once again, goodnight and good morning sir randy...almost done, that's why the other day 4 & day 5 will be tackled tomorrow evening...
much appreciated of another excellent presentation of sir randy...thanks and to the digikey and design news to make this continuing education happen...
this is a great opportunity for us professional wants to earn PDH Certificate for continuing education in the field of engineering profession...
Haha, thanks Steve! Yeah, I had to raise and then immediately lower the volume several times througout, but still educational and enjoyable. Thanks Randy and Alex for another great presentation.
Keep in mind, flush-mounting will reduce a capacitive sensors range somewhat. So, if you are having trouble with this, or would just like more range and you are not forced to flush-mount them, leave it sticking out a bit.
It would be great if someone would add links to all the presentations in the individual series at the top of the sessions. So this sesion would have links to the first 2 presentations before it.
I was interrupted during the original presentation. I just went back and replayed the presentation on this page without accessing the archive. will I get credit for attending this presentation?
I'm not sure how that rotary position sensor works. is it capacitive? i thought they were implementing these sensors with semiconductor based generators and silicon based optical encoders.
Danlafleur: Thanks. Last ckt I made used SS relays from Mouser that switched 120 VAC with a 6 ma DC trigger. Much better than having to build a relay chain to get to the output requirement. I will need something in the future for an automotive application that can directly control glow plugs. So the output would be hundreds of amps DC at 10-13 V.
You can buy a L3G4200D MEMS gyroscope for less than $30 retail if you don't need a part that is designed for extreme conditions - Cost is relative depending on the application and cost of downtime :-)
It's not just the volume level--- the interruptions interrupt the presentor, distracting them and throwing off their presentation. I can figure out what slide he's on.
$900 seems like a lot of money, until that's what you need to solve a problem. I remember inertial navigation units in a sealed platform with real gyros, acellerometers ans lots of precision mechanical parts.
My confusion may come from looking at the time diagram, where a pulse that is initially 90 degres ahead of the reference pulse, may miss the clock and the pulse that is 270 degres may be taken as behind the reference pulse.
On pp #13 sine and cosine both have the same values...
Resolvers have quadrature outputs. You also need to look at the colors. For a resolver position of 0, the sine output is zero and the cosine output is full scale. At 45 degrees, they are equal at 0.707* full scale.
I used to work in a sandpaper factory. The metalic dust got in erery thing and scratched up all the infrared bar code stripes I worked with something fierce
Aren't the phases measured separately as process outputs?
The two sensors look at the same encoding disk. They are set during manufacture so that the phase is approximately 90 degrees apart (electrically). Mechanically, they can be anywhere around the circumference of the disk. They just need to be spaced so that when one sensor transisitions, the other sensor is in the middle of bar.
Alex, could you use a softer voice when you chime in? My volume is at mx so I can hear Randy. When you join in my pods are blown off and then I can't hear Randy because my ears are filled with blood. Thanks
@alaskaman66, as danlafleur mentioned, if the optical disk gets contaminated, then it would certainly affect the output and yes, the emitter/detector components are sealed.
Are encoders still available using different coding schemes such as BCD, Binary, etc.? Are "Gray codes" still used where only one bit changes from one position to the next?
Alaskaman66: igbts have a gate input as opposed to the base of a transistor. As long as the port pin can supply the required charge fast enough to switch at the rate you want it shouldwork.
The streaming audio player will appear on this web page when the show starts at 2pm eastern today. Note however that some companies block live audio streams. If when the show starts you don't hear any audio, try refreshing your browser.
UK-based Plastic Logic and French company ISORG have created what the pair tout as a first in flexible printed electronics: a large area, conformable, organic image sensor printed on plastic.
For 3D printing to make the jump from rapid prototyping to manufacturing, engineers will need to find easier ways to move products from their CAD screens to their printers.
Gigabit and PoE are two networking technologies moving ahead in tandem as industrial users power remote Ethernet devices such as IP security cameras at 1,000 Mbps over existing CAT5 cable.
From Dell / Intel® New Paradigms in Design Work Scott Hamilton, vertical market strategist for Dell Precision workstations, 5/2/2013 5
Early in my career, I worked as a draftsman and remember the days of drawing on vellum with numbered pencils and Mylar with plastic lead. This was a fun experience in the sense that I ...
I've been using workstations for more than 10 years and love finding ways to get more performance from my system. With demanding professional applications that require more power each ...
A lasting memory from my first job as an engineer in an auto assembly plant is standing on hard concrete at six in the morning, vending-machine coffee clutched in hand, listening to ...
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This radio show will show what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.
To save this item to your list of favorite Design News content so you can find it later in your Profile page, click the "Save It" button next to the item.
If you found this interesting or useful, please use the links to the services below to share it with other readers. You will need a free account with each service to share an item via that service.
Tweet This
1 
