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Figure 1

So far in this blog we've written about encoders that are moved by something else. They're attached to a motor shaft, or a linear actuator, or conveyor belt. Their job is to report their position as they're moved by an external force; other than that, they're just along for the ride. Well, sometimes - the encoder is the ride! Sometimes the encoder moves first, and everything else reacts to...   Read More »

Published in Blog Posts on Monday, September 23, 2019

DWG 001: Analog Voltage Output

In an earlier post to this blog, we introduced Absolute Encoders. We illustrated the differences between absolute and incremental encoders, and showed that an absolute encoder can give a unique report for each different position on the encoder disk. But we didn't talk about what that report looks like. Looking back to incremental encoders for a moment, each part of their output waveform looks...   Read More »

Published in Blog Posts on Monday, September 9, 2019

DWG 001: Degree – Arcmin – Arcsec

In the motion control industry, accuracy is the difference between target position and actual position. For rotary encoders, we measure accuracy in degrees, arcminutes or arcseconds. 1 degree = 1/360th of a circle - used with low accuracy encoders arcminute = 1/60th of a degree - used with medium accuracy encoders arcsecond = 1/60th of an arcminute - used with high accuracy...   Read More »

Published in Blog Posts on Monday, August 26, 2019

Drawing 001: Two Outputs - Quadrature

In earlier posts to this blog, we introduced incremental encoders in Encoders 009 and continued that discussion in Encoders 011, where we talked about Quadrature and Index. In today's post, we'll introduce another major category of encoders: Absolute Encoders. Where Are We? In our posts on incremental encoders, we developed a simplified picture showing essential components: In...   Read More »

Published in Blog Posts on Monday, August 5, 2019

AOA and AOS sensors

The surge in popularity of drones in recent years has been remarkable. Although sometimes we hear about them when they cause trouble—like flying too close to commercial aircraft—more frequently we hear about drones because of the interesting new ways they're being put to use. Drones are used in agriculture, to monitor crop growth and field conditions. Home inspectors for insurance...   Read More »

Published in Blog Posts on Monday, July 22, 2019