Rotary Optical Encoder Calculator
March 18, 2015
Encoder Resolution, RPM & Frequency Calculator
We just added an online calculator that provides a way to calculate RPM, Frequency, or line count (optical encoder resolution) by entering in the other two variables. Leave the third field empty (do not enter zero).
Use to solve for Frequency, Line Count or RPM
When would you want to use such a tool? You might find it useful under the following circumstances:
Solving for Resolution:
When trying to determine the line count of an unknown encoder if you spin the encoder at a given RPM, then use an oscilloscope and find the output frequency, you can find out the resolution of an unknown encoder.
Solving for Frequency:
If you know the RPM and line count of your optical encoder you can calculate the output frequency. This is a useful check when you are designing in an encoder to make sure you do not overrun a the input frequency limit of a drive, controller, or other device.
Solving for RPM:
This is often times used to validate the actual speed at which a machine or motor is running.
To do these calculations by hand you can check out the other blog post we have on calculating optical encoder output frequency.
Quantum Devices is a manufacturer of incremental optical 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.