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.
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.
$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.
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
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