follow tracks or slides with non-linear paths while still providing precise measurement data.
Where Are Cable Pulls Used?
Often found in applications that involve accurate measurement of object or machine height, cable pulls can be integrated into forklifts or scissor lifts to provide real-time data on the exact height of the fork or basket. Since they do not need to be perfectly aligned to another sensor or target, they can provide accurate data while the vehicle is moving.
Heavy-duty cable pulls are used wherever extreme robustness is required—for example, to record exact position data for harbor cranes without being affected by rain, wind or spray mist.
Which Cable Pull Is Right for My Application?
Cable pulls are a practical solution for many industries. From compact models for use in simple applications to rugged, heavy-duty versions for harsh environments, Pepperl+Fuchs cable pulls provide durability, a long service life, and accurate measurement for up to 60 meters.
The cable pull series from Pepperl+Fuchs—from compact to extremely robust heavy-duty variants