QD145 Incremental Encoder IP66 Sealing Option

February 24, 2016

Quantum Devices Inc. has a mounting option that allows for IP66 sealing of the QR145 Incremental Encoder. There are two o-rings in the clam shell design; one o-ring seals the encoder to the mounting surface (usually a motor) and the other o-ring seals the end bell housing that covers the...

Cross-Referencing RENCO Incremental Encoders for Replacement

February 3, 2016

We have always been able to come up with a suitable replacement for Renco encoders, but our customers are making us aware that we need to point that out. For those who don’t know, Renco, after being absorbed by Heidenhain, made the decision to eliminate much of their encoder product...

The Use of Potentiometers in Incremental Encoder Design

January 26, 2016

Potentiometer vs Encoder Recently, I decided to catalog the competitive Incremental Encoders that have populated the shelves surrounding my desk. In doing so, I was surprised to find that many of our competitors use potentiometers in their designs. I can understand why they need to use potentiometers. In most designs...

The Lost Optical Encoder Demo Box

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...

Why Can’t I See My Optical Encoder Output Signals?

October 21, 2014

Why Do My Incremental Encoder Signals Disappear? Today I was called to the production floor after one of the test Technicians noticed that the encoder signals disappeared from the oscilloscope when they ran the encoders “unloaded”. I asked one of the techs if the encoders being tested were of the...

Brushless Motors vs Brush Motors, What’s the Difference?

August 27, 2014

What’s the Difference Between a Brushless Motor with a Commutating Encoder and a Brush Motor? Well, the brushes of course. And, without brushes – the need for a commutating encoder for current carrying. Yeah, but what does that mean? The principle behind the internal working of both a brushless DC...

Inverted Flex Mount for QD145 Optical Encoder

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...

Gray Code for Rotary Incremental Encoders

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...

Build an Incremental Encoder Quick Tester

May 6, 2014

How to Build a Portable Incremental Encoder Tester Every once in while, it’s nice to have a handheld device that can be used to see quickly if encoder signals are present. I designed and built a quick-tester that allows for fast interface to an encoder without having to drag out...

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