Calculating Output Frequency for Rotary Encoders
March 10, 2013
Here are three handy calculations for incremental rotary encoders:
Frequency = (RPM X Line Count/60)
Use this formula when line count of the encoder and RPM are known. The answer is in Hertz (Hz) or cycles per second. Keep in mind that many encoders and drives will have a maximum frequency limit that you should not exceed.
Line Count = (Frequency X 60/RPM)
Use this calculation when Frequency and RPM are known. Can be useful for determining the highest resolution encoder you can use without over driving the maximum output specifications on the encoder or equipment it is being connected to.
RPM = (Frequency X 60/Line Count)
Use this formula when frequency and line count are known. This is useful when you are trying to determine the speed of rotation.
Quantum Devices Inc. has a calculator for finding RPM, Encoder output Frequency or Line count (Resolution) when given the other two variables.
You can check it out here: https://www.quantumdev.com/Calculator.html
Quantum Devices is a manufacturer of rotary encoders. Incorporating QDI’s patented sensor technology, our QPhaseTM Family of Encoders feature high resolution, increased frequency response and superior reliability over temperature (0 to 120 degrees C). QDI incremental and absolute encoders set a new standard and are backed by a 2 year factory warranty. We invite you to request an evaluation unit, additional information or price quotations.
The Quantum Devices main web site can be found at www.quantumdev.com