Calculate Rotary Encoder Degrees per Step for Any Circumference

What is a Rotary Encoder?

A rotary encoder is an electromechanical device that converts the angular position or motion of a shaft or axle into a digital signal. It provides feedback about the position, speed, and direction of rotation. Rotary encoders are widely used in various applications, including robotics, CNC machines, automotive systems, and consumer electronics.

There are two main types of rotary encoders: absolute and incremental. Absolute encoders provide the exact position of the shaft at any given time, while incremental encoders provide relative position information based on the number of steps taken since a reference point.

Degrees Per Step Formula

The degrees per step of a rotary encoder can be calculated using the following formula:

Where:

• 360° is the total degrees in a full rotation
• Number of steps per revolution is the total number of steps the encoder completes in one full rotation

For example, if an encoder has 1000 steps per revolution, the degrees per step would be:

This means the encoder can detect changes in position as small as 0.36 degrees.

How to Use This Calculator

Our calculator makes it easy to determine the degrees per step for any rotary encoder. Simply follow these steps:

1. Enter the circumference of the encoder's output shaft in the provided field.
2. Select the appropriate unit for the circumference (millimeters or inches).
3. Enter the number of steps per revolution for the encoder.
4. Click the "Calculate" button to get the degrees per step.

The calculator will display the result in degrees per step, along with an explanation of what this value means for your specific encoder.

Common Encoder Types

There are several types of rotary encoders, each with its own characteristics and applications:

• Incremental Encoders: Provide relative position information based on the number of steps taken since a reference point. They are commonly used in applications where the exact starting position is not critical.
• Absolute Encoders: Provide the exact position of the shaft at any given time, regardless of the starting position. They are used in applications where precise positioning is essential, such as in CNC machines.
• Optical Encoders: Use light to detect the position of the encoder's code disk. They are known for their high resolution and accuracy.
• Magnetic Encoders: Use magnetic fields to detect the position of the encoder's code disk. They are commonly used in harsh environments where optical encoders may not be suitable.

Applications

Rotary encoders are used in a wide range of applications, including:

• Robotics: Providing precise position feedback for robotic arms and joints.
• CNC Machines: Enabling accurate control of machine tool movements.
• Automotive Systems: Monitoring the position of various components in vehicles.
• Consumer Electronics: Used in devices such as printers, scanners, and gaming controllers.
• Industrial Automation: Enabling precise control of industrial machinery and processes.