Incremental Hollow Encoder

Incremental hollow encoder, i.e. incremental Hollow Shaft encoder, is a special type of encoder:

I. Incremental hollow encoder's working principle

Incremental hollow shaft encoder is a kind of sensor that can convert distance (linear displacement) and angle (angular displacement) into electrical signals and output. The principle of operation is based on the rotation 

of a code disk, which is divided into light and dark gratings of equal size. As the disk rotates, the receiving end detects changes in the 0's and 1's of the light and converts them into electrical pulses that are output. By 

counting these pulses, the size of the displacement can be determined.

2.Incremental ring encoder's Structural features

Hollow Shaft Design

Compact and lightweight with easy shaft integration, allowing direct mounting without couplings.

High Resolution Output

Provides precise position feedback with resolutions up to several thousand pulses per revolution (PPR).

Robust Signal Transmission

Supports A/B/Z output channels with differential line drivers for noise immunity in industrial environments.

Wide Voltage and Output Options

Available with 5V, 12V, or 24V supply, and compatible output types like TTL, HTL, or open collector.

Durability and Long Service Life

Built with high-quality bearings and sealed housing to resist dust, vibration, and moderate moisture.

3.Performance Parameters

The performance parameters of incremental hollow shaft encoder include but are not limited to:

Resolution: The number of pulses that can be generated per revolution of the encoder, such as 15 pulses/360°, 2000PPR (Pulse Per Revolution), etc.

Operating voltage: the voltage required for the encoder to work properly, e.g. DC 5V, etc.

Operating Temperature: The temperature range in which the encoder can work normally, such as -40°C~85°C, etc.

Rotational life: the life of the encoder under rated load and speed, e.g. 50,000 cycles Min, etc.

4.Encoder hollow shaft's Application Areas

1. Industrial Automation: Incremental hollow encoders are widely used in CNC machines, robotic arms, and conveyor systems for precise position feedback. Their hollow design allows cables or shafts to pass through, saving space in compact industrial setups while maintaining high-resolution motion control.

2. Medical Equipment: In advanced imaging systems like CT scanners and surgical robots, these encoders provide accurate rotational data without obstructing central components. Their non-contact sensing ensures reliability in sterile environments where maintenance access is limited.

3. Aerospace & Defense: Critical for flight control systems and satellite positioning mechanisms, hollow encoders withstand extreme vibrations while offering lightweight solutions. The incremental output enables real-time adjustments in guidance systems and antenna positioning.

4. Renewable Energy: Wind turbine pitch control systems utilize hollow encoders to monitor blade angles precisely. The through-shaft design accommodates power cables while resisting environmental factors like moisture and temperature fluctuations.

5. Semiconductor Manufacturing: In wafer handling robots and lithography equipment, these encoders ensure micron-level positioning accuracy. Their compact form factor integrates seamlessly with vacuum-compatible systems used in cleanroom environments.

Installation: When installing incremental hollow shaft encoders, make sure that the shaft centers are aligned to avoid excessive radial or axial loads.

Maintenance: Regularly check the encoder's connecting cables and interfaces to ensure a reliable connection and avoid loosening or damage.

Use of the environment: avoid encoders working in harsh environments such as humidity, high temperature, strong magnetic fields, etc., so as not to affect its performance and life.

To summarize, incremental hollow shaft encoder is a kind of high-precision and high-reliability sensor, which is widely used in various industrial automation and measurement and control fields. When selecting and using,

 comprehensive consideration should be made according to the specific application requirements and working environment.