Product Description

GB 8 Fonts Encoder-specific Series coupling Special aluminium alloy coupling for encoder


Description of
 GB 8 Fonts Encoder-specific Series coupling Special aluminium alloy coupling
>Designed for encoder
>Good flexibility, not easy to break
>The elastomer is made of polyurethane, resistant to oil and oxidation

Dimensions of GB 8 Fonts Encoder-specific Series coupling Special aluminium alloy coupling

  

model parameter common bore diameter d1,d2 ΦD L LP S F M tightening screw torque
(N.M)
GB-15X24 3,4,5,6,6.35,7,8 15 24 20 1.8 2.5 M3 0.7
GB-15×32 3,4,5,6,6.35,7,8 15 32 20 1.8 2.5 M3 0.7
GB-18×28 4,5,6,6.35,7,8,9,10 18 28 25 1.8 3.1 M4 1.7
GB-18×38 4,5,6,6.35,7,8,9,10 18 38 25 1.8 3.1 M4 1.7

model parameter Rated torque
(N.M)*
allowable eccentricity
(mm)*
allowable deflection angle
(°)*
allowable axial deviation
(mm)*
maximum speed
rpm
static torsional stiffness
(N.M/rad)
moment of inertia
(Kg.M2)
Material of shaft sleeve Material of shrapnel surface treatment weight
(g)
GB-15X24 0.5 1 2 + 2-5 8000 15 4.5×10-4 High strength aluminum alloy PU

 

Anodizing treatment

8
GB-15X32 0.5 1 2 + 2-5 8000 15 4.5×10-4 8
GB-18X28 0.8 1 3 + 2-5 6000 20 5.6×10-4 13
GB-18X38 0.8 1 3 + 2-5 6000 20 5.6×10-4 13

 

shaft coupling

Comparison of Encoder Couplings with Other Coupling Types

When comparing encoder couplings with other coupling types, such as flexible couplings and magnetic couplings, several key factors come into play:

1. Flexibility: Encoder couplings, like flexible couplings, offer flexibility to accommodate misalignment between the encoder and the driven component. They provide angular, radial, and axial flexibility, ensuring efficient signal transmission while minimizing stress on components.

2. Signal Transmission: Encoder couplings are specifically designed to ensure accurate signal transmission between the encoder and the controlled system. This distinguishes them from other couplings that prioritize torque transmission, such as magnetic couplings used for sealing applications.

3. Backlash Reduction: Encoder couplings often prioritize low backlash to enhance the precision and accuracy of motion control systems. While some other coupling types also aim to minimize backlash, encoder couplings excel in this aspect due to their primary function of accurate signal transmission.

4. Magnetic Couplings: Magnetic couplings are commonly used for torque transmission across a sealed barrier, such as in pump applications. While they offer the advantage of hermetic sealing, they may not be as suitable for precise signal transmission as encoder couplings. Magnetic couplings can also introduce a certain amount of backlash due to their design.

5. Torque Capacity: Flexible couplings and some other types of couplings are often selected based on their torque capacity to transmit power between shafts. Encoder couplings, on the other hand, prioritize signal integrity and precision, making them ideal for applications where accurate motion control is essential.

6. Application Focus: Encoder couplings are specialized for motion control and automation systems that require precise positioning and accurate signal feedback. Other coupling types may have broader applications, including torque transmission, vibration dampening, and sealing.

7. Maintenance: Encoder couplings, like flexible couplings, require periodic inspection and maintenance to ensure proper functioning and accuracy. Magnetic couplings may have different maintenance requirements due to their sealing properties.

Overall, encoder couplings stand out in their ability to facilitate accurate signal transmission and precise motion control. While other coupling types have their own advantages and applications, encoder couplings are specifically tailored to meet the demands of motion control and automation systems where maintaining signal accuracy is paramount.

shaft coupling

Impact of Encoder Resolution on Choice of Coupling

The encoder resolution plays a crucial role in selecting an appropriate coupling for your system. Encoder resolution refers to the number of distinct positions a rotary encoder can detect in one full rotation. Here’s how encoder resolution impacts the choice of coupling:

1. Precision Requirements:

Higher encoder resolutions provide finer position accuracy. If your application demands high precision and accuracy, such as in robotics or CNC machines, a coupling that minimizes backlash and offers precise torque transmission is essential.

2. Backlash Sensitivity:

As encoder resolution increases, the system becomes more sensitive to backlash (play between coupling components). To mitigate this, a coupling with minimal backlash, such as a zero-backlash or low-backlash coupling, is recommended to ensure accurate position feedback.

3. Dynamic Response:

Higher encoder resolutions allow systems to detect even small movements, improving dynamic response. For applications requiring rapid and accurate positioning changes, a coupling that provides high torsional stiffness and low wind-up is beneficial.

4. Mechanical Compliance:

Low-resolution encoders may tolerate some misalignment due to their coarser feedback intervals. However, high-resolution encoders are more sensitive to misalignment, making it important to choose a coupling that accommodates misalignment while maintaining signal accuracy.

5. Coupling Selection:

For high-resolution encoders, consider couplings that provide precision, low backlash, and accurate torque transmission, such as beam couplings, bellows couplings, or Oldham couplings. These couplings help maintain the integrity of position feedback and optimize system performance.

6. Environmental Factors:

The operating environment can affect the choice of coupling. For applications with extreme conditions, such as temperature fluctuations or aggressive chemicals, select a coupling material that can withstand these conditions without compromising the encoder’s accuracy.

Ultimately, the encoder resolution influences the coupling choice by demanding a coupling that complements the precision, accuracy, and dynamic performance required by the application.

shaft coupling

Importance of Backlash Reduction in Encoder Couplings

Backlash reduction is a critical consideration when selecting encoder couplings, particularly in motion control and automation applications that require precision and accuracy. Backlash refers to the angular or linear movement that occurs when the direction of motion changes in a mechanical system.

In encoder couplings, backlash can lead to inaccuracies in signal transmission between the encoder and the driven component. This is especially problematic in applications that involve rapid changes in direction or require precise positioning. The importance of backlash reduction can be understood through the following points:

1. Precision: Backlash can introduce errors in the measurement or position control process. As the system changes direction, the backlash can cause a delay in the response of the encoder, leading to inaccurate position readings or control commands.

2. Repeatability: Systems that require consistent and repeatable motion rely on accurate signal transmission. Backlash can lead to inconsistencies in positioning, making it difficult to achieve the desired level of repeatability.

3. Minimized Error Accumulation: In applications that involve multiple movements and direction changes, backlash can accumulate and lead to a cumulative error over time. This can result in a significant deviation from the intended position or motion path.

4. Smooth Operation: Backlash can cause jerky or uneven motion transitions, affecting the overall smoothness of operation. In applications where smooth and continuous motion is crucial, backlash reduction becomes essential.

5. Feedback Loop Integrity: Many encoder systems rely on closed-loop feedback control to maintain accuracy. Backlash can disrupt the feedback loop, causing the system to overcompensate for the movement delay and leading to instability.

6. System Efficiency: Backlash can result in energy loss and mechanical stress as the system compensates for the delay in movement. This can reduce the overall efficiency of the system.

To address these challenges, encoder couplings are designed with features that minimize backlash. Coupling designs may incorporate mechanisms such as preloading, spring elements, or specialized materials that reduce the clearance between components, effectively reducing or eliminating backlash. By selecting encoder couplings with reduced backlash, motion control and automation systems can achieve higher levels of accuracy, repeatability, and overall performance.

China high quality Special Aluminium Alloy Coupling for Encoder GB-18X38  China high quality Special Aluminium Alloy Coupling for Encoder GB-18X38
editor by CX 2023-08-18