When you are browsing through various industrial sensors in a catalog or online, you may encounter a signal output listed as push-pull. A push-pull output is a 4-in-1, meaning that one sensor can be wired to provide four different output signals.
The PRINT 2013 show, one of the most important printing & publishing tradeshows in United States, happens only once every four years. Don’t miss out. Everyone in the global printing industry comes to this show. Exhibitors show off their commercial printers, converters, and collating machines. Book binders and publishers attend to see what new technology is out there. And Pepperl+Fuchs' sensors are distinctively obvious everywhere you look.
Types of rotary encoders that work with cable pulls
Cable pulls are devices used to measure the distance traveled on a piece of equipment. You connect cable pulls to a rotary encoder that rotates around a shaft. The encoder sends output signals to a controller. With the data gathered from these signals, you can track the linear distance that the object connected to the cable pull is moving. How accurate this measurement is depends on the pulse count of the rotary encoder.
We offer cable pull models in two sizes. The cable length dictates which drum size and housing size to use. Use a larger housing to fit the longer cable lengths. Cable lengths are designated by the last two digits following SL30. Cable lengths of 1, 2, and 3 meters use the 80 mm x 80 mm housing size. Longer cable lengths use a housing size of 130 mm x 130 mm and up. The specifications list our cable pulls as having an IP65 degree of protection. However, this degree of protection applies only when you have an encoder attached to a cable pull, since there is a seal inside the cable pull. Figure 1 shows a rotary encoder connected to a cable pull.
Topics: Rotary Encoders
Rotary encoders with integrated functional safety
Historically, functional safety was based on an all-or-nothing approach. If safety devices such as e-stops, door switches, and light curtains were in the released state, the machine was running. When you pushed an e-stop or interrupted a light curtain, the machine shut down.
Proximity sensors and encoders can have NAMUR output
NAMUR is a type of sensor output that gives an on or off indication. There are different reasons why you may need a NAMUR sensor. I will go through some of them here.
In certain applications with spinning components, keeping track of the speed or revolutions per minute is vital for controlling equipment and processes. Pepperl+Fuchs offers several solutions to achieve this.
The MNI40 magnetic incremental rotary encoder is the most compact encoder in the Pepperl+Fuchs product line. Even with its small size, this incremental encoder is extremely durable and is not affected by environmental conditions. It has an IP67 protection rating, so you can expect reliable performance in dirty, dusty, or even wet conditions. It also has a large temperature range from -40 °C to 100 °C and has proven itself with a long service life at these extreme temperatures as well as operating at high speeds.
Instead of laser displacement sensors
When you’re looking for a solution to a problem or application, there may be a few different ways of solving it. How do you decide which one to use? You usually try to find reasons for why you would use one device over another. I will give you 5 reasons why I would choose a rotary encoder over laser displacement sensors.
Single-axis and dual-axes solar trackers move PV panels to follow the sun
Solar PV panels operate at their greatest conversion efficiency when the incoming light rays strike the panel’s surface perpendicular to the plane of the panels. Considering that the sun is a constantly moving light source, this would occur only once per day with a stationary installation! However, a mechanical system, known as a solar tracker, can be used to constantly move the PV panel to directly face the sun. Solar trackers typically increase the power generated by a solar array from 20% to as much as 40%.
There are many variants of solar tracker designs, involving different approaches and technologies for moving the PV panels to follow the sun. Fundamentally, however, solar trackers can be divided into two basic types: single-axis and dual axis.
Choosing the correct industrial encoder is easy when you know the answers!
There are many reasons why you may need a rotary encoder, but what questions should you ask to determine which one is the most appropriate? Here are seven questions that can help you make the best decision: