March 2, 2016
When using an incremental rotary encoder, you often have to know how many pulses there are per degree of rotation. This is a very straightforward math problem. Pulses per Degree = Number of encoder pulses per rotation/Number of degrees in a circle For a 5,000 line count incremental encoder we...
February 9, 2016
I recently received an e-mail asking for some help picking the right resolution for an optical incremental encoder. I have removed the personal information and the drive/controller information, otherwise the e-mail is verbatim: Hi, I am using a motor controller in dual loop velocity mode. What resolution incremental encoder would...
January 20, 2016
We recently teamed up with one of our Optical Encoder Distributors to create a Demo box that showcased our QD145 encoder with a Delta Tau PLC and touchscreen panel. It was sent off to a trade show where potential customers would get to spin the encoder and watch on the...
January 9, 2016
We only need to measure one of the incremental channels in order to calculate the RPM of an optical encoder. Using an oscilloscope to measure the period of one incremental channel A cycle. We will need to find the frequency of the incremental signal. Keep in mind that converting...
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...
June 17, 2014
Gray code was named for Frank Gray, a Bell labs researcher, who patented the procession in 1953, even though a form of it was used by Emile Baudot for telegraphy as early as 1878. The most important thing to understand about Gray code is that only one bit changes from...
April 23, 2014
I have interfaced a 200 LC QR145 to a DL06 PLC to show how to convert from a line count to mechanical degrees. This type of conversion may be useful for any application of optical encoder to measure angles. To calculate a degree measurement we divide 360 by the line...
March 26, 2014
While most of us are familiar with how to measure something in mechanical degrees, incremental encoder signals are measured in electrical degrees. 360 electrical degrees is the period in which a signal completes one high to low transition. This can be in any sort of waveform, but for encoders electrical...
August 13, 2013
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