August 12, 2015
I received an email from a customer who was seeing “not symmetrical” optical encoder signals/data channels on optical encoders we shipped to them. Hi Jim, The data channels are not symmetrical and there appears to be something superimposed on the index. Attached are pictures. Can I return these for your...
August 10, 2014
Sometimes you don’t have the right tools to do the job. Let’s say you needed to identify where the index pulse was firing on your incremental encoder, but you left your oscilloscope in your other jacket pocket, and now all you have on hand is a Digital Multimeter (DMM). Well...
August 2, 2014
What’s with this Black-White Wire? Quantum devices QR145 and QR200 optical encoders feature an extra black & white striped wire that serves as an alternate grounding connection for the encoder. This wire is intended to be used in situations where the encoder flex mount is not case grounded. The Black/White...
July 19, 2014
O. Another Way to Mount an Optical Encoder Instead of using an end bell, a lot of our motor manufacturer customers recess the QD145 optical encoder into an extended motor housing and then seal the motor with an endplate. This has the advantage of being a lower cost item to...
June 29, 2014
Which Encoder Wires Should I Use to Begin Understanding Incremental Encoder Signals? Channels A & B (Incremental Channels) Use only A (or only B) for an RPM or counting applications where the rotation is either unidirectional, or where you don’t need to know direction. Use A and B together to...
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...
June 4, 2014
April 27, 2014
. I have interfaced a 200 line count QR145 optical encoder to a DL06 PLC. The PLC’s inputs are set up in high speed mode to receive the incremental quadrature pulses coming from the optical encoder. . CT174, the designated high speed up/down counter is used to interface to the...
April 19, 2014
I have interfaced a QR145 200 Line Count Optical Encoder to a DL06 PLC and set up the PLC for mode 20 ‘High speed Up/Down counter’. Here is a video of Optical Encoder Counting: Below is the ladder logic code for programming the PLC to count pulses from the QR145...
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