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What are you controlling John? Could you measure output pressure or some other process variable at the valve rather than absolute position of the actuator? This is often more meaningful information if you're working with a process, rather than simple positioning, as it also allows you to compensate for input variations if those can cause an output variation.

REB

John Samperi wrote:

At 10:26 AM 21/05/2005, you wrote:

Sounds like you mamy want an absolute encoder. Bourns has one that outputs 
seven
bit gray code. Check http://www.bourns.com/ rotary encoders for the EAW part.

Thanks Bruce

I was just looking at that in the Farnell data book (EAW0J-B24-AE0128)
The 50,000 revolution rotational life may not be good enough.

Regards

John Samperi

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Re: [AVR-Chat] [OT a little]Motor Position Sensor

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