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: The shaft of the incremental hollow shaft encoder is hollow, which allows it to be installed in a limited space while allowing other components (such as cables, air tubes, etc.) to pass through the shaft, 

increasing design flexibility.

Multi-phase output: In order to distinguish between positive and negative rotation and detect zero point, incremental hollow shaft encoders usually include phase A, phase B and phase Z. Phase A and phase B differ by 

1/4 cycle (phase difference of 90 degrees), which can be used to distinguish between positive and negative rotation; phase Z is a single-turn pulse, which is generated by the code disk rotating once, and can be used as the reference zero position of the encoder.

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

Incremental hollow shaft encoders are widely used in a variety of applications requiring precise measurement and control due to their compact structure, accurate measurement and easy installation, such as:

Industrial automation: for motion control of machine tools, robots, motor feedback systems and other equipment.

Automotive electronics: used in automobiles for volume adjustment, temperature control and other functions.

Household appliances: such as audio equipment, air conditioning, etc., for the realization of the precise adjustment of the function.

Other fields: such as measurement and control equipment, printing and packaging machinery.

5. Hollow rotary encoder's Precautions

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.