What type of valve and or application?

----- Original Message -----
From: "John Pearson" <xero@CMC.NET>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Tuesday, March 04, 2003 1:17 PM
Subject: [EE]: Need motorized motion primer


I need an thumbnail education on motorized motion options.

I need to control a small valve. It will need to be constantly adjusted back
and forth to maintain a precise pressure within the tube it will be mounted.

I figure I have 3 basic options: Servo motor, stepper motor, and gear-drive
motor (forward & reverse movement)

Range of motion would be <= 90 degrees.

I know a little about servos. Have done some programming on them. The
others, no experience or knowledge.

What would be the easiest and least expensive, programming and hardware
wise?

Any other options?

Thanks

John

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