The Purpose of Absolute Shaft Encoder: A Guide

Did you know machines can know how much they have moved or where exactly they are, especially after a load shedding? Yes, and that’s all possible because of a small device called the absolute shaft encoder. The concept is simple, machines like CNC machines, motors and robots keep moving back and forth and it’s vital for them to know where they are, how far they have turned and which direction would they be turning to next. In machines, the shaft encoder works as a gps system, guiding it to track their movement.

So, in today’s blog we will discuss more on this tiny device that is so powerful and essential in modern-times machine. Keep reading to learn more about it with Briter Encoder.

But, first, what is an Absolute Shaft Encoder?

Simply put, this is a small device that is connected to a rotating part, like a motor shaft. This shaft then sends a unique digital signal for every angle or position the shaft is in. However, unlike other encoders that only count steps or movement, the absolute encoder is better known for always knowing the exact position.

Now, there are two main types of an absolute shaft econder; the single-turn encoder and then multi-turn encoder.

The Single-Turn Encoder is used for measuring the angle in one full turn (0° to 360°) and is best for simple tasks where it only requires on rotation. However on the other hand, the Multi-Turn Encoder counts full rotations (like 5 or 100 turns) including the angle. This tiny guy is a great choice for machines like cranes or elevators that spin many times.

(Related blogs: Understanding the Difference Between Single-Turn vs. Multi-Turn Encoder Technologies)

How does it function and what are its key features?

The encoder comes with a disc with special codes or patterns so as the shaft spins, a tiny sensor reads the pattern and sends out a digital signal to a computer or controller.

Depending on the type of technology, the encoder can use either Light, an optical encoder to read patterns like a scanner, Magnetic fields encoder to read positions even in dust or water, or a Capacitance encoder that can detect tiny changes and save energy. either ways it is almost like an eye that watches the movement for the machine and lets them know what is happening and what do to next.

Apart from that, the following are some of the super cool features that make the absolute shaft encoder a really special device.

• Unique Position Codes

In absolute shaft encoders, every angle has its own digital code. So, even if the power goes off, the encoder will remember where it was.

• High Accuracy

They can detect very tiny movements, in fact, movements as small as a few micrometers.

• Compact Size

They are small enough to fit inside tight spaces, which makes it perfect for CNC machines and motors.

• Works in Harsh Places

The Magnetic absolute shaft encoder for harsh environments can handle dirt, oil, and vibration making them Ideal for factories or outdoors.

How does the Absolute Shaft Encoder benefit the machines?

As we’ve been saying, this little device is big in the world of machinery. Let’s see how:

• Remembers Position Even After Power Loss

When the machine using an absolute encoder is turned off, unplugged or has a sudden power failure, it won’t forget its position. As soon as power is back on, it will pick up right where it left off, no need to press a button.

This saves time during startup, reduces the risk of damaging parts due to incorrect positioning, increases safety in critical systems like elevators or robotic arms and prevents you from installing extra sensors just to find the starting point.

• Real-Time Feedback for Motion Control

This shaft encoder sends position data to the controller in real time, so the system knows exactly how far it’s turned, how fast and in which direction. This allows closed-loop systems where movements can be corrected instantly, even during high speed operations.

• Very Accurate and Precise

As you now know, Absolute encoders can detect the slightest movement of a shaft. But many models can measure angular changes as small as a fraction of a degree, they’re very precise. Great for high precision tasks like cutting, engraving or assembling, avoiding errors and finally guiding the robotic arms or CNC machines to move exactly as they were programmed to!

• No Reset Required

In most cases with incremental encoders, machines need to go back to their zero position every time they power up after a power outage. But with Absolute encoders, machines don’t need to reset because they always know their current position.

This means machines are ready to go immediately, saves time and increases efficiency, reduces overall mechanical wear and tear from constant resetting and finally improves automation especially in busy production lines.

• Compact and Easy to Mount

These encoders may be small but packs a punch. Available in various shapes and shaft sizes, you can fit them in tight spaces or directly on motors. You can buy compact absolute shaft encoder for CNC machines that saves space in machines with limited room and allows flexible mounting positions and quick installation that reduces labor time.

• Long Term Reliability

Thanks to their design and build, these absolute encoders can run for years without failure. This means long term consistency and reduces machine downtime and repair costs, automatically increases productivity and reliability in manufacturing.

• Safer Machines and Operations

And finally, its position feedback ensures machines are less likely to crash, overshoot or operate incorrectly, protects workers from accidents, prevents damage to expensive equipment and finally ensures product quality is high and unbothered.

How to Choose the Right Absolute Shaft Encoder?

Briter Encoder is a hub to such devices that ensure your machine work runs smoothly without causing any disruption. So, when you are choosing an encoder for your machinery, ensure to check the following key points:

• Determine the type of machine you use. If it is a light-duty machine like a robot, use the optical encoders. It if it for a heavy-duty machine, use magnetic encoders.

• Choose whether you need it for single turn, or multiple turn.

• Ensure the signal output matches with your system.

• Finally, ensure the size fits your machine space and shaft size properly.

Bottom Line

Briter Encoders offer long-lasting, trusted encoders that come in smart, compact design, are perfect for multi-turn complex machines, and magnetic options that allows your machine to work efficiently without dropping the quality of the work, increasing budget or manpower, or, causing any other unnecessary hazard during the task. So, make a smarter purchase and choose Absolute Shaft Encoder.

Briter Encoder now offers the absolute shaft encoder that is responsible for smooth-flow in modern industrial applications. Read more here.