How to choose the right rotary joint

What Is a Fiber Optic Rotary Joint?

The fiber optic joint is to fulfill the essential requirement of connectivity. Just as the slip ring transfers power and signal from moving parts to a stationary one, the RF rotary joint passes signal and a massive data across rotating parts without any loss, damage, or mix up.


Now you understand why you should compare and relate it with slip rings. The joints are to facilitate the transfer of data just as the electro slip ring does to electrical signals. The significant part of RF rotary joints is that they pass both the analog and digital signals.


Types of Fibre Optic Rotary Joints

There are different fiber optic manufacturers in the market. However, each makes the RF rotary joints according to set standards and customer specifications. There are two ways to classify joints. You can have active or passive or have single or multiple channels. Let’s look at the first one.


Passive and Active Types

It is like analyzing the analog and digital signals. They are different, carry specific functions, and that is why we shall look at them separately:


Active rotary joints: Active rotary joints contain light source at one end at the rotary and interphase or detector on the other side. When you look at it this way, you find that most electronics are integral to the active unit of the RF rotary joints.


Most of the active joints are designed to transfer electronic signals of a rotating body without using a mechanical slip ring to avoid the challenges of wear, data loss and isolation, and ground loop problems. So can one say they are a perfect substitute for a slip ring? The answer is yes!


Passive rotary joints: They are for passing optical signals rather than electrical signals. They provide a continuous fiber-optic connection between stationary and rotating parts. It can be looked at to be like passing analog signals.


The good part here is that passive rotary joints can be converted into existing ones by adding appropriate electronic and optical devices. So, which is another way can you categorize the RF rotary joints?

Benefits of RF Rotary Joints

Many industrial settings use rotary joints. With the increase in preciseness, reduction of data loss, and efficiency, many people are adopting the use of the Fibre optic rotary joints. So what are the befits if using the rotary joints?


They are thinner than copper wires. When you compare to the copper wires in a slip ring, the fiber optic cables are smaller. That makes them the at to use in multi-channel connections and also to use in compact spaces.

The FR rotary joints have a high signal carrying capacity. That is what the joints are all about. Manufacturers make them meet the challenge of taking large amounts of data from the rotor to stator without any loss, damage, or mixup of any kind.



Just slip rings are for electrical signals, the fiber optic rotary joint is to use to transmit a large volume of data from moving part to stationary parts. You can find them in the market depending on your specifications or find the standard once made by the manufacture.

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