Re: [CAD_CAM_EDM_DRO] Resolver to Incremental Encoder

Keith Bowers wrote:

>On Friday 07 January 2005 12:24 pm, Jon Elson wrote:
>
>
>>Babar wrote:
>>
>>
>>>Hi All,
>>>
>>>Does anyone know how to convert resolvers output to
>>>Standard Digital Incremental Encoder type output?
>>>
>>>
>>Analog Devices has a chip that does this. The AD2S1200WST is
>>the first one that is actually affordable, at $21.00 each. It doesn't
>>take much in the way of external circuits, mostly just resistors and
>>capacitors, and it does provide a quadrature encoder output (as well
>>as absolute position). US Digital makes encoders that could also be used.
>>
>>Jon
>>
>>
>Thank you for the info; I'd missed seeing the announcement of the release.
>Looks like the solution for upgrading the controller on my 2-axis Tree mill.
>After reading the data sheet it does look like handling the "reset" pin on
>power-up will require a bit of care. Also, it looks like it would be a good
>idea to do a bit with the error signals and feed the result back to the
>controller.
>Now I have too look into how I can breadboard those flat packs at a reasonable
>price. I really don't want to try etching a board with traces that fine.
>Especially since it's been 20+ years since I made boards. If I go to Express
>PCB or some such I may as well buy a couple of encoders 8:(
>
>

Or, get a bunch of boards and sell them to other people that have the
same problem.
PC boards are free, it is the setup charge that you pay for! Buy one
board, it costs
$1000. Buy 1000 boards, they are $1 each. (If you don't believe me,
price out some
boards at one of the low-cost PC board fabricators. What I say above is
almost a
perfect straight-line fit.)

Jon